if (!tiles.containsKey(point)) {
AltosLatLon ul = transform.lat_lon(point);
AltosLatLon center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));
if (!tiles.containsKey(point)) {
AltosLatLon ul = transform.lat_lon(point);
AltosLatLon center = transform.lat_lon(new AltosPointDouble(x + AltosMap.px_size/2, y + AltosMap.px_size/2));