Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentDensity.java @ 7988:5acaf44062b5 facet-metadata
Updated meta data in facets.
author | Raimund Renkert <rrenkert@intevation.de> |
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date | Wed, 02 Jul 2014 12:31:57 +0200 |
parents | 52c364813cb1 |
children | 41d9014bfa02 |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.artifacts.model.minfo; |
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10 |
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11 import java.io.Serializable; |
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12 |
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13 import java.util.ArrayList; |
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14 import java.util.Collections; |
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15 import java.util.HashMap; |
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16 import java.util.List; |
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17 import java.util.Map; |
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18 import java.util.Set; |
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19 import java.util.TreeMap; |
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20 |
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21 import org.apache.log4j.Logger; |
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22 |
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23 import org.dive4elements.artifacts.common.utils.Config; |
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24 |
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25 |
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26 /** Sediment Densities for multiple years. */ |
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27 public class SedimentDensity implements Serializable |
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28 { |
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29 private static final Logger logger = Logger |
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30 .getLogger(SedimentDensity.class); |
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31 |
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32 public static final double DEFAULT_SEDIMNET_DENSITY_FACTOR = 1.9; |
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33 |
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34 public static String SEDIMENT_DENSITY_FACTOR_XPATH = |
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35 "/artifact-database/options/sediment-density-factor/text()"; |
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36 |
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37 public static final double SEDIMNET_DENSITY_FACTOR = |
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38 getSedimentDensityFactor(); |
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39 |
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40 private Map<Integer, List<SedimentDensityValue>> densities; |
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41 private List<Integer> years; |
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42 |
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43 |
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44 /** Figures out the sediment density factor from global config. */ |
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45 private static final double getSedimentDensityFactor() { |
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46 |
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47 double factor = DEFAULT_SEDIMNET_DENSITY_FACTOR; |
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48 |
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49 String factorString = |
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50 Config.getStringXPath(SEDIMENT_DENSITY_FACTOR_XPATH); |
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51 |
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52 if (factorString != null) { |
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53 try { |
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54 factor = Double.parseDouble(factorString.trim()); |
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55 } |
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56 catch (NumberFormatException nfe) { |
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57 logger.error(nfe); |
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58 } |
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59 } |
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60 |
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61 logger.info("Sedmiment density factor: " + factor); |
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62 |
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63 return factor; |
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64 } |
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65 |
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66 public SedimentDensity() { |
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67 this.densities = new HashMap<Integer, List<SedimentDensityValue>>(); |
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68 this.years = new ArrayList<Integer>(); |
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69 } |
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70 |
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71 public Map<Integer, List<SedimentDensityValue>> getDensities() { |
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72 return densities; |
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73 } |
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74 |
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75 public void setDensities(Map<Integer, List<SedimentDensityValue>> densities) { |
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76 this.densities = densities; |
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77 } |
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78 |
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79 public void addDensity(double km, double density, int year) { |
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80 |
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81 logger.debug("adding " + year); |
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82 |
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83 Integer key = Integer.valueOf(year); |
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84 |
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85 List<SedimentDensityValue> list = densities.get(key); |
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86 |
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87 if (list == null) { |
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88 list = new ArrayList<SedimentDensityValue>(); |
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89 densities.put(key, list); |
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90 } |
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91 |
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92 list.add(new SedimentDensityValue(km, density, year)); |
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93 |
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94 // XXX: Why do we store a redundant list of years, too? |
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95 // Years are the keys of densities so they can be easily |
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96 // accessed by their key set! |
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97 if (!years.contains(key)) { |
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98 logger.debug("new year"); |
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99 years.add(key); |
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100 } |
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101 } |
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102 |
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103 public List<Integer> getYears() { |
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104 return years; |
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105 } |
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106 |
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107 public void setYears(List<Integer> years) { |
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108 this.years = years; |
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109 } |
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110 |
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111 /** |
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112 * Get the density at year. |
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113 * Measured densities are valid until the next measurement. |
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114 * If no measurement was found 1.8 is returned. |
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115 */ |
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116 public double getDensity(double km, int year) { |
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117 Collections.sort(this.years); |
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118 if (this.years.size() == 1 && years.get(0) <= year) { |
6910 | 119 logger.debug("get density from year " + year + " at km " + km); |
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120 return getDensityAtKm(densities.get(years.get(0)), km); |
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121 } |
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122 if (this.years.size() > 1) { |
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123 for (int i = 0, I = years.size()-1; i < I; i++) { |
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124 int y1 = years.get(i); |
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125 int y2 = years.get(i + 1); |
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126 if (year >= y1 && year < y2) { |
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127 return getDensityAtKm(densities.get(y1), km); |
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128 } |
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129 else if (year >= y2 && i == years.size() -1) { |
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130 return getDensityAtKm(densities.get(y2), km); |
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131 } |
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132 } |
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133 } |
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134 return SEDIMNET_DENSITY_FACTOR; |
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135 } |
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136 |
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137 /** Get (sorted) map of km to density of all years. */ |
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138 public double[][] getAllDensities() |
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139 { |
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140 TreeMap<Double, Double> map = new TreeMap<Double,Double>(); |
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141 for (int year: years) { |
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142 for (SedimentDensityValue sdv: densities.get(year)) { |
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143 map.put(sdv.getKm(), sdv.getDensity()); |
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144 } |
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145 } |
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146 double[][] points = new double[2][map.keySet().size()]; |
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147 int i = 0; |
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148 for (Map.Entry<Double, Double> kmDens: map.entrySet()) { |
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149 points[0][i] = kmDens.getKey(); |
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150 points[1][i] = kmDens.getValue(); |
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151 i++; |
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152 } |
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153 |
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154 return points; |
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155 } |
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156 |
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157 /** Get points km,density (sorted by km), for a given year. */ |
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158 public double[][] getDensities(int year) |
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159 { |
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160 TreeMap<Double, Double> map = new TreeMap<Double,Double>(); |
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161 for (SedimentDensityValue sdv: densities.get(year)) { |
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162 map.put(sdv.getKm(), sdv.getDensity()); |
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163 } |
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164 double[][] points = new double[2][map.keySet().size()]; |
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165 int i = 0; |
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166 for (Map.Entry<Double, Double> kmDens: map.entrySet()) { |
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167 points[0][i] = kmDens.getKey(); |
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168 points[1][i] = kmDens.getValue(); |
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169 i++; |
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170 } |
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171 |
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172 return points; |
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173 } |
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174 |
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175 /** Get value at km, interpolated. */ |
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176 private double getDensityAtKm( |
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177 List<SedimentDensityValue> values, |
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178 double km |
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179 ) { |
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180 SedimentDensityValue prev = null; |
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181 SedimentDensityValue next = null; |
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182 for (SedimentDensityValue sdv: values) { |
6910 | 183 logger.debug("year: " + sdv.getYear()); |
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184 if (Math.abs(sdv.getKm() - km) < 0.00001) { |
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185 return prev.getDensity(); |
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186 } |
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187 if (sdv.getKm() > km) { |
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188 next = sdv; |
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189 break; |
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190 } |
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191 prev = sdv; |
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192 } |
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193 return spline(prev, next, km); |
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194 } |
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195 |
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196 /** Linearly interpolate between density values. */ |
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197 private static double spline( |
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198 SedimentDensityValue prev, |
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199 SedimentDensityValue next, |
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200 double km |
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201 ) { |
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202 if (prev == null && next == null) { |
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203 logger.warn("prev and next are null -> NaN"); |
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204 return Double.NaN; |
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205 } |
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206 |
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207 if (prev == null) return next.getDensity(); |
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208 if (next == null) return prev.getDensity(); |
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209 |
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210 // XXX: This is no spline interpolation! |
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211 double lower = prev.getKm(); |
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212 double upper = next.getKm(); |
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213 double upperDensity = next.getDensity(); |
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214 double lowerDensity = prev.getDensity(); |
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215 |
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216 double m = (upperDensity - lowerDensity)/(upper - lower); |
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217 double b = lowerDensity - (m * lower); |
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218 return m * km + b; |
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219 } |
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220 |
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221 |
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222 /** If multiple values for same year and station are found, |
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223 * build and store average, dismiss multiple values. */ |
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224 public void cleanUp() { |
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225 Set<Integer> keys = densities.keySet(); |
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226 // Walk over years |
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227 for (Integer key : keys) { |
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228 List<SedimentDensityValue> list = densities.get(key); |
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229 if (list.size() == 0) { |
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230 return; |
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231 } |
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232 List<SedimentDensityValue> cleaned = |
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233 new ArrayList<SedimentDensityValue>(); |
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234 double prevkm = list.get(0).getKm(); |
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235 int counter = 0; |
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236 double sum = 0d; |
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237 for (SedimentDensityValue value : list) { |
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238 // Apparently we can assume that values are ordered by km. |
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239 if (value.getKm() == prevkm) { |
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240 sum += value.getDensity(); |
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241 counter++; |
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242 } |
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243 else { |
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244 cleaned.add(new SedimentDensityValue( |
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245 prevkm, |
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246 sum / counter, |
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247 value.getYear())); |
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248 sum = value.getDensity(); |
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249 counter = 1; |
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250 } |
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251 prevkm = value.getKm(); |
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252 } |
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253 this.densities.put(key, cleaned); |
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254 } |
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255 } |
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256 } |
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257 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |