private static TileMatrix getTileMatrixAtLengthIndex(
			List<TileMatrix> tileMatrices, int index) {
		return tileMatrices.get(tileMatrices.size() - index - 1);
	}
private static TileMatrix getTileMatrixAtLengthIndex ( List < TileMatrix > tileMatrices , int index ) { return tileMatrices . get ( tileMatrices . size ( ) - index - 1 ) ; }
Get the tile matrix represented by the current length index

@param tileMatrices
tile matrices
@param index
index location in sorted lengths
@return tile matrix