TimeInfo 提供諸如存儲每個要素的start 和end 時間以及圖層的fullTimeExtent 的日期字段等信息。
timeInfo
屬性及其startField
和endField
屬性必須在層初始化時設置,如果它是為從 client-side features 初始化的 CSVLayer 、 GeoJSONLayer 或 FeatureLayer 設置的.timeInfo
的 fullTimeExtent 是根據其startField
和endField
屬性自動計算的。圖層為 loaded 後,timeInfo 參數無法更改。默認值:null
例子:
// create geojson layer from usgs earthquakes geojson feed const geojsonLayer = new GeoJSONLayer({ url: "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson", copyright: "USGS Earthquakes", fields: [ { "name": "mag", "type": "double" }, { "name": "place", "type": "string" }, { "name": "time", "type": "date" }, // date field { "name": "depth", "type": "double" } ], // timeInfo can be used to do temporal queries // set the startField and endField. // timeExtent is automatically calculated from the // the start and end date fields // The date values must be in milliseconds number from the UNIX epoch specified in UTC. timeInfo: { startField: "time" } });
基本信息
以下是所在類或對象的基本信息。
AMD:
require(["esri/layers/SubtypeGroupLayer"], (SubtypeGroupLayer) => { /* code goes here */ });
ESM:
import SubtypeGroupLayer from "@arcgis/core/layers/SubtypeGroupLayer";
類:
esri/layers/SubtypeGroupLayer
繼承: SubtypeGroupLayer > Layer > Accessor
自從:用於 JavaScript 4.20 的 ArcGIS API
用法說明
SubtypeGroupLayer.timeInfo
函數(或屬性)的定義如下:
相關用法
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注:本文由純淨天空篩選整理自arcgis.com大神的英文原創作品 SubtypeGroupLayer.timeInfo。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。