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.junit.Assert.assertSame;
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5 | import static org.junit.Assert.assertTrue;
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6 |
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7 | import org.junit.BeforeClass;
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8 | import org.junit.Rule;
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9 | import org.junit.Test;
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10 | import org.openstreetmap.josm.data.coor.EastNorth;
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11 | import org.openstreetmap.josm.data.coor.LatLon;
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12 | import org.openstreetmap.josm.testutils.JOSMTestRules;
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13 |
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14 | import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
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15 |
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16 | /**
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17 | * Unit tests for the Swiss projection grid.
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18 | */
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19 | public class SwissGridTest {
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20 | private static final String SWISS_EPSG_CODE = "EPSG:21781";
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21 | private boolean debug = false;
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22 |
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23 | /**
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24 | * Setup test.
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25 | */
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26 | @Rule
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27 | @SuppressFBWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")
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28 | public JOSMTestRules test = new JOSMTestRules().projectionNadGrids().platform();
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29 |
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30 | /**
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31 | * Setup test.
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32 | */
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33 | @BeforeClass
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34 | public static void setUp() {
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35 | ProjectionRegistry.setProjection(Projections.getProjectionByCode(SWISS_EPSG_CODE)); // Swiss grid
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36 | }
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37 |
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38 | // CHECKSTYLE.OFF: LineLength
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39 | // CHECKSTYLE.OFF: SingleSpaceSeparator
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40 |
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41 | /**
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42 | * source: https://www.swisstopo.admin.ch/content/swisstopo-internet/en/topics/survey/reference-systems/projections/_jcr_content/contentPar/tabs/items/dokumente_publikatio/tabPar/downloadlist/downloadItems/463_1459341821844.download/refsyse.pdf
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43 | */
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44 | ProjData[] data = {
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45 | new ProjData("Zimmerwald", d(7, 27, 54.983506), d(46, 52, 37.540562), 947.149, 602030.680, 191775.030, 897.915),
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46 | new ProjData("Chrischona", d(7, 40, 6.983077), d(47, 34, 1.385301), 504.935, 617306.300, 268507.300, 456.064),
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47 | new ProjData("Pfaender", d(9, 47, 3.697723), d(47, 30, 55.172797), 1089.372, 776668.105, 265372.681, 1042.624),
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48 | new ProjData("La Givrine", d(6, 6, 7.326361), d(46, 27, 14.690021), 1258.274, 497313.292, 145625.438, 1207.434),
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49 | new ProjData("Monte Generoso", d(9, 1, 16.389053), d(45, 55, 45.438020), 1685.027, 722758.810, 87649.670, 1636.600) };
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50 |
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51 | // CHECKSTYLE.ON: SingleSpaceSeparator
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52 | // CHECKSTYLE.ON: LineLength
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53 |
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54 | private double d(double deg, double min, double sec) {
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55 | return deg + min / 60. + sec / 3600.;
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56 | }
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57 |
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58 | private static class ProjData {
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59 | public String name;
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60 | public LatLon ll;
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61 | public EastNorth en;
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62 |
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63 | ProjData(String name, double lon, double lat, double h1, double x, double y, double h2) {
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64 | this.name = name;
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65 | ll = new LatLon(lat, lon);
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66 | en = new EastNorth(x, y);
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67 | }
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68 | }
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69 |
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70 | private static final double EPSILON_ACCURATE = 0.05;
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71 |
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72 | private void projReferenceTest(final double epsilon) {
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73 | Projection swiss = Projections.getProjectionByCode("EPSG:21781"); // Swiss grid
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74 | StringBuilder errs = new StringBuilder();
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75 | for (ProjData pd : data) {
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76 | EastNorth en2 = swiss.latlon2eastNorth(pd.ll);
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77 | if (Math.abs(pd.en.east() - en2.east()) > epsilon || Math.abs(pd.en.north() - en2.north()) > epsilon) {
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78 | errs.append(String.format("%s should be: %s but is: %s%n", pd.name, pd.en, en2));
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79 | }
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80 | }
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81 | assertSame(errs.toString(), errs.length(), 0);
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82 | }
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83 |
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84 | /**
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85 | * Test projection accuracy.
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86 | */
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87 | @Test
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88 | public void testProjReferenceTestAccurate() {
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89 | projReferenceTest(EPSILON_ACCURATE);
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90 | }
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91 |
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92 | /**
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93 | * Unit test A: lat/lon => east/north
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94 | */
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95 | @Test
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96 | public void testAlatlon2eastNorth() {
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97 | LatLon ll = new LatLon(46.518, 6.567);
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98 | EastNorth en = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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99 | if (debug) {
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100 | System.out.println(en);
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101 | }
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102 | assertTrue("Lausanne", Math.abs(en.east() - 533112.13) < 0.1);
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103 | assertTrue("Lausanne", Math.abs(en.north() - 152227.35) < 0.1);
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104 |
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105 | ll = new LatLon(47.78, 8.58);
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106 | en = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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107 | if (debug) {
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108 | System.out.println(en);
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109 | }
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110 | assertTrue("Schafouse", Math.abs(en.east() - 685542.97) < 0.1);
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111 | assertTrue("Schafouse", Math.abs(en.north() - 292783.21) < 0.1);
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112 |
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113 | ll = new LatLon(46.58, 10.48);
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114 | en = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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115 | if (debug) {
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116 | System.out.println(en);
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117 | }
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118 | assertTrue("Grinson", Math.abs(en.east() - 833066.95) < 0.1);
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119 | assertTrue("Grinson", Math.abs(en.north() - 163265.32) < 0.1);
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120 |
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121 | ll = new LatLon(46.0 + 57.0 / 60 + 3.89813884505 / 3600, 7.0 + 26.0 / 60 + 19.076595154147 / 3600);
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122 | en = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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123 | if (debug) {
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124 | System.out.println(en);
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125 | }
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126 | assertTrue("Berne", Math.abs(en.east() - 600000.0) < 0.1);
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127 | assertTrue("Berne", Math.abs(en.north() - 200000.0) < 0.1);
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128 |
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129 | // http://geodesy.geo.admin.ch/reframe/lv03towgs84?easting=700000&northing=100000
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130 | ll = new LatLon(46.04412093223244, 8.730497366167727);
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131 | en = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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132 | if (debug) {
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133 | System.out.println(en);
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134 | }
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135 | assertTrue("Ref", Math.abs(en.east() - 700000.0) < 0.1);
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136 | assertTrue("Ref", Math.abs(en.north() - 100000.0) < 0.1);
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137 | }
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138 |
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139 | /**
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140 | * Unit test B: east/north => lat/lon
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141 | */
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142 | @Test
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143 | public void testBeastNorth2latlon() {
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144 | EastNorth en = new EastNorth(533112.13, 152227.35);
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145 | LatLon ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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146 | if (debug) {
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147 | System.out.println(ll);
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148 | }
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149 | assertTrue("Lausanne", Math.abs(ll.lat() - 46.518) < 0.00001);
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150 | assertTrue("Lausanne", Math.abs(ll.lon() - 6.567) < 0.00001);
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151 |
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152 | en = new EastNorth(685542.97, 292783.21);
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153 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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154 | if (debug) {
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155 | System.out.println(ll);
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156 | }
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157 | assertTrue("Schafouse", Math.abs(ll.lat() - 47.78) < 0.00001);
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158 | assertTrue("Schafouse", Math.abs(ll.lon() - 8.58) < 0.00001);
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159 |
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160 | en = new EastNorth(833066.95, 163265.32);
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161 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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162 | if (debug) {
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163 | System.out.println(ll);
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164 | }
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165 | assertTrue("Grinson", Math.abs(ll.lat() - 46.58) < 0.00001);
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166 | assertTrue("Grinson", Math.abs(ll.lon() - 10.48) < 0.00001);
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167 |
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168 | en = new EastNorth(600000.0, 200000.0);
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169 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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170 | if (debug) {
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171 | System.out.println(ll);
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172 | }
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173 | assertTrue("Berne", Math.abs(ll.lat() - (46.0 + 57.0 / 60 + 3.89813884505 / 3600)) < 0.00001);
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174 | assertTrue("Berne", Math.abs(ll.lon() - (7.0 + 26.0 / 60 + 19.076595154147 / 3600)) < 0.00001);
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175 |
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176 | // http://geodesy.geo.admin.ch/reframe/lv03towgs84?easting=700000&northing=100000
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177 | en = new EastNorth(700000.0, 100000.0);
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178 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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179 | if (debug) {
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180 | System.out.println(ll);
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181 | }
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182 | assertTrue("Ref", Math.abs(ll.lat() - 46.04412093223244) < 0.00001);
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183 | assertTrue("Ref", Math.abs(ll.lon() - 8.730497366167727) < 0.00001);
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184 | }
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185 |
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186 | /**
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187 | * Send and return should have less than 2mm of difference.
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188 | */
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189 | @Test
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190 | public void testCsendandreturn() {
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191 | EastNorth en = new EastNorth(533111.69, 152227.85);
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192 | LatLon ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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193 | EastNorth en2 = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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194 | if (debug) {
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195 | System.out.println(en.east() - en2.east());
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196 | }
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197 | if (debug) {
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198 | System.out.println(en.north() - en2.north());
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199 | }
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200 | assertTrue("Lausanne", Math.abs(en.east() - en2.east()) < 0.002);
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201 | assertTrue("Lausanne", Math.abs(en.north() - en2.north()) < 0.002);
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202 |
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203 | en = new EastNorth(685544.16, 292782.91);
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204 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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205 | en2 = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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206 | if (debug) {
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207 | System.out.println(en.east() - en2.east());
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208 | }
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209 | if (debug) {
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210 | System.out.println(en.north() - en2.north());
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211 | }
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212 | assertTrue("Schafouse", Math.abs(en.east() - en2.east()) < 0.002);
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213 | assertTrue("Schafouse", Math.abs(en.north() - en2.north()) < 0.002);
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214 |
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215 | en = new EastNorth(833068.04, 163265.39);
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216 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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217 | en2 = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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218 | if (debug) {
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219 | System.out.println(en.east() - en2.east());
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220 | }
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221 | if (debug) {
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222 | System.out.println(en.north() - en2.north());
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223 | }
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224 | assertTrue("Grinson", Math.abs(en.east() - en2.east()) < 0.002);
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225 | assertTrue("Grinson", Math.abs(en.north() - en2.north()) < 0.002);
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226 |
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227 | en = new EastNorth(600000.0, 200000.0);
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228 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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229 | en2 = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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230 | if (debug) {
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231 | System.out.println(en.east() - en2.east());
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232 | }
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233 | if (debug) {
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234 | System.out.println(en.north() - en2.north());
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235 | }
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236 | assertTrue("Berne", Math.abs(en.east() - en2.east()) < 0.002);
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237 | assertTrue("Berne", Math.abs(en.north() - en2.north()) < 0.002);
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238 |
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239 | en = new EastNorth(700000.0, 100000.0);
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240 | ll = ProjectionRegistry.getProjection().eastNorth2latlon(en);
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241 | en2 = ProjectionRegistry.getProjection().latlon2eastNorth(ll);
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242 | if (debug) {
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243 | System.out.println(en.east() - en2.east());
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244 | }
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245 | if (debug) {
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246 | System.out.println(en.north() - en2.north());
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247 | }
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248 | assertTrue("Ref", Math.abs(en.east() - en2.east()) < 0.002);
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249 | assertTrue("Ref", Math.abs(en.north() - en2.north()) < 0.002);
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250 | }
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251 | }
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