# MapGIS Client for JavaScript API

Cesium MapboxGL Leaflet OpenLayers
API文档

    import {
      getCesiumLayerIndex,
      getTilingSchemeBySpatialReference
    } from './support/utils'

    class ArcGISTileLayerUtil {}

    /**
     * 添加瓦片图层
     * @private
     * @param {Layer} layer 基本图层对象
     * @param {Viewer} innerView Cesium的视图对象
     * @return {Object} 创建好的Cesium图层对象
     * */
    ArcGISTileLayerUtil.addArcGISTileLayer = function (layer, innerView) {
      const tilingScheme = getTilingSchemeBySpatialReference(
        layer.spatialReference,
        layer.extent,
        layer.tileInfo
      )
      const options = {
        // 请求高德地图瓦片的url模板,{x}、{y}、{z}分别表示瓦片的x坐标、y坐标和层级
        url: `${layer.url}/tile/{z}/{y}/{x}`,
        // 地图瓦片的切分方式,经纬度或者Web墨卡托
        tilingScheme,
        // 瓦片宽度
        tileWidth: layer.tileInfo.cols,
        // 瓦片高度
        tileHeight: layer.tileInfo.cols
      }
      const arcgisTileLayer = new Cesium.UrlTemplateImageryProvider(options)
      // 获取图层index
      const index = getCesiumLayerIndex(layer, innerView)
      innerView.imageryLayers.addImageryProvider(arcgisTileLayer, index)
      arcgisTileLayer.id = layer.id
      arcgisTileLayer._realIndex = layer._realIndex + 1
      return arcgisTileLayer
    }

    /**
     * 移除图层
     * @param {Object} layer 图层对象
     * @param {Viewer} innerView Cesium的视图对象
     * */
    ArcGISTileLayerUtil.removeLayer = function (layer, innerView) {
      innerView.imageryLayers.remove(layer)
    }

    export default ArcGISTileLayerUtil

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