Openlayers OSM始终设置为(长/纬)(0/0)

时间:2011-12-01 08:04:47

标签: javascript openlayers openstreetmap

这是我的代码

map = new OpenLayers.Map("map");    
// I tried several projections here, all lead to the same result
var proj = new OpenLayers.Projection("WGS84");
var point = new OpenLayers.LonLat(position.coords.latitude,position.coords.longitude);
point.transform(proj, map.getProjectionObject());

// the output of this shows the correct coordinates
console.log("latitude: "+position.coords.latitude+"  long "+position.coords.longitude);

var mapnik = new OpenLayers.Layer.OSM();
map.addLayer(mapnik);
map.setCenter(point,3);

它始终显示以坐标(0/0)为中心的地图,它位于大西洋的某个地方。我的错误在哪里?我无法解决这个问题,在谷歌上找不到任何东西。 请帮忙。

然而,这有效。

map = new OpenLayers.Map( 'map');
layer = new OpenLayers.Layer.OSM( "Simple OSM Map");
map.addLayer(layer);
map.setCenter(
  new OpenLayers.LonLat(position.coords.latitude,position.coords.longitude).transform(
  new OpenLayers.Projection("EPSG:4326"),
  map.getProjectionObject()
  ), 12
); 

1 个答案:

答案 0 :(得分:2)

如果您尝试了多个投影,并且都导致相同的结果,可能是因为Proj4js未正确加载(请参阅http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js

也请查看此示例:http://openlayers.org/dev/examples/osm.html(从EPSG重新投影:4326)