Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/fixings/FixATWriter.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
rev   line source
5863
4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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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.exports.fixings;
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10
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11 import org.dive4elements.artifacts.CallMeta;
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12
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13 import org.dive4elements.river.artifacts.math.fitting.Function;
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14
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15 import org.dive4elements.river.artifacts.model.Parameters;
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16
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17 import org.dive4elements.river.artifacts.resources.Resources;
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18
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19 import org.dive4elements.river.exports.ATWriter;
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20
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21 import java.io.IOException;
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22 import java.io.PrintWriter;
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23 import java.io.Writer;
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24
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25 import java.util.Locale;
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26
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27 import org.apache.log4j.Logger;
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28
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29 /** Export Fixation Analysis Results to AT. */
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30 public class FixATWriter
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31 {
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32 /** Private logger. */
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33 private static Logger log = Logger.getLogger(FixATWriter.class);
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34
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35 public static final String I18N_HEADER_KEY =
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36 "fix.export.at.header";
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37
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38 public static final String I18N_HEADER_DEFAULT =
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39 "Exported fixings discharge curve for {0} {0}-km: {1}";
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40
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41 public static final String [] Q_MAX_COLUMN = new String [] { "max_q" };
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42
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43 private static final int MAX_ITERATIONS = 10000;
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44 private static final double EPSILON = 1e-8;
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45 private static final double MIN_Q = 1e-4;
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46
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47 protected Function function;
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48 protected Parameters parameters;
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49
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50 public FixATWriter() {
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51 }
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52
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53 public FixATWriter(Function function, Parameters parameters) {
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54 this.function = function;
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55 this.parameters = parameters;
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56 }
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57
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58 public void write(
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59 Writer writer,
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60 CallMeta meta,
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61 String river,
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62 double km
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63 )
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64 throws IOException {
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65 PrintWriter out = new PrintWriter(writer);
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66 printHeader(out, meta, river, km);
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67
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68 double [] coeffs = parameters.interpolate(
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69 "km", km, function.getParameterNames());
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70
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71 double [] qMax = parameters.interpolate(
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72 "km", km, Q_MAX_COLUMN);
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73
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74 if (coeffs == null || qMax == null) {
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75 log.debug("No data found at km " + km + ".");
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76 return;
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77 }
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78
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79 org.dive4elements.river.artifacts.math.Function funcInst =
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80 function.instantiate(coeffs);
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81
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82 // Increase Q max about 5%.
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83 qMax[0] += Math.abs(qMax[0])*0.05;
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84
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85 double wMax = funcInst.value(qMax[0]);
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86
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87 if (Double.isNaN(wMax) || wMax < 0d) {
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88 log.debug("function '" + function.getName() +
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89 "' eval failed at " + wMax);
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90 return;
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91 }
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92
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93 Function inverse = function.getInverse();
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94
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95 org.dive4elements.river.artifacts.math.Function invInst =
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96 inverse.instantiate(coeffs);
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97
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98 double wMin = minW(invInst, wMax, qMax[0]);
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99
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100 double wMinCM = wMin * 100d;
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101 double wMaxCM = wMax * 100d;
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102
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103 int wRow = ((int)wMinCM / 10) * 10;
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104
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105 if ((wMinCM - (int)wMinCM) > 0d) {
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106 wMinCM = (int)wMinCM + 1d;
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107 }
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108
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109 double w = wMinCM / 100.0;
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110
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111 int wcm = ((int)wMinCM) % 10;
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112
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113 if (log.isDebugEnabled()) {
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114 log.debug("wMinCM: " + wMinCM);
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115 log.debug("wMaxCM: " + wMaxCM);
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116 log.debug("wcm: " + wcm);
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117 }
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118
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119 out.printf(Locale.US, "%8d", wRow);
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120
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121 if (wcm > 0) {
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122 int rest = 10 - wcm;
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123 while (rest-- > 0) {
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124 out.print(ATWriter.EMPTY);
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125 }
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126 }
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127
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128 for (;;) {
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129 while (wcm++ < 10) {
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130 if (w > wMax) {
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131 break;
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132 }
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133 double q = invInst.value(w);
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134 if (Double.isNaN(w)) {
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135 out.print(ATWriter.EMPTY);
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136 }
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137 else {
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138 ATWriter.printQ(out, q);
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139 }
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140 w += 0.01d;
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141 }
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142 out.println();
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143 if (w > wMax) {
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144 break;
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145 }
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146 out.printf(Locale.US, "%8d", wRow += 10);
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147 wcm = 0;
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148 }
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149
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150 out.flush();
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151 }
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152
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153 protected void printHeader(
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154 PrintWriter out,
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155 CallMeta meta,
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156 String river,
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157 double km
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158 ) {
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159 out.println(Resources.format(
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160 meta,
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161 I18N_HEADER_KEY,
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162 I18N_HEADER_DEFAULT,
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163 river, km));
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164 }
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165
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166 private static double minW(
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167 org.dive4elements.river.artifacts.math.Function function,
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168 double maxW,
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169 double maxQ
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170 ) {
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171 double stepWidth = 10d;
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172
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173 double lastW = maxW;
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174 double lastQ = maxQ;
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175
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176 for (int i = 0; i < MAX_ITERATIONS; ++i) {
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177 double w = lastW - stepWidth;
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178 double q = function.value(w);
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179
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180 if (Double.isNaN(q) || q > lastQ || q < MIN_Q) {
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181 if (stepWidth < EPSILON) {
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182 break;
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183 }
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184 stepWidth *= 0.5d;
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185 continue;
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186 }
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187
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188 lastW = w;
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189 lastQ = q;
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190 }
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191
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192 return lastW;
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193 }
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194 }
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195 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org