I have an image 8640x11520 pixels from a part of the map in real scale. I need convert my x, y point to coordinate, anyone has an idea to find out it?? var mapWidth = 8640; var mapHeight = 11520...

I am trying to calculate the distance between one point and many others on a WGS84 ellipsoid - not the haversine approximation as explained in other answers. I would like to do it in Python but the...

Can you help me to convert lla to xyz coordnates. I am using earthRadius = 6378.137; var x = earthRadius * Math.cos(lat)*Math.cos(lon); var y = earthRadius * Math.cos(lat)*Math.sin(lon); v...

HI I tried to implement a simple GPS tracker. Therefore is used lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0...

For an application I'm writing we are interfacing IOS devices with an external sensor which outputs GPS data over a local wifi network. This data comes across in a "raw" format with respect to alti...

With the introduction of 2.3 > MongoDB has become even more useful with location data handling and querying. MongoDB stores documents as BSON, so each document with have all the document fields,...

Consider points P1 (60°N, 20°E, 0) and P2 (60°N, 22°E, 0) on the surface of the Earth What is the shortest distance between the points P1 and P2, when the shape of the Earth is modeled using WGS-8...

I wrote a delphi program generating a gpx file as input for a "poor man's guidance system" for aerial spray by means of ultralight plane. By and large, it produces route (parallel swaths) using gp...

Searching for some sample code for converting a point in WGS84 coordinate system to a map position in Google Maps (pixel position), also supporting zoom levels. If the codes is well commented, th...

I have a GPS-coordinate in WGS84 that I would like to transform to a map-projection coordinate in SWEREF99 TM using PROJ.4 in Java or Proj4js in JavaScript. Its hard to find documentation for PROJ...