Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/Raster.java @ 814:9d427dd2a96a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added Javadoc in statistic package. gnv-artifacts/trunk@898 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 09 Apr 2010 14:34:45 +0000
parents d766fe2d917a
children 05bf8534a35a
rev   line source
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
1 package de.intevation.gnv.raster;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
2
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
3 /**
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
4 * A 2D double valued representation of a raster array.
780
c4156275c1e1 Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 495
diff changeset
5 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
6 */
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
7 public class Raster
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
8 {
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
9 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
10 * A kernel can be applied to a raster to fold its values.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
11 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
12 public static class Kernel {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
13
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
14 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
15 * The coefficients of the folding matrix.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
16 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
17 public static final class Coeff {
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
18 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
19 * i delta index of this coefficient.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
20 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
21 public int di;
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
22 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
23 * i delta index of this coefficient.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
24 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
25 public int dj;
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
26 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
27 * The weight of this coefficient.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
28 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
29 public double c;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
30
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
31 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
32 * Default constructor
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
33 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
34 public Coeff() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
35 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
36
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
37 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
38 * Constructor to set the delta position and the weight of
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
39 * the coefficient.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
40 * @param di The i delta index.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
41 * @param dj The j delta index.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
42 * @param c The weight of the index.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
43 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
44 public Coeff(int di, int dj, double c) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
45 this.di = di;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
46 this.dj = dj;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
47 this.c = c;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
48 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
49
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
50 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
51 * Returns a string representation of this coefficient.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
52 * @return The string representation.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
53 */
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
54 @Override
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
55 public String toString() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
56 return String.valueOf(c);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
57 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
58
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
59 } // class Coeff
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
60
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
61 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
62 * The coefficients of the folding matrix.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
63 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
64 protected Coeff [] coeffs;
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
65 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
66 * The width of the kernel.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
67 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
68 protected int width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
69
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
70 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
71 * Default constrcutor.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
72 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
73 public Kernel() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
74 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
75
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
76 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
77 * Constructor for a kernel with a given coefficient matrix
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
78 * with a given width.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
79 * @param coeffs The coefficients.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
80 * @param width The width of the kernel.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
81 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
82 public Kernel(Coeff [] coeffs, int width) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
83 this.coeffs = coeffs;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
84 this.width = width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
85 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
86
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
87 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
88 * Evaluates the 2D Gauss normal distribution a given x, y
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
89 * and a given sigma.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
90 * @param x The x location.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
91 * @param y The y location.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
92 * @param sigma The sigma of the distribution.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
93 * @return The value at point x, y.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
94 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
95 public static double gauss(double x, double y, double sigma) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
96 double s2 = sigma*sigma;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
97 return 1.0d/(2.0d*Math.PI*s2)*Math.exp(-(x*x + y*y)/(2.0d*s2));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
98 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
99
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
100 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
101 * Creates a Gauss kernel with sigma = 1 and width 5.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
102 * @return The new kernel.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
103 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
104 public static Kernel createGauss() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
105 return createGauss(1.0d, 5);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
106 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
107
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
108 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
109 * Creates a Gauss kernel with a given sigma and width.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
110 * @param sigma The sigma value
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
111 * @param width The width of the kernel.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
112 * @return The new kernel.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
113 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
114 public static Kernel createGauss(double sigma, int width) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
115 Coeff [] coeffs = new Coeff[width*width];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
116 double sum = 0d;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
117 for (int j = 0; j < width; ++j) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
118 int y = -width/2 + j;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
119 for (int i = 0; i < width; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
120 int x = -width/2 + i;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
121 double c = gauss(x, y, sigma);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
122 coeffs[j*width + i] = new Coeff(x, y, c);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
123 sum += c;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
124 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
125 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
126 sum = 1.0/sum;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
127 for (int i = 0; i < coeffs.length; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
128 coeffs[i].c *= sum;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
129 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
130 return new Kernel(coeffs, width);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
131 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
132
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
133 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
134 * Evaluates this Kernel at the raster at raster index i, j.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
135 * @param access The accessor to the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
136 * @param i The i raster index.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
137 * @param j The j raster index.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
138 * @return The folded value at index i, j.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
139 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
140 public double fold(Access access, int i, int j) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
141
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
142 double s = 0.0d;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
143
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
144 double unused = 0d;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
145
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
146 for (int k = 0; k < coeffs.length; ++k) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
147 Coeff coeff = coeffs[k];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
148 double v = access.get(i + coeff.di, j + coeff.dj);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
149 if (Double.isNaN(v)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
150 unused += coeff.c;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
151 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
152 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
153 s += v * coeff.c;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
154 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
155 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
156
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
157 return s*(1.0d - unused);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
158 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
159
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
160 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
161 * Returns a string representation of this kernel.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
162 * @return The string representation.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
163 */
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
164 @Override
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
165 public String toString() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
166 StringBuilder sb = new StringBuilder();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
167
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
168 int height = coeffs.length/width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
169
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
170 for (int j = 0; j < height; ++j) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
171 if (j > 0) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
172 sb.append(System.getProperty("line.separator"));
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
173 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
174 for (int i = 0; i < width; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
175 if (i > 0) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
176 sb.append("\t");
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
177 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
178 sb.append(coeffs[j*width + i]);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
179 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
180 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
181
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
182 return sb.toString();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
183 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
184 } // class Kernel
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
185
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
186 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
187 * Interface of allow special access patterns to the raster,
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
188 * especially at the border.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
189 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
190 public interface Access {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
191
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
192 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
193 * Returns the raster value at a given index point.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
194 * @param i The i index
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
195 * @param j The j index
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
196 * @return The value of the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
197 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
198 double get(int i, int j);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
199
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
200 } // interface Access
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
201
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
202 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
203 * Interface to decouple the lookup which is needed
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
204 * to map double values to integers.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
205 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
206 public interface ValueToIndex {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
207
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
208 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
209 * Returns the corresponding integer to a given value.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
210 * @param value The value to be queried.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
211 * @return The integer value or -1 if no such value was found.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
212 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
213 int toIndex(double value);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
214
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
215 } // interface ValueToIndex;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
216
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
217 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
218 * Brings raster to an integer representation with equal sized bins
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
219 * of integer vaules.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
220 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
221 public static class IsoClasses
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
222 implements ValueToIndex
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
223 {
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
224 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
225 * Linear scaling factor.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
226 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
227 protected double m;
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
228 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
229 * Linear offset.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
230 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
231 protected double b;
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
232 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
233 * Number of classes.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
234 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
235 protected int numClasses;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
236
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
237 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
238 * Constructor to build a lookup to transform
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
239 * an raster into an equals sized bin integer array.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
240 * @param raster The original raster
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
241 * @param numClasses The number of classes.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
242 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
243 public IsoClasses(Raster raster, int numClasses) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
244
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
245 this.numClasses = numClasses;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
246
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
247 double min = Double.MAX_VALUE;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
248 double max = -Double.MAX_VALUE;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
249
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
250 double [] src = raster.raster;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
251
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
252 for (int i = 0; i < src.length; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
253 double x = src[i];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
254 if (!Double.isNaN(x)) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
255 if (x < min) min = x;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
256 if (x > max) max = x;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
257 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
258 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
259
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
260 /* f(min) = 0, f(max) = numClasses - 1
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
261
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
262 I: 0 = m*min + b
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
263 II: numClasses - 1 = m*max + b
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
264
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
265 II - I:
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
266 numClasses - 1 = m*(max - min)
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
267
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
268 m = (numClasses - 1)/(max - min)
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
269 b = m*min
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
270 */
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
271
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
272 if (max == min) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
273 m = 0;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
274 b = 0;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
275 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
276 else {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
277 m = (numClasses - 1)/(max - min);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
278 b = m*min;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
279 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
280 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
281
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
282 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
283 * Implements the double to integer lookup.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
284 * @param value The value to map.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
285 * @return The mapped value.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
286 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
287 public int toIndex(double value) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
288 return Double.isNaN(value)
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
289 ? -1
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
290 : Math.min(Math.max(0, (int)Math.round(m*value + b)), numClasses-1);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
291 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
292 } // class IsoClasses
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
293
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
294 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
295 * Internal representation of the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
296 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
297 protected double [] raster;
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
298 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
299 * The width of the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
300 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
301 protected int width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
302
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
303 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
304 * Default constructor. Creates an 0x0 raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
305 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
306 public Raster() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
307 this(new double[0], 0);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
308 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
309
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
310 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
311 * Creates a raster with given values and width.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
312 * @param raster
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
313 * @param width
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
314 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
315 public Raster(double [] raster, int width) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
316 this.raster = raster;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
317 this.width = width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
318 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
319
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
320 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
321 * The width of the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
322 * @return The width.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
323 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
324 public int getWidth() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
325 return width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
326 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
327
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
328 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
329 * The height of the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
330 * @return The height.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
331 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
332 public int getHeight() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
333 return raster.length / width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
334 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
335
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
336 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
337 * The values of the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
338 * @return The values.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
339 */
495
6e8364e766fa Generate JTS geometries of "Horizontalschnitte" correctly.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
340 public double [] getValues() {
6e8364e766fa Generate JTS geometries of "Horizontalschnitte" correctly.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
341 return raster;
6e8364e766fa Generate JTS geometries of "Horizontalschnitte" correctly.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
342 }
6e8364e766fa Generate JTS geometries of "Horizontalschnitte" correctly.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 424
diff changeset
343
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
344 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
345 * Creates an integer representation of this raster using a
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
346 * given value to index transformer.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
347 * @param valueToIndex The transformer to map double to integer values.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
348 * @return The new created integer representation.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
349 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
350 public int [] toIndexed(ValueToIndex valueToIndex) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
351 int [] dst = new int[raster.length];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
352 for (int i = 0; i < raster.length; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
353 dst[i] = valueToIndex.toIndex(raster[i]);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
354 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
355 return dst;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
356 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
357
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
358 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
359 * Creates a new raster by applying a kernel to this raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
360 * Access to the raster is continuous at the border.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
361 * The original raster is not modified.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
362 * @param kernel The kernel to be applied.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
363 * @return The new raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
364 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
365 public Raster create(Kernel kernel) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
366 double [] dst = new double[raster.length];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
367 Raster r = new Raster(dst, width);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
368 r.apply(kernel, continueBorder());
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
369 return r;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
370 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
371
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
372 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
373 * Creates a new raster by applying a kernel to this raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
374 * Access to the raster is given.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
375 * @param kernel The kernel to be applied.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
376 * @param access The access method to the raster.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
377 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
378 public void apply(Kernel kernel, Access access) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
379 int height = getHeight();
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
380 for (int j = 0; j < height; ++j) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
381 int row = j*width;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
382 for (int i = 0; i < width; ++i) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
383 raster[row + i] = kernel.fold(access, i, j);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
384 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
385 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
386 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
387
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
388 /**
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
389 * Returns a continuous access to the raster. Values
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
390 * at the border are repeated til infinity if indices
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
391 * are accessed outside the defined area.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
392 * @return The accessor.
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
393 */
424
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
394 public Access continueBorder() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
395 return new Access() {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
396 int height = getHeight()-1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
397 public double get(int i, int j) {
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
398 if (i < 0) i = 0;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
399 else if (i >= width) i = width-1;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
400 if (j < 0) j = 0;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
401 else if (j > height) j = height;
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
402 return raster[j*width + i];
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
403 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
404 };
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
405 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
406 }
801
d766fe2d917a More javadoc.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 798
diff changeset
407 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org