javascript - 开放层功能

Question

为什么我无法向 Vector 添加功能？此代码不起作用:

var features = [new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(-70.702451, 42.374473), {className: "latarnia"})]

vectors = new OpenLayers.Layer.Vector("warstwa", {
strategies: [new OpenLayers.Strategy.Fixed()],
 protocol: new OpenLayers.Protocol.HTTP({
format: new OpenLayers.Format.OSM()
 }),
 features : features,
projection: new OpenLayers.Projection("EPSG:4326")});   

map.addLayers([vectors]);

我的意思是向量根本没有特征。我试过了

layer.addFeatures([feature]);

但它也失败了。

Answer 1

看来你的 map 和点的投影不一样。 map 投影是 EPSG:4326 ，但点投影似乎是 EPSG:3857 。

也许对你有帮助

conv_latlon = new OpenLayers.LonLat(-70.702451, 42.374473).transform('EPSG:3857', 'EPSG:4326')//transform point 
var features = [new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(conv_latlon.lon, conv_latlon.lat), {className: "latarnia"})]