openlayers:实现数据瓦片 main.js index.html package.json 此示例从头开始生成RGBA切片数据。 main.js import DataTile from 'ol/source/DataTile.js'; import Map from 'ol/Map.js'; import TileLayer from 'ol/layer/WebGLTile.js'; import View from 'ol/View.js'; const size = 256; const canvas = document<