import MapBox from '@/components/MapBox'; import MapView from '@arcgis/core/views/MapView'; import React, { useEffect, useState } from 'react' import * as turf from '@turf/turf' import GeoJSONLayer from "@arcgis/core/layers/GeoJSONLayer"; import FeatureLayer from '@arcgis/core/layers/FeatureLayer'; import * as clusterLabelCreator from "@arcgis/core/smartMapping/labels/clusters"; import tl_lxjk from "./images/tl_lxjk.png"; import tl_zxjk from "./images/tl_zxjk.png"; import ClassBreaksRenderer from "@arcgis/core/renderers/ClassBreaksRenderer"; const clusterConfig = { type: "cluster", clusterRadius: "100px", // {cluster_count} is an aggregate field containing // the number of features comprised by the cluster clusterMinSize: "24px", clusterMaxSize: "60px", labelingInfo: [ { deconflictionStrategy: "none", labelExpressionInfo: { expression: "Text($feature.cluster_count, '#,###')" }, symbol: { type: "text", color: "#004a5d", font: { weight: "bold", family: "Noto Sans", size: "12px" } }, labelPlacement: "center-center" } ] }; const markerSymbol_offline = { type: "picture-marker", // autocasts as new PictureMarkerSymbol() url: tl_lxjk, width: "23px", height: "23px", }; const markerSymbol_online = { type: "picture-marker", // autocasts as new PictureMarkerSymbol() url: tl_zxjk, width: "23px", height: "23px", }; const render: any = { type: "unique-value", // autocasts as new UniqueValueRenderer() field: "type", uniqueValueInfos: [ { value: "red", // code for interstates/freeways symbol: markerSymbol_offline, label: "离线", }, { value: "green", // code for U.S. highways symbol: markerSymbol_online, label: "在线", }, ], } export default function Cluster() { const [view, setView] = useState<MapView>(); useEffect(() => { if (view) { var points = turf.randomPoint(100, { bbox: [121.76073295524006, 30.79371234139185, 119.51814872672357, 31.30549880284,] }) as any; let features: any[] = []; points.features.forEach((item: any, index: number) => { const { geometry } = item; const { coordinates, type } = geometry features.push( { geometry: { type: "point", x: coordinates[0], y: coordinates[1] }, attributes: { ObjectID: index, type: (index & 2) == 0 ? 'red' : 'green' }, }, ) }) console.log(points); let layer = new FeatureLayer({ source: features, objectIdField: "ObjectID", featureReduction: clusterConfig as any, renderer: render, fields: [ { name: "ObjectID", type: "string", }, { name: "type", type: "string", }, ], }); view.map.add(layer) } }, [view]); return ( <> <MapBox setView={setView} /> </> ) }
正文
arcgis api4.x使用图片聚合
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