arcgis 4 与deckgl 整合 （二）

针对deckgl TripsLayer

我们构建采集器，目的是支持多种数据类型到 TripsLayer, 并且支持arcgis 服务

• const axios = require('axios')
•  
• export default class TripsLayerParser {
• static getDataFromUrl(url: string) {
• return new Promise((resolve => {
• const queryUrl = `${url}/query?where=1%3D1&text=&objectIds=&time=&geometry=&geometryType=esriGeometryEnvelope&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&outFields=%5B%5D&returnGeometry=true&returnTrueCurves=false&maxAllowableOffset=&geometryPrecision=&outSR=&returnIdsOnly=false&returnCountOnly=false&orderByFields=&groupByFieldsForStatistics=&outStatistics=&returnZ=false&returnM=false&gdbVersion=&returnDistinctValues=false&resultOffset=&resultRecordCount=&queryByDistance=&returnExtentsOnly=false&datumTransformation=&parameterValues=&rangeValues=&f=geojson`;
• axios.get(queryUrl).then((r: any) => {
• let data = this.getTimestampFromGeoJson(r.data);
• resolve(data);
• });
• }));
• }
•  
• static getDataFromJsonUrl(url: string) {
• return new Promise((resolve => {
• axios.get(url).then((r: any) => {
• let data = this.getTimestampFromGeoJson(r.data);
• resolve(data);
• });
• }));
• }
•  
• static getDataFromArray(array: any) {
• return this.getTimestampFromArray(array);
• }
•  
• private static getTimestampFromArray(lines: any) {
• let data: any = [];
• lines.forEach((line: any) => {
• data.push({
• path: line.geometry,
• timestamps: this.getRandomTimestamp(line.geometry.length)
• });
• });
• return data;
• }
•  
• private static getTimestampFromGeoJson(dataArray: any) {
• let lines = dataArray.features;
•  
• let data: any = [];
• lines.forEach((line: any) => {
• if (line.geometry.type === "MultiLineString") {
• for (let item of line.geometry.coordinates) {
• data.push({
• path: item,
• timestamps: this.getRandomTimestamp(item.length)
• });
• }
• } else {
• data.push({
• path: line.geometry.coordinates,
• timestamps: this.getRandomTimestamp(line.geometry.coordinates.length)
• });
• }
• });
• return data;
• }
•  
• private static getRandomTimestamp(length: number) {
• let timestamps: any = [];
• for (let i = 0; i < length; i++) {
• timestamps.push(i * 100);
• }
• return timestamps;
• }
• }

封装的
```javascript
import BaseLayer from "./BaseLayer";
import TripsLayerParser from "./TripsLayerParser";
import ColorManager from "./ColorManager";
const {TripsLayer} = require("@deck.gl/geo-layers");

export default class DeckTripsLayer extends BaseLayer {

view: any;
options: any;

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