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How to convert latitude and longitude to Cartesian coordinates?
The proj.4 software provides a command line program that can do the conversion, e.g. It also provides a C API. In particular, the function pj_geodetic_to_geocentric will do the conversion without having to set up a projection object first.
How to convert latitude and longitude to radians?
The conversion is: x = R * cos (lat) * cos (lon) y = R * cos (lat) * sin (lon) z = R *sin (lat) Where R is the approximate radius of earth (e.g. 6371 km). If your trigonometric functions expect radians (which they probably do), you will need to convert your longitude and latitude to radians first.
Is the reciprocal of flattening the same in Cartesian coordinates?
Longitude in GPS（WGS84） and Cartesian coordinates are the same. Reciprocal of flattening is 298.257223563. Please notice that the h is altitude above the WGS 84 ellipsoid.
Where does the x axis go in a Cartesian coordinate system?
Here’s the answer I found: Just to make the definition complete, in the Cartesian coordinate system: the x-axis goes through long,lat (0,0), so longitude 0 meets the equator;
As @radouxju says, you have two components of a 3d cartesian conversion. It sounds like you are really looking for a Map Projection. This converts the surface of the Earth (latitude, longitude) into flat 2d cartesian coordinates. It is impossible to do this without some distortion. Hence there are literally thousands of possible projections.
How to convert lat, lon, Alt to ECEF coordinates?
Covert lat, lon, alt to ECEF Cartesian. LLA2ECEF – convert latitude, longitude, and altitude to earth-centered, earth-fixed (ECEF) cartesian coordinates. USAGE: [x,y,z] = lla2ecef (lat,lon,alt) x = ECEF X-coordinate (m) y = ECEF Y-coordinate (m)
How to correctly translate lat / lon coordinates to XY coordinates?
I’m lost on how to correctly and accurately translate Lat/Lon coordinates to XY coordinates to draw them using OpenGL. The coordinate information I have is the following: Start Lon, Start Lat, End Lon, End Lat.