https://openlayers.org/en/latest/apidoc/module-ol_proj.html

1.openlayer将经纬度坐标转换为其他坐标(默认为Web Mercator，即“ EPSG：3857”): fromLonLat()

import View from "ol/View";
import { fromLonLat } from "ol/proj.js";

const view = new View({
        center: fromLonLat([120, 30]),
        zoom: 10,
      }),

2.将openlayer投影坐标(默认值为Web Mercator，即“ EPSG：3857”)转化为经纬度坐标: toLonLat()

import View from "ol/View";
import { toLonLat} from "ol/proj.js";

const view = new View({
        center: toLonLat([13394526.254552547, 3542796.544589571]), // 转化后的经纬度为[120.32507658004761, 30.30485450053733]
        zoom: 10,
      }),

3. 地图定位到某一个坐标点

import Map from "ol/Map";

const map = new Map();
const view = map.getView();
view.setZoom(18);
view.setCenter(fromLonLat([120, 30]));

4.获取地图上经纬度在屏幕上的像素点

const coord = [120,30];
const pixel = map.getPixelFromCoordinate(coord)

5.判断屏幕上像素点位置是否有feature

const pixel = [100,100]; // 单位是像素
const bol = map.hasFeatureAtPixel(pixel);

6.判断某一经纬度在地图上是否有feature

// 其实就是4和5的结合
const coord = [120,30];
const pixel = map.getPixelFromCoordinate(coord);
const bol = map.hasFeatureAtPixel(pixel);