1 | //License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.projection;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.GridBagLayout;
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7 | import java.util.Collection;
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8 | import java.util.Collections;
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9 |
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10 | import javax.swing.JComboBox;
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11 | import javax.swing.JLabel;
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12 | import javax.swing.JPanel;
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13 |
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14 | import org.openstreetmap.josm.data.Bounds;
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15 | import org.openstreetmap.josm.data.coor.EastNorth;
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16 | import org.openstreetmap.josm.data.coor.LatLon;
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17 | import org.openstreetmap.josm.data.projection.Projection;
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18 | import org.openstreetmap.josm.data.projection.Ellipsoid;
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19 | import org.openstreetmap.josm.tools.GBC;
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20 | import org.openstreetmap.josm.tools.ImageProvider;
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21 |
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22 | /**
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23 | * This class implements the Lambert Conic Conform 9 Zones projection as specified by the IGN
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24 | * in this document http://professionnels.ign.fr/DISPLAY/000/526/700/5267002/transformation.pdf
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25 | * @author Pieren
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26 | *
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27 | */
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28 | public class LambertCC9Zones implements Projection, ProjectionSubPrefs {
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29 |
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30 | /**
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31 | * Lambert 9 zones projection exponents
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32 | */
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33 | public static final double n[] = { 0.6691500006885269, 0.682018118346418, 0.6946784863203991, 0.7071272481559119,
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34 | 0.7193606118567315, 0.7313748510399917, 0.7431663060711892, 0.7547313851789208, 0.7660665655489937};
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35 |
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36 | /**
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37 | * Lambert 9 zones projection constants
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38 | */
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39 | public static final double c[] = { 1.215363305807804E7, 1.2050261119223533E7, 1.195716926884592E7, 1.18737533925172E7,
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40 | 1.1799460698022118E7, 1.17337838820243E7, 1.16762559948139E7, 1.1626445901183508E7, 1.1583954251630554E7};
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41 |
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42 | /**
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43 | * Lambert 9 zones false east
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44 | */
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45 | public static final double Xs = 1700000;
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46 |
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47 | /**
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48 | * Lambert 9 zones false north
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49 | */
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50 | public static final double Ys[] = { 8293467.503439436, 9049604.665107645, 9814691.693461388, 1.0588107871787189E7,
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51 | 1.1369285637569271E7, 1.2157704903382052E7, 1.2952888086405803E7, 1.3754395745267643E7, 1.4561822739114787E7};
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52 |
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53 | /**
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54 | * Lambert I, II, III, and IV longitudinal offset to Greenwich meridian
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55 | */
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56 | public static final double lg0 = 0.04079234433198; // 2deg20'14.025"
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57 |
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58 | /**
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59 | * precision in iterative schema
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60 | */
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61 |
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62 | public static final double epsilon = 1e-12;
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63 |
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64 | /**
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65 | * France is divided in 9 Lambert projection zones, CC42 to CC50.
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66 | */
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67 | public static final double cMaxLatZonesRadian = Math.toRadians(51.1);
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68 |
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69 | public static final double cMinLatZonesDegree = 41.0;
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70 | public static final double cMinLatZonesRadian = Math.toRadians(cMinLatZonesDegree);
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71 |
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72 | public static final double cMinLonZonesRadian = Math.toRadians(-5.0);
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73 |
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74 | public static final double cMaxLonZonesRadian = Math.toRadians(10.2);
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75 |
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76 | public static final double lambda0 = Math.toRadians(3);
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77 | public static final double e = Ellipsoid.GRS80.e; // but in doc=0.08181919112
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78 | public static final double e2 =Ellipsoid.GRS80.e2;
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79 | public static final double a = Ellipsoid.GRS80.a;
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80 |
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81 | public static final double cMaxOverlappingZones = 1.5;
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82 |
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83 | public static final int DEFAULT_ZONE = 0;
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84 |
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85 | private static int layoutZone = DEFAULT_ZONE;
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86 |
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87 | private double L(double phi, double e) {
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88 | double sinphi = Math.sin(phi);
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89 | return (0.5*Math.log((1+sinphi)/(1-sinphi))) - e/2*Math.log((1+e*sinphi)/(1-e*sinphi));
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90 | }
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91 |
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92 | /**
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93 | * @param p WGS84 lat/lon (ellipsoid GRS80) (in degree)
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94 | * @return eastnorth projection in Lambert Zone (ellipsoid Clark)
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95 | */
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96 | public EastNorth latlon2eastNorth(LatLon p) {
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97 | double lt = Math.toRadians(p.lat());
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98 | double lg = Math.toRadians(p.lon());
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99 | if (lt >= cMinLatZonesRadian && lt <= cMaxLatZonesRadian && lg >= cMinLonZonesRadian && lg <= cMaxLonZonesRadian)
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100 | return ConicProjection(lt, lg, layoutZone);
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101 | return ConicProjection(lt, lg, 0);
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102 | }
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103 |
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104 | /**
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105 | *
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106 | * @param lat latitude in grad
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107 | * @param lon longitude in grad
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108 | * @param nz Lambert CC zone number (from 1 to 9) - 1 !
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109 | * @return EastNorth projected coordinates in meter
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110 | */
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111 | private EastNorth ConicProjection(double lat, double lon, int nz) {
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112 | double R = c[nz]*Math.exp(-n[nz]*L(lat,e));
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113 | double gamma = n[nz]*(lon-lambda0);
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114 | double X = Xs + R*Math.sin(gamma);
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115 | double Y = Ys[nz] + -R*Math.cos(gamma);
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116 | return new EastNorth(X, Y);
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117 | }
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118 |
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119 | public LatLon eastNorth2latlon(EastNorth p) {
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120 | return Geographic(p, layoutZone);
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121 | }
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122 |
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123 | private LatLon Geographic(EastNorth ea, int nz) {
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124 | double R = Math.sqrt(Math.pow(ea.getX()-Xs,2)+Math.pow(ea.getY()-Ys[nz], 2));
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125 | double gamma = Math.atan((ea.getX()-Xs)/(Ys[nz]-ea.getY()));
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126 | double lon = lambda0+gamma/n[nz];
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127 | double latIso = (-1/n[nz])*Math.log(Math.abs(R/c[nz]));
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128 | double lat = Ellipsoid.GRS80.latitude(latIso, e, epsilon);
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129 | return new LatLon(Math.toDegrees(lat), Math.toDegrees(lon));
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130 | }
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131 |
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132 | @Override public String toString() {
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133 | return tr("Lambert CC9 Zone (France)");
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134 | }
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135 |
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136 | public static int north2ZoneNumber(double north) {
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137 | int nz = (int)(north /1000000) - 1;
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138 | if (nz < 0) return 0;
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139 | else if (nz > 8) return 8;
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140 | else return nz;
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141 | }
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142 |
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143 | public String toCode() {
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144 | return "EPSG:"+(3942+layoutZone); //CC42 is EPSG:3942 (up to EPSG:3950 for CC50)
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145 | }
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146 |
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147 | public String getCacheDirectoryName() {
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148 | return "lambert";
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149 | }
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150 |
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151 | /**
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152 | * Returns the default zoom scale in pixel per degree ({@see #NavigatableComponent#scale}))
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153 | */
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154 | public double getDefaultZoomInPPD() {
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155 | // this will set the map scaler to about 1000 m (in default scale, 1 pixel will be 10 meters)
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156 | return 10.0;
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157 | }
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158 |
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159 | public Bounds getWorldBoundsLatLon()
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160 | {
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161 | double medLatZone = cMinLatZonesDegree + (layoutZone+1);
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162 | return new Bounds(
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163 | new LatLon(medLatZone - 1.0 - cMaxOverlappingZones, -4.9),
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164 | new LatLon(medLatZone + 1.0 + cMaxOverlappingZones, 10.2));
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165 | }
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166 |
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167 | public int getLayoutZone() {
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168 | return layoutZone;
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169 | }
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170 |
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171 | private static String[] lambert9zones = {
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172 | tr("{0} ({1} to {2} degrees)", 1,41,43),
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173 | tr("{0} ({1} to {2} degrees)", 2,42,44),
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174 | tr("{0} ({1} to {2} degrees)", 3,43,45),
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175 | tr("{0} ({1} to {2} degrees)", 4,44,46),
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176 | tr("{0} ({1} to {2} degrees)", 5,45,47),
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177 | tr("{0} ({1} to {2} degrees)", 6,46,48),
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178 | tr("{0} ({1} to {2} degrees)", 7,47,49),
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179 | tr("{0} ({1} to {2} degrees)", 8,48,50),
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180 | tr("{0} ({1} to {2} degrees)", 9,49,51)
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181 | };
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182 |
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183 | public void setupPreferencePanel(JPanel p) {
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184 | JComboBox prefcb = new JComboBox(lambert9zones);
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185 |
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186 | prefcb.setSelectedIndex(layoutZone);
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187 | p.setLayout(new GridBagLayout());
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188 | p.add(new JLabel(tr("Lambert CC Zone")), GBC.std().insets(5,5,0,5));
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189 | p.add(GBC.glue(1, 0), GBC.std().fill(GBC.HORIZONTAL));
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190 | /* Note: we use component position 2 below to find this again */
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191 | p.add(prefcb, GBC.eop().fill(GBC.HORIZONTAL));
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192 | p.add(new JLabel(ImageProvider.get("data/projection", "LambertCC9Zones.png")), GBC.eol().fill(GBC.HORIZONTAL));
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193 | p.add(GBC.glue(1, 1), GBC.eol().fill(GBC.BOTH));
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194 | }
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195 |
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196 | public Collection<String> getPreferences(JPanel p) {
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197 | Object prefcb = p.getComponent(2);
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198 | if(!(prefcb instanceof JComboBox))
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199 | return null;
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200 | layoutZone = ((JComboBox)prefcb).getSelectedIndex();
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201 | if (layoutZone == 0) {
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202 | layoutZone = layoutZone +1 -1;
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203 | }
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204 | return Collections.singleton(Integer.toString(layoutZone+1));
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205 | }
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206 |
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207 | public void setPreferences(Collection<String> args)
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208 | {
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209 | layoutZone = DEFAULT_ZONE;
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210 | if (args != null) {
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211 | try {
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212 | for(String s : args)
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213 | {
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214 | layoutZone = Integer.parseInt(s)-1;
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215 | if(layoutZone < 0 || layoutZone > 8) {
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216 | layoutZone = DEFAULT_ZONE;
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217 | }
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218 | break;
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219 | }
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220 | } catch(NumberFormatException e) {}
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221 | }
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222 | if (layoutZone == 0) {
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223 | layoutZone = layoutZone +1 -1;
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224 | }
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225 | }
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226 |
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227 | public Collection<String> getPreferencesFromCode(String code)
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228 | {
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229 | //zone 1=CC42=EPSG:3942 up to zone 9=CC50=EPSG:3950
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230 | if (code.startsWith("EPSG:39") && code.length() == 9) {
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231 | try {
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232 | String zonestring = code.substring(5,4);
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233 | int zoneval = Integer.parseInt(zonestring)-3942;
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234 | if(zoneval >= 0 && zoneval <= 8)
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235 | return Collections.singleton(zonestring);
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236 | } catch(NumberFormatException e) {}
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237 | }
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238 | return null;
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239 | }
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240 | }
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