cesium加载arcgis离线松散瓦片(EPSG:4326, EPSG:4490)
现有ArcGIS离线瓦片文件，如下图所示：
需要在Cesium中加载显示，切片规则定义(Conf.xml)，可以看出为EPSG:4490，详细参数如下：
<?xml version="1.0" encoding="utf-8" ?> <CacheInfo xsi:type='typens:CacheInfo' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.1'> <TileCacheInfo xsi:type='typens:TileCacheInfo'> <SpatialReference xsi:type='typens:GeographicCoordinateSystem'> <WKT>GEOGCS["GCS_China_Geodetic_Coordinate_System_2000",DATUM["D_China_2000",SPHEROID["CGCS2000",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],AUTHORITY["EPSG",4490]]</WKT> <XOrigin>-399.99999999999989</XOrigin> <YOrigin>-399.99999999999989</YOrigin> <XYScale>11258999068426.24</XYScale> <ZOrigin>-100000</ZOrigin> <ZScale>10000</ZScale> <MOrigin>-100000</MOrigin> <MScale>10000</MScale> <XYTolerance>8.9831528411952117e-009</XYTolerance> <ZTolerance>0.001</ZTolerance> <MTolerance>0.001</MTolerance> <HighPrecision>true</HighPrecision> <LeftLongitude>-180</LeftLongitude> <WKID>4490</WKID> <LatestWKID>4490</LatestWKID> </SpatialReference> <TileOrigin xsi:type='typens:PointN'> <X>-180</X> <Y>90</Y> </TileOrigin> <TileCols>256</TileCols> <TileRows>256</TileRows> <DPI>96</DPI> <PreciseDPI>96</PreciseDPI> <LODInfos xsi:type='typens:ArrayOfLODInfo'> <LODInfo xsi:type='typens:LODInfo'> <LevelID>0</LevelID> <Scale>590995197.14166796</Scale> <Resolution>1.406250026231578</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>1</LevelID> <Scale>295497598.57083398</Scale> <Resolution>0.70312501311578901</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>2</LevelID> <Scale>147748799.28541699</Scale> <Resolution>0.35156250655789451</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>3</LevelID> <Scale>73874399.642708704</Scale> <Resolution>0.17578125327894775</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>4</LevelID> <Scale>36937199.821354397</Scale> <Resolution>0.087890626639473987</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>5</LevelID> <Scale>18468599.910677198</Scale> <Resolution>0.043945313319736994</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>6</LevelID> <Scale>9234299.9553385898</Scale> <Resolution>0.021972656659868472</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>7</LevelID> <Scale>4617149.9776692903</Scale> <Resolution>0.010986328329934226</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>8</LevelID> <Scale>2308574.9888346498</Scale> <Resolution>0.0054931641649671242</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>9</LevelID> <Scale>1154287.49441732</Scale> <Resolution>0.0027465820824835504</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>10</LevelID> <Scale>577143.74720866198</Scale> <Resolution>0.0013732910412417797</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>11</LevelID> <Scale>288571.87360433099</Scale> <Resolution>0.00068664552062088987</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>12</LevelID> <Scale>144285.936802165</Scale> <Resolution>0.0003433227603104438</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>13</LevelID> <Scale>72142.968401082704</Scale> <Resolution>0.00017166138015522239</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>14</LevelID> <Scale>36071.484200541403</Scale> <Resolution>8.5830690077611316e-005</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>15</LevelID> <Scale>18035.742100270701</Scale> <Resolution>4.2915345038805658e-005</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>16</LevelID> <Scale>9017.8710501353398</Scale> <Resolution>2.1457672519402802e-005</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>17</LevelID> <Scale>4508.9355250676699</Scale> <Resolution>1.0728836259701401e-005</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>18</LevelID> <Scale>2254.46776253384</Scale> <Resolution>5.3644181298507123e-006</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>19</LevelID> <Scale>1127.23388126692</Scale> <Resolution>2.6822090649253562e-006</Resolution> </LODInfo> <LODInfo xsi:type='typens:LODInfo'> <LevelID>20</LevelID> <Scale>563.61694063345999</Scale> <Resolution>1.3411045324626781e-006</Resolution> </LODInfo> </LODInfos> </TileCacheInfo> <TileImageInfo xsi:type='typens:TileImageInfo'> <CacheTileFormat>PNG24</CacheTileFormat> <CompressionQuality>0</CompressionQuality> <Antialiasing>false</Antialiasing> </TileImageInfo> <CacheStorageInfo xsi:type='typens:CacheStorageInfo'> <StorageFormat>esriMapCacheStorageModeExploded</StorageFormat> <PacketSize>0</PacketSize> </CacheStorageInfo> </CacheInfo>
使用Cesium.UrlTemplateImageryProvider自定义瓦片规则进行加载，如下：
// 给8位字符串文件名补0 function zeroFill(num, len, radix) { let str = num.toString(radix || 10) while (str.length < len) { str = '0' + str } return str } window.onload = function () { // arcgis离线瓦片 4490 const arcgis_layer = new Cesium.UrlTemplateImageryProvider({ url: 'http://172.16.32.214:7098/_alllayers/{mz}/{my}/{mx}.png', tilingScheme : new Cesium.GeographicTilingScheme(), customTags: { mz: function(imageryProvider, x, y, level) { return 'L' + zeroFill(level + 1, 2, 10) // 注意观测，层级加1了 }, mx: function(imageryProvider, x, y, level) { return 'C' + zeroFill(x, 8, 16) }, my: function(imageryProvider, x, y, level) { return 'R' + zeroFill(y, 8, 16) } } }); const viewer = new Cesium.Viewer("map", { imageryProvider: arcgis_layer }); viewer.scene.backgroundColor = new Cesium.Color(0, 0, 0, 0.0) viewer.scene.globe.baseColor = new Cesium.Color(0, 0, 0, 0.0) // 定位 const extent = [117.36378835873523,38.807473120892745,117.44082323316754,38.84205866142972]; const rect = Cesium.Rectangle.fromDegrees(...extent); viewer.camera.setView({ destination: rect }); }
加载EPSG：4326瓦片，EPSG：4326瓦片详细参数如下：
<?xml version="1.0" encoding="UTF-8"?> <CacheInfo xsi:type="typens:CacheInfo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:typens="http://www.esri.com/schemas/ArcGIS/10.0"> <TileCacheInfo xsi:type="typens:TileCacheInfo"> <SpatialReference xsi:type="typens:GeographicCoordinateSystem"> <WKID>4326</WKID> </SpatialReference> <TileOrigin xsi:type="typens:PointN"> <X>-180</X> <Y>90</Y> </TileOrigin> <TileCols>256</TileCols> <TileRows>256</TileRows> <DPI>96</DPI> <LODInfos xsi:type="typens:ArrayOfLODInfo"> <LODInfo xsi:type="typens:LODInfo"> <LevelID>0</LevelID> <Scale>591657527.594076</Scale> <Resolution>1.406250000000</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>1</LevelID> <Scale>295828763.797038</Scale> <Resolution>0.703125000000</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>2</LevelID> <Scale>147914381.898519</Scale> <Resolution>0.351562500000</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>3</LevelID> <Scale>73957190.949259</Scale> <Resolution>0.175781250000</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>4</LevelID> <Scale>36978595.474630</Scale> <Resolution>0.087890625000</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>5</LevelID> <Scale>18489297.737315</Scale> <Resolution>0.043945312500</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>6</LevelID> <Scale>9244648.868657</Scale> <Resolution>0.021972656250</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>7</LevelID> <Scale>4622324.434329</Scale> <Resolution>0.010986328125</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>8</LevelID> <Scale>2311162.217164</Scale> <Resolution>0.005493164062</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>9</LevelID> <Scale>1155581.108582</Scale> <Resolution>0.002746582031</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>10</LevelID> <Scale>577790.554291</Scale> <Resolution>0.001373291016</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>11</LevelID> <Scale>288895.277146</Scale> <Resolution>0.000686645508</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>12</LevelID> <Scale>144447.638573</Scale> <Resolution>0.000343322754</Resolution> </LODInfo> <LODInfo xsi:type="typens:LODInfo"> <LevelID>13</LevelID> <Scale>72223.819286</Scale> <Resolution>0.000171661377</Resolution> </LODInfo> </LODInfos> </TileCacheInfo> <TileImageInfo xsi:type="typens:TileImageInfo"> <CacheTileFormat>PNG</CacheTileFormat> <CompressionQuality>75</CompressionQuality> <Antialiasing>false</Antialiasing> </TileImageInfo> <CacheStorageInfo xsi:type="typens:CacheStorageInfo"> <StorageFormat>esriMapCacheStorageModeExploded</StorageFormat> <PacketSize>0</PacketSize> </CacheStorageInfo> </CacheInfo>
方法与4490一样。
