private void UpdateMetersPerPixel()
{
const float refD = 1000.0f; // one kilometer
double earthRadius = WGS84EarthRadius(pos.latitude);
int numTiles = (1 << zoom);
var pxPos = numTiles * Mercator.CoordToPoint(pos);
var refPos = new GlobalPosition(pos.latitude, pos.longitude + Mathf.Rad2Deg * refD / earthRadius);
var pxRef = numTiles * Mercator.CoordToPoint(refPos);
metersPerPixel = refD / Mathf.Abs(pxPos.x - pxRef.x);
}
public Vector2 PixelPosition(GlobalPosition pos)
{
return((1 << GoogleMapsDriver.main.zoom) * Mercator.CoordToPoint(pos));
}