presto-geospatial/src/main/java/io/prestosql/plugin/geospatial/BingTileFunctions.java/BingTileFunctions/tileToEnvelope
class BingTileFunctions:    private static Envelope tileToEnvelope(BingTile tile)
    {
        Point upperLeftCorner = tileXYToLatitudeLongitude(tile.getX(), tile.getY(), tile.getZoomLevel());
        Point lowerRightCorner = tileXYToLatitudeLongitude(tile.getX() + 1, tile.getY() + 1, tile.getZoomLevel());
        return new Envelope(upperLeftCorner.getX(), lowerRightCorner.getY(), lowerRightCorner.getX(), upperLeftCorner.getY());
    }