openlayer 坐标系例子
时间: 2023-08-17 13:06:43 浏览: 106
回答: OpenLayers中常用的坐标系例子有EPSG:4326和EPSG:3857。EPSG:4326对应WGS84坐标系统中的地理坐标(经纬度),而EPSG:3857是一种墨卡托投影坐标,用于地图显示效果较好。通常情况下,数据存储在EPSG:4326中,显示在EPSG:3857中。在OpenLayers中,可以使用坐标转换功能来实现不同坐标系之间的转换。例如,将EPSG:3857转换为EPSG:4326,可以使用transform方法,传入需要转换的坐标、原始坐标系和目标坐标系。具体使用方法如下所示:
```javascript
import {transform} from 'ol/proj';
// EPSG:3857转EPSG:4326
console.log(transform(\[12202419, 4469830\], "EPSG:3857", "EPSG:4326"));
```
这样就可以将EPSG:3857坐标系下的坐标转换为EPSG:4326坐标系下的坐标。
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