墨卡託切片地圖獲取圖層的Resulations簡易演算法(在知道地圖原點座標位置)
阿新 • • 發佈:2018-11-16
<TileMatrixSet> <ows:Identifier>EPSG:900913</ows:Identifier> <ows:SupportedCRS>urn:ogc:def:crs:EPSG::900913</ows:SupportedCRS> <TileMatrix> <ows:Identifier>EPSG:900913:0</ows:Identifier> <ScaleDenominator>5.590822639508929E8</ScaleDenominator> <TopLeftCorner>-2.003750834E7 2.0037508E7</TopLeftCorner> <TileWidth>256</TileWidth> <TileHeight>256</TileHeight> <MatrixWidth>1</MatrixWidth> <MatrixHeight>1</MatrixHeight> </TileMatrix> <TileMatrix> <ows:Identifier>EPSG:900913:1</ows:Identifier> <ScaleDenominator>2.7954113197544646E8</ScaleDenominator> <TopLeftCorner>-2.003750834E7 2.0037508E7</TopLeftCorner> <TileWidth>256</TileWidth> <TileHeight>256</TileHeight> <MatrixWidth>2</MatrixWidth> <MatrixHeight>2</MatrixHeight> </TileMatrix> <TileMatrix> <ows:Identifier>EPSG:900913:2</ows:Identifier> <ScaleDenominator>1.3977056598772323E8</ScaleDenominator> <TopLeftCorner>-2.003750834E7 2.0037508E7</TopLeftCorner> <TileWidth>256</TileWidth> <TileHeight>256</TileHeight> <MatrixWidth>4</MatrixWidth> <MatrixHeight>4</MatrixHeight> </TileMatrix> </TileMatrixSet>
如上圖層配置資訊顯示,沒有Resulation引數值,但是有<TopLeftCorner>-2.003750834E7 2.0037508E7</TopLeftCorner>座標,及<TileWidth>256</TileWidth><TileHeight>256</TileHeight>資訊,2.003750834E7*2/256即可獲取第一個Resulation值