code: public static TileGrid getTileGrid(Point point, int zoom,
  			Projection projection) {
  		ProjectionTransform toWebMercator = projection
  				.getTransformation(ProjectionConstants.EPSG_WEB_MERCATOR);
  		Point webMercatorPoint = toWebMercator.transform(point);
  		BoundingBox boundingBox = new BoundingBox(webMercatorPoint.getX(),
  				webMercatorPoint.getY(), webMercatorPoint.getX(),
  				webMercatorPoint.getY());
  		return getTileGrid(boundingBox, zoom);
  	}
docs: Get the tile grid for the location specified as the projection
  
  @param point
  point
  @param zoom
  zoom level
  @param projection
  projection
  @return tile grid
  @since 1.1.0