openlayer3 坐标系转换

'EPSG:4326'-经纬度坐标-WGS84
'EPSG:3857'- xy坐标-web墨卡托

ol3默认的坐标系为3857,即在创建ol.map的时候,若不指定projection,则默认为EPSG:3857

转换方法如下:

var m_center=[116.35,39.9];//地图中心点-经纬度坐标 //经纬度转至xy m_center = ol.proj.transform(m_center,'EPSG:4326', 'EPSG:3857' ); //反过来 var m_center=[12914838.35,4814529.9];//地图中心点-xy坐标 //经纬度转至经纬度 m_center = ol.proj.transform(m_center, 'EPSG:3857' ,'EPSG:4326');

 

转自:https://www.cnblogs.com/dullfish/p/6617840.html

 

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