Question

我有一个刺激，我从服务器，我需要循环它。这个字符串实际上是我希望使用openLayers在地图中可视化的位置的地理位置。以下是返回字符串的示例：

{crs:
    {"type":"name",
     "properties":{
            "name":"ESPG:4326"
      },
     },
     "features":[{"properties":{
                 "image":"IMAGE1"},
                 "type":"Feature",
                 "geometry":{
                           "type":"Point",
                           "coordinates":[0,0]
                  }},{"properties":{
                 "image":"IMAGE2"},
                 "type":"Feature",
                 "geometry":{
                           "type":"Point",
                           "coordinates":[10,10]
                  }},{"properties":{
                 "image":"IMAGE3"},
                 "type":"Feature",
                 "geometry":{
                           "type":"Point",
                           "coordinates":[75,99]
                  }}]
        ,type:"FeatureCollection"
}

正如您所看到的feature features properties有geometry和layer。我想创建一个新的//map is the actual map where the images load //responseText is the String that I get from the server //predefinedImage is actually a predefined image that I use as icon for the points. //If I complitelly remove the "style" from geojson_layer it sets the image to a default value. var geoJSONsource = new ol.source.Vector({ features: (new ol.format.GeoJSON()).readFeatures(responseText) }); geojson_layer = new ol.layer.Vector({ source: geoJSONsource, style: predefinedImage }); map.addLayer(geojson_layer);（ol.layer.Vector），对于每个要素元素，将使用相应的坐标和图像绘制一个点。使用以下代码，我可以设法使用预定义的图像绘制地图中的所有点。我想我应该遍历这个字符串并获取坐标和图像，并以某种方式创建一个图层（或许多图层？），并将这些值作为源和样式相应地。任何想法??谢谢！

$myParams[] = array('nome_Campo' => 'Barcode', 'valore' => $barcode);
$myParams[] = array('nome_Campo' => 'DOC_DATE min', 'valore' => $datai);
$myParams[] = array('nome_Campo' => 'DOC_DATE max', 'valore' => $newdate);

$params = array(
    "arg0" => $sasAliasSP,  
    "arg1" => $sasAliasDA,
    "arg2" => "",
    "arg3" => $myParams,
    "arg4" => "",
    "arg5" => "0",
    "arg6" => "1000"
);

Answer 1

这可能会对您有所帮助：

https://gis.stackexchange.com/a/95389/77349

你应该修改这一行：

externalGraphic: 'marker.png',

类似

externalGraphic: this.image,

希望这有帮助！

为每组坐标绘制一个具有不同样式的openLayers图层

1 个答案: