我想在地图上放置一个符号。例如:
到目前为止,我使用了OpenLayers和OpenLayers.Layer.Markers
。 代码如下:
map = new OpenLayers.Map('map');
layer = new OpenLayers.Layer.OSM( "Simple OSM Map");
map.addLayer(layer);
map.setCenter(
new OpenLayers.LonLat({{ location.lon }}, {{ location.lat }}).transform(
new OpenLayers.Projection("EPSG:4326"),
map.getProjectionObject()
), 15);
var lonLat = new OpenLayers.LonLat({{ location.lon }}, {{ location.lat }})
.transform(
new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
map.getProjectionObject() // to Spherical Mercator Projection
);
var markers = new OpenLayers.Layer.Markers( "Markers" );
map.addLayer(markers);
markers.addMarker(new OpenLayers.Marker(lonLat));
这段代码正常运行并显示地图。但是我无法使用向量替换最后三行来使其工作:
vectors = new OpenLayers.Layer.Vector("Vector Layer");
vectors.addFeatures([new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(lonLat))]);
map.addLayer(vectors);
使用OpenLayers.Feature.Vector
是否需要特殊魔法?