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2014/10/15 ¤U¤È 10:10:55
iphone Programming Glossary: lat1how to calculate two coordinates distance in objective c? http://stackoverflow.com/questions/1980898/how-to-calculate-two-coordinates-distance-in-objective-c result is different with the google map calculation result. below provided the code i did double GetDistance double lat1 long1 double lng1 la2 double lat2 long2 double lng2 NSLog @ latitude 1 .7f longitude1 .7f latitude2 .7f longtitude2 .7f.. double lng1 la2 double lat2 long2 double lng2 NSLog @ latitude 1 .7f longitude1 .7f latitude2 .7f longtitude2 .7f lat1 lng1 lat2 lng2 double radLat1 self rad lat1 double radLat2 self rad lat2 double a radLat1 radLat2 double b self rad lng1.. lng2 NSLog @ latitude 1 .7f longitude1 .7f latitude2 .7f longtitude2 .7f lat1 lng1 lat2 lng2 double radLat1 self rad lat1 double radLat2 self rad lat2 double a radLat1 radLat2 double b self rad lng1 self rad lng2 double s 2 asin sqrt pow sin..
How do I calculate the distance between two points of latitude and longitude? http://stackoverflow.com/questions/2652167/how-do-i-calculate-the-distance-between-two-points-of-latitude-and-longitude coordinates latitude longitude share improve this question CLLocation location1 CLLocation alloc initWithLatitude lat1 longitude long1 CLLocation location2 CLLocation alloc initWithLatitude lat2 longitude long2 NSLog @ Distance i meters f..
CLLocation Category for Calculating Bearing w/ Haversine function http://stackoverflow.com/questions/3925942/cllocation-category-for-calculating-bearing-w-haversine-function radians 180 M_PI @implementation CLLocation Bearing double bearingToLocation CLLocation destinationLocation double lat1 DegreesToRadians self.coordinate.latitude double lon1 DegreesToRadians self.coordinate.longitude double lat2 DegreesToRadians.. destinationLocation.coordinate.longitude double dLon lon2 lon1 double y sin dLon cos lat2 double x cos lat1 sin lat2 sin lat1 cos lat2 cos dLon double radiansBearing atan2 y x return RadiansToDegrees radiansBearing iphone mapkit.. double dLon lon2 lon1 double y sin dLon cos lat2 double x cos lat1 sin lat2 sin lat1 cos lat2 cos dLon double radiansBearing atan2 y x return RadiansToDegrees radiansBearing iphone mapkit core location cllocation..
http://stackoverflow.com/questions/4130821/iphone-compass-gps-direction share improve this question There is a standard heading or bearing equation that you can use if you are at lat1 lon1 and the point you are interested in is at lat2 lon2 then the equation is heading atan2 sin lon2 lon1 cos lat2 cos lat1.. lon1 and the point you are interested in is at lat2 lon2 then the equation is heading atan2 sin lon2 lon1 cos lat2 cos lat1 sin lat2 sin lat1 cos lat2 cos lon2 lon1 This gives you a bearing in radians which you can convert to degrees by multiplying.. you are interested in is at lat2 lon2 then the equation is heading atan2 sin lon2 lon1 cos lat2 cos lat1 sin lat2 sin lat1 cos lat2 cos lon2 lon1 This gives you a bearing in radians which you can convert to degrees by multiplying by 180 . The..
http://stackoverflow.com/questions/5988590/how-to-calculate-the-current-speed-and-average-speed-of-user-travelling-from-cur 0 self startReadingLocation float getDistanceInKm CLLocation newLocation fromLocation CLLocation oldLocation float lat1 lon1 lat2 lon2 lat1 newLocation.coordinate.latitude M_PI 180 lon1 newLocation.coordinate.longitude M_PI 180 lat2 oldLocation.coordinate.latitude.. float getDistanceInKm CLLocation newLocation fromLocation CLLocation oldLocation float lat1 lon1 lat2 lon2 lat1 newLocation.coordinate.latitude M_PI 180 lon1 newLocation.coordinate.longitude M_PI 180 lat2 oldLocation.coordinate.latitude.. M_PI 180 lon2 oldLocation.coordinate.longitude M_PI 180 float R 6371 km float dLat lat2 lat1 float dLon lon2 lon1 float a sin dLat 2 sin dLat 2 cos lat1 cos lat2 sin dLon 2 sin dLon 2 float c 2 atan2 sqrt a sqrt 1..
How can we find the angle between two locations defined by latitude or longitude http://stackoverflow.com/questions/6745131/how-can-we-find-the-angle-between-two-locations-defined-by-latitude-or-longitude c ios ipad ios4 share improve this question The formula to calculate bearing is θ atan2 sin long .cos lat2 cos lat1 .sin lat2 sin lat1 .cos lat2 .cos long Bearing is a direction to move from one location to another location starting from.. share improve this question The formula to calculate bearing is θ atan2 sin long .cos lat2 cos lat1 .sin lat2 sin lat1 .cos lat2 .cos long Bearing is a direction to move from one location to another location starting from north and then clockwise..
Help calculating X and Y from Latitude and Longitude in iPhone http://stackoverflow.com/questions/6852195/help-calculating-x-and-y-from-latitude-and-longitude-in-iphone and is fairly small in area. Pick a coordinate system say bottom left corner with known lat lon at 0 0 pixels. Called lat1 lon2 in following pseudo code Compute vector 1 from the bottom right lat2 lon2 to the bottom left lat1 lon1 Using simple.. pixels. Called lat1 lon2 in following pseudo code Compute vector 1 from the bottom right lat2 lon2 to the bottom left lat1 lon1 Using simple projection xl lon yl lat then vector 1 lon2 lon1 i lat2 lat1 j Compute vector 2 from the lat lon position.. right lat2 lon2 to the bottom left lat1 lon1 Using simple projection xl lon yl lat then vector 1 lon2 lon1 i lat2 lat1 j Compute vector 2 from the lat lon position of person you want latp lonp to put on the map to the bottom left point lat1..
iPhone - Moving a CLLocation by x meters http://stackoverflow.com/questions/7278094/iphone-moving-a-cllocation-by-x-meters and bearing calculates destination coordinates lat2 lon2. all params in degrees void destCoordsInDegrees double lat1 double lon1 double distanceMeters double bearing double lat2 double lon2 If you can't use that take a look at the algorithms..
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