1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 |
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7 | var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
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8 |
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9 | var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
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10 |
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11 | exports.oneDegreeOfLongitude = oneDegreeOfLongitude;
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12 | exports.oneDegreeOfLatitude = oneDegreeOfLatitude;
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13 | exports.geocentricLatitudeDifference = geocentricLatitudeDifference;
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14 | exports.approxAngularDistance = approxAngularDistance;
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15 | exports.approxLinearDistance = approxLinearDistance;
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16 |
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17 | function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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18 |
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19 |
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29 |
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30 |
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31 |
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32 |
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33 |
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34 | var Ellipsoid = exports.Ellipsoid = function () {
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35 | |
36 |
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37 |
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38 |
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39 | function Ellipsoid(radius, flat) {
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40 | _classCallCheck(this, Ellipsoid);
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41 |
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42 | this.radius = radius;
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43 | this.flat = flat;
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44 | }
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45 |
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46 |
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47 |
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48 |
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49 | _createClass(Ellipsoid, [{
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50 | key: "A",
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51 | value: function A() {
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52 | return this.radius;
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53 | }
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54 |
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55 |
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56 |
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57 | }, {
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58 | key: "B",
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59 | value: function B() {
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60 | return this.radius * (1 - this.flat);
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61 | }
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62 |
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63 |
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64 |
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65 | }, {
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66 | key: "eccentricity",
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67 | value: function eccentricity() {
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68 | return Math.sqrt((2 - this.flat) * this.flat);
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69 | }
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70 |
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71 | |
72 |
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73 |
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74 |
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75 |
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76 |
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77 |
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78 |
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79 |
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80 |
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81 |
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82 | }, {
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83 | key: "parallaxConstants",
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84 | value: function parallaxConstants(φ, h) {
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85 | var boa = 1 - this.flat;
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86 | var su = Math.sin(Math.atan(boa * Math.tan(φ)));
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87 | var cu = Math.cos(Math.atan(boa * Math.tan(φ)));
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88 | var s = Math.sin(φ);
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89 | var c = Math.cos(φ);
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90 | var hoa = h * 1e-3 / this.radius;
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91 |
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92 | return [su * boa + hoa * s, cu + hoa * c];
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93 | }
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94 |
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95 | |
96 |
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97 |
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98 |
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99 |
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100 |
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101 |
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102 |
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103 | }, {
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104 | key: "rho",
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105 | value: function rho(φ) {
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106 |
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107 | return 0.9983271 + 0.0016764 * Math.cos(2 * φ) - 0.0000035 * Math.cos(4 * φ);
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108 | }
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109 |
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110 | |
111 |
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112 |
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113 |
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114 |
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115 |
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116 |
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117 |
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118 |
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119 |
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120 | }, {
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121 | key: "radiusAtLatitude",
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122 | value: function radiusAtLatitude(φ) {
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123 | var s = Math.sin(φ);
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124 | var c = Math.cos(φ);
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125 | return this.A() * c / Math.sqrt(1 - (2 - this.flat) * this.flat * s * s);
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126 | }
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127 |
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128 | |
129 |
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130 |
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131 |
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132 |
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133 |
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134 |
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135 |
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136 |
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137 | }, {
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138 | key: "radiusOfCurvature",
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139 | value: function radiusOfCurvature(φ) {
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140 | var s = Math.sin(φ);
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141 | var e2 = (2 - this.flat) * this.flat;
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142 | return this.A() * (1 - e2) / Math.pow(1 - e2 * s * s, 1.5);
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143 | }
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144 |
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145 | |
146 |
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147 |
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148 |
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149 |
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150 |
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152 |
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153 |
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154 |
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155 |
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156 |
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157 |
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158 |
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159 | }, {
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160 | key: "distance",
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161 | value: function distance(c1, c2) {
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162 |
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163 | var _sincos = sincos2((c1.lat + c2.lat) / 2),
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164 | _sincos2 = _slicedToArray(_sincos, 2),
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165 | s2f = _sincos2[0],
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166 | c2f = _sincos2[1];
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167 |
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168 | var _sincos3 = sincos2((c1.lat - c2.lat) / 2),
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169 | _sincos4 = _slicedToArray(_sincos3, 2),
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170 | s2g = _sincos4[0],
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171 | c2g = _sincos4[1];
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172 |
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173 | var _sincos5 = sincos2((c1.lon - c2.lon) / 2),
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174 | _sincos6 = _slicedToArray(_sincos5, 2),
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175 | s2λ = _sincos6[0],
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176 | c2λ = _sincos6[1];
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177 |
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178 | var s = s2g * c2λ + c2f * s2λ;
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179 | var c = c2g * c2λ + s2f * s2λ;
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180 | var ω = Math.atan(Math.sqrt(s / c));
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181 | var r = Math.sqrt(s * c) / ω;
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182 | var d = 2 * ω * this.radius;
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183 | var h1 = (3 * r - 1) / (2 * c);
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184 | var h2 = (3 * r + 1) / (2 * s);
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185 | return d * (1 + this.flat * (h1 * s2f * c2g - h2 * c2f * s2g));
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186 | }
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187 | }]);
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188 |
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189 | return Ellipsoid;
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190 | }();
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191 |
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192 |
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193 |
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194 |
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195 | var Earth76 = exports.Earth76 = new Ellipsoid(6378.14, 1 / 298.257);
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196 |
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197 |
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198 |
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199 |
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200 |
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201 |
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202 |
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203 | var RotationRate1996_5 = exports.RotationRate1996_5 = 7.292114992e-5;
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204 |
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205 |
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206 |
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207 |
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208 |
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209 |
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210 |
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211 |
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212 |
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213 |
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214 |
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215 | function oneDegreeOfLongitude(rp) {
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216 | return rp * Math.PI / 180;
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217 | }
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218 |
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219 |
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220 |
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221 |
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222 |
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223 |
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224 |
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225 |
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226 |
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227 |
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228 |
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229 | function oneDegreeOfLatitude(rm) {
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230 | return rm * Math.PI / 180;
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231 | }
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232 |
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233 |
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234 |
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235 |
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236 |
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237 |
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238 |
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239 |
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240 |
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241 | function geocentricLatitudeDifference(φ) {
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242 |
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243 |
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244 |
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245 | return (692.73 * Math.sin(2 * φ) - 1.16 * Math.sin(4 * φ)) * Math.PI / (180 * 3600);
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246 | }
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247 |
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248 |
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249 |
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250 |
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251 |
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252 |
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253 |
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254 | var Coord =
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255 |
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256 |
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257 |
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258 |
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259 | exports.Coord = function Coord() {
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260 | var lat = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
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261 | var lon = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
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262 |
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263 | _classCallCheck(this, Coord);
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264 |
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265 | this.lat = lat;
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266 | this.lon = lon;
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267 | };
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268 |
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269 |
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270 |
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271 |
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272 |
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273 |
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274 |
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275 |
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276 |
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277 |
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278 |
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279 |
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280 |
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281 | function approxAngularDistance(p1, p2) {
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282 | var s1 = Math.sin(p1.lat);
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283 | var c1 = Math.cos(p1.lat);
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284 | var s2 = Math.sin(p2.lat);
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285 | var c2 = Math.cos(p2.lat);
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286 | return s1 * s2 + c1 * c2 * Math.cos(p1.lon - p2.lon);
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287 | }
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288 |
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289 |
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290 |
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291 |
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292 |
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293 |
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294 |
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295 |
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296 |
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297 |
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298 | function approxLinearDistance(d) {
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299 | return 6371 * d;
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300 | }
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301 |
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302 |
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303 |
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304 |
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305 | function sincos2(x) {
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306 | var s = Math.sin(x);
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307 | var c = Math.cos(x);
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308 | return [s * s, c * c];
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309 | }
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310 |
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311 | exports.default = {
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312 | Ellipsoid: Ellipsoid,
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313 | Earth76: Earth76,
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314 | RotationRate1996_5: RotationRate1996_5,
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315 | oneDegreeOfLongitude: oneDegreeOfLongitude,
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316 | oneDegreeOfLatitude: oneDegreeOfLatitude,
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317 | geocentricLatitudeDifference: geocentricLatitudeDifference,
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318 | Coord: Coord,
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319 | approxAngularDistance: approxAngularDistance,
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320 | approxLinearDistance: approxLinearDistance
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321 | }; |
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