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package dk.daoas.fulddaekning; |
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public class GeoPoint { |
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public double latitude; |
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public double longitude; |
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public GeoPoint() { //Default |
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} |
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public GeoPoint(double lat, double lng) { //Default |
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latitude=lat; |
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longitude=lng; |
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} |
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public static double beregnAfstand(GeoPoint point1, GeoPoint point2) { |
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//(62.8*sqrt(3.1*(Power(a.Latitude-x.Latitude,2)+Power(a.Longitude-x.Longitude,2)))) as Afstand, |
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double pwrLat = Math.pow(point1.latitude - point2.latitude, 2); |
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double pwrLng = Math.pow(point1.longitude - point2.longitude, 2); |
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return 62.8 * Math.sqrt( 3.1 * (pwrLat + pwrLng) ); |
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} |
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|
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//Latitude (horizonal), longitude(vertical) so |
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// 1 degree latitude is ~ 111320 meters, since the distance between the horizonal lines is always the same |
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// 1 degree longitude is ~111320 meters at equator but gets shorter as we get closer to the poles. |
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// so 1 degree longitude is 64.5 km at denmarks southern point (gedser=54.55,11.95) |
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// and is 59.4km at northern point (skagen = 57.75,10.65) |
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public static double kmToLatitude(double km) { |
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return km / 111.320 ; |
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} |
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public static double kmToLongitude( double km) {//denne er kun ca |
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return km / 62.0; |
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} |
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} |