android - XYZ to LLA returns latitude in range -180 - 180 instead of -90 - 90 -


i'm working on 3d globe country picking. represented sphere radius equals 1. when user tap screen i'm getting point using ray object picking technique , i'm trying conwert lat, long nex way:

double alt = 1; double lat = math.todegrees(math.atan2(y, x)); double lon = math.todegrees(math.acos(z/alt));

this code returns latitude in range -180 - 180 degrees google geocoder says should in range -90 - 90 degrees.

how can fix ?

use atan2 longitude , asin latitude.

double alt = math.sqrt(x*x+y*y+z*z); double lon = math.todegrees(math.atan2(y, x)); double lat = math.todegrees(math.asin(z/alt));

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