diff options
| -rw-r--r-- | services/core/java/com/android/server/location/fudger/LocationFudger.java | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/services/core/java/com/android/server/location/fudger/LocationFudger.java b/services/core/java/com/android/server/location/fudger/LocationFudger.java index 88a269706470..27ad555f3701 100644 --- a/services/core/java/com/android/server/location/fudger/LocationFudger.java +++ b/services/core/java/com/android/server/location/fudger/LocationFudger.java @@ -239,6 +239,15 @@ public class LocationFudger { // requires latitude since longitudinal distances change with distance from equator. private static double metersToDegreesLongitude(double distance, double lat) { - return distance / APPROXIMATE_METERS_PER_DEGREE_AT_EQUATOR / Math.cos(Math.toRadians(lat)); + // Needed to convert from longitude distance to longitude degree. + // X meters near the poles is more degrees than at the equator. + double cosLat = Math.cos(Math.toRadians(lat)); + // If we are right on top of the pole, the degree is always 0. + // We return a very small value instead to avoid divide by zero errors + // later on. + if (cosLat == 0.0) { + return 0.0001; + } + return distance / APPROXIMATE_METERS_PER_DEGREE_AT_EQUATOR / cosLat; } } |