Openlayers中不同投影间的转换

    var lonlat = map.getLonLatFromViewPortPx(e.xy);
    evt_lon = lonlat.lon; evt_lat = lonlat.lat;
    var lonlatt1 = new OpenLayers.LonLat(evt_lon, evt_lat);    
    lonlatt1.transform('EPSG:3857', 'EPSG:4326');
    evt_lon = lonlatt1.lon;
    evt_lat = lonlatt1.lat;
    params.version = "1.1.1";
    params.x = parseInt(evt_lon);
    params.y = parseInt(evt_lat);
	console.log(params.x);

转载自：https://blog.csdn.net/wt346326775/article/details/50587388