ArcGIS-JS-API加载天地图

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背景

在天地图官网服务可以看到，天地图提供了多种底图服务，分别有两种投影类型，CGCS2000和Web Mercator。

1584498518305

WMTSLayer加载失败

使用WMTSLayer进行加载

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const wmtsLayer = new WMTSLayer({
  id: "wmts",
  url: "http://t0.tianditu.gov.cn/vec_c/wmts",
  customParameters: {
    tk: "b854fdb3a3b2625bd6c8353e83f7cca3"
  },
  serviceMode: "KVP",
});

结果：无报错，不上图。

查看源码得知：

WMTSLayer先请求元数据，然后构造tileInfo，最后用WebTileLayer加载。

问题排查

查看天地图和Esri的切片方案。

Esri的切片方案是从第0级开始，天地图的切片方案从第1级开始。

切片方案，附在文末附件中。

WebTileLayer加载

4490和4326差别很小，可以叠加，所以CGCS2000的服务，采用4326来加载。

tileInfo中dpi，参考一篇博文，设置为layers/support/wmtsUtils.js中的90.71428571428571。

lods采用4326的切片方案，levelValue设置为天地图的level。

size和origin按天地图的切片方案设置。

spatialReference设置为4326。（如果设置为4490，也可以上图，但是view的center不生效。）

通过构造TileInfo，使用WebTileLayer来加载。

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import WebTileLayer from "esri/layers/WebTileLayer";
import TileInfo from "esri/layers/support/TileInfo";
import SpatialReference from "esri/geometry/SpatialReference";

const tileInfoWebMercator = new TileInfo({
  dpi: 90.71428571427429,
  lods: [{
    level: 0,
    scale: 591657527.591555,
    resolution: 156543.033928
  },
  {
    level: 1,
    scale: 295828763.795777,
    resolution: 78271.5169639999
  },
  {
    level: 2,
    scale: 147914381.897889,
    resolution: 39135.7584820001
  },
  {
    level: 3,
    scale: 73957190.948944,
    resolution: 19567.8792409999
  },
  {
    level: 4,
    scale: 36978595.474472,
    resolution: 9783.93962049996
  },
  {
    level: 5,
    scale: 18489297.737236,
    resolution: 4891.96981024998
  },
  {
    level: 6,
    scale: 9244648.868618,
    resolution: 2445.98490512499
  },
  {
    level: 7,
    scale: 4622324.434309,
    resolution: 1222.99245256249
  },
  {
    level: 8,
    scale: 2311162.217155,
    resolution: 611.49622628138
  },
  {
    level: 9,
    scale: 1155581.108577,
    resolution: 305.748113140558
  },
  {
    level: 10,
    scale: 577790.554289,
    resolution: 152.874056570411
  },
  {
    level: 11,
    scale: 288895.277144,
    resolution: 76.4370282850732
  },
  {
    level: 12,
    scale: 144447.638572,
    resolution: 38.2185141425366
  },
  {
    level: 13,
    scale: 72223.819286,
    resolution: 19.1092570712683
  },
  {
    level: 14,
    scale: 36111.909643,
    resolution: 9.55462853563415
  },
  {
    level: 15,
    scale: 18055.954822,
    resolution: 4.77731426794937
  },
  {
    level: 16,
    scale: 9027.977411,
    resolution: 2.38865713397468
  },
  {
    level: 17,
    scale: 4513.988705,
    resolution: 1.19432856685505
  },
  {
    level: 18,
    scale: 2256.994353,
    resolution: 0.597164283559817
  },
  {
    level: 19,
    scale: 1128.497176,
    resolution: 0.298582141647617
  }],
  size: [256, 256],
  origin: {
    x: -20037508.342787,
    y: 20037508.342787
  },
  spatialReference: SpatialReference.WebMercator
});
const tileInfoWGS84 = new TileInfo({
  dpi: 90.71428571427429,
  lods: [
    {
      level: 0,
      levelValue: "1",
      scale: 295828763.79585470937713011037,
      resolution: 0.703125
    },
    {
      level: 1,
      levelValue: "2",
      scale: 147914381.89792735468856505518,
      resolution: 0.3515625
    },
    {
      level: 2,
      levelValue: "3",
      scale: 73957190.948963677344282527592,
      resolution: 0.17578125
    },
    {
      level: 3,
      levelValue: "4",
      scale: 36978595.474481838672141263796,
      resolution: 0.087890625
    },
    {
      level: 4,
      levelValue: "5",
      scale: 18489297.737240919336070631898,
      resolution: 0.0439453125
    },
    {
      level: 5,
      levelValue: "6",
      scale: 9244648.868620459668035315949,
      resolution: 0.02197265625
    },
    {
      level: 6,
      levelValue: "7",
      scale: 4622324.4343102298340176579745,
      resolution: 0.010986328125
    },
    {
      level: 7,
      levelValue: "8",
      scale: 2311162.2171551149170088289872,
      resolution: 0.0054931640625
    },
    {
      level: 8,
      levelValue: "9",
      scale: 1155581.1085775574585044144937,
      resolution: 0.00274658203125
    },
    {
      level: 9,
      levelValue: "10",
      scale: 577790.55428877872925220724681,
      resolution: 0.001373291015625
    },
    {
      level: 10,
      levelValue: "11",
      scale: 288895.2771443893646261036234,
      resolution: 0.0006866455078125
    },
    {
      level: 11,
      levelValue: "12",
      scale: 144447.63857219468231305181171,
      resolution: 0.00034332275390625
    },
    {
      level: 12,
      levelValue: "13",
      scale: 72223.819286097341156525905853,
      resolution: 0.000171661376953125
    },
    {
      level: 13,
      levelValue: "14",
      scale: 36111.909643048670578262952926,
      resolution: 0.0000858306884765625
    },
    {
      level: 14,
      levelValue: "15",
      scale: 18055.954821524335289131476463,
      resolution: 0.00004291534423828125
    },
    {
      level: 15,
      levelValue: "16",
      scale: 9027.977410762167644565738231,
      resolution: 0.000021457672119140625
    },
    {
      level: 16,
      levelValue: "17",
      scale: 4513.9887053810838222828691158,
      resolution: 0.0000107288360595703125
    },
    {
      level: 17,
      levelValue: "18",
      scale: 2256.9943526905419111414345579,
      resolution: 0.00000536441802978515625
    },
    {
      level: 18,
      levelValue: "19",
      scale: 1128.4971763452709555707172788,
      resolution: 0.000002682209014892578125
    }
  ],
  size: [256, 256],
  origin: {
    x: -180,
    y: 90
  },
  spatialReference: SpatialReference.WGS84
});
export default class TianDiTuLayer extends WebTileLayer {
  constructor(props: WebTileLayer) {
    super(props);
    this.tileInfo = this.generateTileInfo(props.urlTemplate);
    this.urlTemplate = this.generateUrlTemplate(props.urlTemplate);
    this.subDomains = ["t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7"];
  }
  
  private generateUrlTemplate(urlTemplate: string): string {
    const [layer, tileMatrixSet] = urlTemplate.split('/')[3].split('_');
    return `http://{subDomain}.tianditu.com/${layer}_${tileMatrixSet}/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetTile&LAYER=${layer}&STYLE=default&FORMAT=tiles&TILEMATRIXSET=${tileMatrixSet}&TILEMATRIX={level}&TILEROW={row}&TILECOL={col}&tk=ac0daf56728bbb77d9514ba3df69bcd3`;
  }

  private generateTileInfo(urlTemplate: string): TileInfo {
    const [layer, tileMatrixSet] = urlTemplate.split('/')[3].split('_');
    return tileMatrixSet === 'c' ? tileInfoWGS84 : tileInfoWebMercator;
  }
}
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new TianDiTuLayer({
  urlTemplate: "http://t0.tianditu.com/vec_w/wmts"
} as TianDiTuLayer);
new TianDiTuLayer({
  urlTemplate: "http://t0.tianditu.com/img_c/wmts",
  spatialReference: SpatialReference.WGS84
} as TianDiTuLayer);

附件

天地图-经纬度投影-切片方案

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<?xml version="1.0" encoding="UTF-8"?>
<Capabilities
    xsi:schemaLocation="http://www.opengis.net/wmts/1.0 http://schemas.opengis.net/wmts/1.0.0/wmtsGetCapabilities_response.xsd"
    version="1.0.0" xmlns="http://www.opengis.net/wmts/1.0"
    xmlns:ows="http://www.opengis.net/ows/1.1"
    xmlns:gml="http://www.opengis.net/gml"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink">
    <ows:ServiceIdentification>
        <ows:Title>在线地图服务</ows:Title>
        <ows:Abstract>基于OGC标准的地图服务</ows:Abstract>
        <ows:Keywords>
            <ows:Keyword>OGC</ows:Keyword>
        </ows:Keywords>
        <ows:ServiceType codeSpace="wmts"/>
        <ows:ServiceTypeVersion>1.0.0</ows:ServiceTypeVersion>
        <ows:Fees>none</ows:Fees>
        <ows:AccessConstraints>none</ows:AccessConstraints>
    </ows:ServiceIdentification>
    <ows:ServiceProvider>
        <ows:ProviderName>国家基础地理信息中心</ows:ProviderName>
        <ows:ProviderSite>http://www.tianditu.com</ows:ProviderSite>
        <ows:ServiceContact>
            <ows:IndividualName>Mr Liu</ows:IndividualName>
            <ows:PositionName>Software Engineer</ows:PositionName>
            <ows:ContactInfo>
                <ows:Phone>
                    <ows:Voice>010-88187700</ows:Voice>
                    <ows:Facsimile>010-88187700</ows:Facsimile>
                </ows:Phone>
                <ows:Address>
                    <ows:DeliveryPoint>北京市海淀区莲花池西路28号</ows:DeliveryPoint>
                    <ows:City>北京市</ows:City>
                    <ows:AdministrativeArea>北京市</ows:AdministrativeArea>
                    <ows:Country>中国</ows:Country>
                    <ows:PostalCode>101399</ows:PostalCode>
                    <ows:ElectronicMailAddress>tianditu.com</ows:ElectronicMailAddress>
                </ows:Address>
                <ows:OnlineResource xlink:type="simple" xlink:href="http://www.tianditu.com"/>
            </ows:ContactInfo>
        </ows:ServiceContact>
    </ows:ServiceProvider>
    <ows:OperationsMetadata>
        <ows:Operation name="GetCapabilities">
            <ows:DCP>
                <ows:HTTP>
                    <ows:Get xlink:href="http://t0.tianditu.com/vec_c/wmts?">
                        <ows:Constraint name="GetEncoding">
                            <ows:AllowedValues>
                                <ows:Value>KVP</ows:Value>
                            </ows:AllowedValues>
                        </ows:Constraint>
                    </ows:Get>
                </ows:HTTP>
            </ows:DCP>
        </ows:Operation>
        <ows:Operation name="GetTile">
            <ows:DCP>
                <ows:HTTP>
                    <ows:Get xlink:href="http://t0.tianditu.com/vec_c/wmts?">
                        <ows:Constraint name="GetEncoding">
                            <ows:AllowedValues>
                                <ows:Value>KVP</ows:Value>
                            </ows:AllowedValues>
                        </ows:Constraint>
                    </ows:Get>
                </ows:HTTP>
            </ows:DCP>
        </ows:Operation>
    </ows:OperationsMetadata>
    <Contents>
        <Layer>
            <ows:Title>vec</ows:Title>
            <ows:Abstract>vec</ows:Abstract>
            <ows:Identifier>vec</ows:Identifier>
            <ows:WGS84BoundingBox>
                <ows:LowerCorner>-180.0 -90.0</ows:LowerCorner>
                <ows:UpperCorner>180.0 90.0</ows:UpperCorner>
            </ows:WGS84BoundingBox>
            <ows:BoundingBox>
                <ows:LowerCorner>-180.0 -90.0</ows:LowerCorner>
                <ows:UpperCorner>180.0 90.0</ows:UpperCorner>
            </ows:BoundingBox>
            <Style>
                <ows:Identifier>default</ows:Identifier>
            </Style>
            <Format>tiles</Format>
            <TileMatrixSetLink>
                <TileMatrixSet>c</TileMatrixSet>
            </TileMatrixSetLink>
        </Layer>
        <TileMatrixSet>
            <ows:Identifier>c</ows:Identifier>
            <ows:SupportedCRS>urn:ogc:def:crs:EPSG::4490</ows:SupportedCRS>
            <TileMatrix>
                <ows:Identifier>1</ows:Identifier>
                <ScaleDenominator>2.958293554545656E8</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>2</MatrixWidth>
                <MatrixHeight>1</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>2</ows:Identifier>
                <ScaleDenominator>1.479146777272828E8</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>4</MatrixWidth>
                <MatrixHeight>2</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>3</ows:Identifier>
                <ScaleDenominator>7.39573388636414E7</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>8</MatrixWidth>
                <MatrixHeight>4</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>4</ows:Identifier>
                <ScaleDenominator>3.69786694318207E7</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>16</MatrixWidth>
                <MatrixHeight>8</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>5</ows:Identifier>
                <ScaleDenominator>1.848933471591035E7</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>32</MatrixWidth>
                <MatrixHeight>16</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>6</ows:Identifier>
                <ScaleDenominator>9244667.357955175</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>64</MatrixWidth>
                <MatrixHeight>32</MatrixHeight>
            </TileMatrix>                
			    <TileMatrix>
                <ows:Identifier>7</ows:Identifier>
                <ScaleDenominator>4622333.678977588</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>128</MatrixWidth>
                <MatrixHeight>64</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>8</ows:Identifier>
                <ScaleDenominator>2311166.839488794</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>256</MatrixWidth>
                <MatrixHeight>128</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>9</ows:Identifier>
                <ScaleDenominator>1155583.419744397</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>512</MatrixWidth>
                <MatrixHeight>256</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>10</ows:Identifier>
                <ScaleDenominator>577791.7098721985</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>1024</MatrixWidth>
                <MatrixHeight>512</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>11</ows:Identifier>
                <ScaleDenominator>288895.85493609926</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>2048</MatrixWidth>
                <MatrixHeight>1024</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>12</ows:Identifier>
                <ScaleDenominator>144447.92746804963</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>4096</MatrixWidth>
                <MatrixHeight>2048</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>13</ows:Identifier>
                <ScaleDenominator>72223.96373402482</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>8192</MatrixWidth>
                <MatrixHeight>4096</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>14</ows:Identifier>
                <ScaleDenominator>36111.98186701241</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>16384</MatrixWidth>
                <MatrixHeight>8192</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>15</ows:Identifier>
                <ScaleDenominator>18055.990933506204</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>32768</MatrixWidth>
                <MatrixHeight>16384</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>16</ows:Identifier>
                <ScaleDenominator>9027.995466753102</ScaleDenominator>
                <TopLeftCorner>90.0 -180.0</TopLeftCorner>
                <TileWidth>256</TileWidth>
                <TileHeight>256</TileHeight>
                <MatrixWidth>65536</MatrixWidth>
                <MatrixHeight>32768</MatrixHeight>
            </TileMatrix>
            <TileMatrix>
                <ows:Identifier>17</ows:Identifier>
                <ScaleDenominator>4513.997733376551</ScaleDenominator>
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天地图-球面墨卡托投影-切片方案

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<?xml version="1.0" encoding="UTF-8"?>
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Esri-WGS84_Geographic_Coordinate_System_V2

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Esri-ArcGIS_Online_Bing_Maps_Google_Maps

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