How to get lat/long of RMTile?

[BUDDAx2]

Hi!

How can I get lat/long of some RMTile?

Maybe somebody can give me an advise how to add some tiles layer to my map? As I know I can't use more than one TileSource at the same time. So I tried to add my custom tiles as a RMMarkers. I have XYZ position of tile, but how convert it to lat/long coordinates?

[Vladimir Vyskocil]

Hi,

I use the following code :

#define kDefaultTileSize 256

static double initialResolution = 2 * M_PI * 6378137 / kDefaultTileSize;

static double originShift = M_PI * 6378137;

-(RMLatLong)centerLatLonForTileX:(unsigned int) tx tileY:(unsigned int) ty zoom:(unsigned int) zoom {

    RMLatLong center;

    double px = (tx+0.5)*kDefaultTileSize;

    double py = (ty+0.5)*kDefaultTileSize;

    

    double res = initialResolution / exp2(zoom);

    double x = px * res - originShift;

    double y = py * res - originShift;

    

    center.longitude = (x / originShift) * 180.0;

    center.latitude = 180 / M_PI * (2 * atan( exp( (y / originShift) * M_PI)) - M_PI_2);

    

    return center;

}

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[BUDDAx2]

Thank you!