瓦片网格

TIP

加载瓦片网格(主要用于调试地图)。

代码如下:

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<template>
  <div id="map"></div>
</template>

<script lang="ts" setup>
import { Map, View } from "ol";
import { Tile as TileLayer } from "ol/layer";
import { onMounted, onBeforeUnmount } from "vue";
import { XYZ, TileDebug } from "ol/source";
import { ATTRIBUTIONS, MAPURL } from "../../../constants";

//实例化图层数据源对象
const TiandituSource = new XYZ({
  attributions: ATTRIBUTIONS,
  wrapX: false,
  url: MAPURL,
});
let map: Map | null = null;
onMounted(() => {
  map = new Map({
    //地图容器div的ID
    target: "map",
    //地图容器中加载的图层
    layers: [
      //加载瓦片图层数据
      new TileLayer({
        source: TiandituSource,
      }),
      //加载瓦片网格图层
      new TileLayer({
        source: new TileDebug({
          //地图投影坐标系
          projection: "EPSG:3857",
          //获取瓦片图层数据对象（osmSource）的网格信息
          tileGrid: TiandituSource.getTileGrid() || undefined,
        }),
      }),
    ],
    //地图视图设置
    view: new View({
      //地图初始中心点
      center: [12900000, 4900000],
      //地图初始显示级别
      zoom: 8,
    }),
  });
});

onBeforeUnmount(() => {
  if (map) {
    map.dispose();
    map = null;
  }
});
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
#map {
  height: 650px;
}
</style>