/// <param name="latLong">
/// the point </param>
/// <param name="tile">
/// the tile </param>
/// <returns> true if the point is located in the given tile </returns>
public static bool pointInTile(LatLong latLong, TileCoordinate tile)
{
if (latLong == null || tile == null)
{
return(false);
}
double lon1 = MercatorProjection.tileXToLongitude(tile.X, tile.Zoomlevel);
double lon2 = MercatorProjection.tileXToLongitude(tile.X + 1, tile.Zoomlevel);
double lat1 = MercatorProjection.tileYToLatitude(tile.Y, tile.Zoomlevel);
double lat2 = MercatorProjection.tileYToLatitude(tile.Y + 1, tile.Zoomlevel);
return(latLong.latitude <= lat1 && latLong.latitude >= lat2 && latLong.longitude >= lon1 && latLong.longitude <= lon2);
}
private static double[] bufferInDegrees(long tileY, sbyte zoom, int enlargementInMeter)
{
if (enlargementInMeter == 0)
{
return(EPSILON_ZERO);
}
double[] epsilons = new double[2];
double lat = MercatorProjection.tileYToLatitude(tileY, zoom);
epsilons[0] = LatLongUtils.latitudeDistance(enlargementInMeter);
epsilons[1] = LatLongUtils.longitudeDistance(enlargementInMeter, lat);
return(epsilons);
}
private static Geometry tileToJTSGeometry(long tileX, long tileY, sbyte zoom, int enlargementInMeter)
{
double minLat = MercatorProjection.tileYToLatitude(tileY + 1, zoom);
double maxLat = MercatorProjection.tileYToLatitude(tileY, zoom);
double minLon = MercatorProjection.tileXToLongitude(tileX, zoom);
double maxLon = MercatorProjection.tileXToLongitude(tileX + 1, zoom);
double[] epsilons = bufferInDegrees(tileY, zoom, enlargementInMeter);
minLon -= epsilons[1];
minLat -= epsilons[0];
maxLon += epsilons[1];
maxLat += epsilons[0];
Coordinate bottomLeft = new Coordinate(minLon, minLat);
Coordinate topRight = new Coordinate(maxLon, maxLat);
return(GEOMETRY_FACTORY.createLineString(new Coordinate[] { bottomLeft, topRight }).Envelope);
}
