arcgis API for javascript 4.x GeoJSONLayer 加载方法

本文主要是介绍arcgis API for javascript 4.x GeoJSONLayer 加载方法，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1.引入GeoJSONLayer
import GeoJSONLayer from '@arcgis/core/layers/GeoJSONLayer'
或者
require(["esri/layers/GeoJSONLayer"], function(GeoJSONLayer){ 
const geojsonlayer = new GeoJSONLayer({ 
url: "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson", copyright: "USGS Earthquakes" }); 
map.add(geojsonlayer); // adds the layer to the map 
});

// create a geojson layer from geojson feature collection 
const geojson = { 
type: "FeatureCollection", 
features: [ 
{ 
type: "Feature", 
id: 1, 
eometry: { 
type: "Polygon", 
coordinates: [ 
[ 
[100.0, 0.0], 
[101.0, 0.0], 
[101.0, 1.0], 
[100.0, 1.0], 
[100.0, 0.0] 
] 
] 
}, 
properties: { 
type: "single", 
recordedDate: "2018-02-07T22:45:00-08:00" } 
} 
] 
}; 
// create a new blob from geojson featurecollection 
const blob = new Blob([JSON.stringify(geojson)], { 
type: "application/json" 
}); 
// URL reference to the blob 
const url = URL.createObjectURL(blob); 
// create new geojson layer using the blob url 
const layer = new GeoJSONLayer({ 
url 
});this.map.add(layer) // 加载至当前地图

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