CODEWITHSUNDEEP
androidgoogle-mapsgoogle-maps-android-api-2
Shahrear Bin Amin
Shahrear Bin Amin

Reputation: 1135

How to find LatLng bound for an area in google maps?

In google maps I want to fix my camera to a particular country. I don't need whole worlds Mercator projection. So I need to set LatLngBounds in my google maps. How can I find LatLngBounds of a particular region? Here is my code but it's not setting LatLngBounds as my expectation set's constraints on right side.

         LatLng v1= new LatLng(24.044982389517603,89.75482430309057);
         LatLng v2 = new LatLng(22.309956868003045,91.20187237858772);
        LatLngBounds BANGLADESH = new LatLngBounds(
                v2,v1
        );
        mMap.setLatLngBoundsForCameraTarget(BANGLADESH);

enter image description here

Upvotes: 0

Views: 1132

Answers (1)

Andrii Omelchenko
Andrii Omelchenko

Reputation: 13353

You can get country boundaries once from openstreetmap.org like described in this article of Pēteris Ņikiforovs or by http://polygons.openstreetmap.fr/get_poly.py?id=184640&params=0 and add it as polygon points find LatLngBounds like you do it:

...
Builder builder = new LatLngBounds.Builder(); 
for(int i = 0 ; i < N_POINTS; i++) {          
    builder.include(new LatLng(lat, lng));
}
LatLngBounds BANGLADESH = new LatLngBounds = builder.build();

int padding = 15; // offset from edges of the map in pixels
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngBounds(BANGLADESH, padding);

mMap.moveCamera(cameraUpdate );
...

Upvotes: 0

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