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androidgoogle-mapsgoogle-apigeopoints

GoogleMaps GeoPoint value range

I tried to add some GeoPoints on my map but I've problems with some “special” points.

The range of the latitude value is +90 to -90 and therefore I want to add a point like the this...

int latitude: 85000000;
int longitude = 45000000;
GeoPoint point = new GeoPoint(latitude, longitude);

...and after this I double check the latitude value with:

point.getLongitudeE6();

I always get a maximum value of 80000000 back. Can someone explain why google set this limit for a GeoPoint and what the reason for this limitation is?

Thanks!

Solution

  • Your issue is with getLatitudeE6(). GeoPoint doesn't work near the poles. You're probably going too far north or too far south.

    This behavior is by design. From the docs:

    [The latitude] will be clamped to between -80 degrees and +80 degrees inclusive, in order to maintain accuracy in the Mercator projection.

    Likewise, longitude is limited to -180 to +180.