OpenLayers使用多边形选择要素

试图使用这个- 例如： 我有选择功能（框），它允许我选择图层上的功能。但它是盒式的。 现在，我正试图作出同样的选择，但与多边形的风格。类似于绘制新多边形，但将选择该多边形内的内容。 我是否在正确的道路上尝试使用这个SLD选择，还是有其他更好的方法

对任何解决方案都持开放态度

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谢谢。

来自GIS StackEchange网站：

function buildIt() {//START FUNCTION buildIt

//CREATE A NEW EMPTY VECTOR LAYER 
var polygonAdHoc = new OpenLayers.Layer.Vector("Poly Layer");
//ADD THE NEW VECTOR LAYER TO THE OPENLAYERS MAP
map.addLayer(polygonAdHoc);
//SET A VARIABLE TO THE NAME OF THE EXISTING LAYER THAT WILL BE TESTED FOR INTERSECTION WITH THE USER CREATED POLYGON
//I CHOSE TO GET THE LAYER BY NAME BUT YOU MIGHT CHOOSE TO DO IT ANOTHER WAY
var standLyr = map.getLayersByName("nameOfTheVectorLayerYouWantToTestForIntersection");

//CREATE A DRAW FEATURE CONTROL FOR THE USER CREATED VECTOR LAYER
var draw = new OpenLayers.Control.DrawFeature(polygonAdHoc, OpenLayers.Handler.Polygon);
//ADD THE DRAW FEATURE CONTROL TO THE MAP
map.addControl(draw);
//ACTIVATE THE DRAW FEATURE CONTROL
draw.activate();

//WHEN THE USER FINISHES DRAWING THE AD-HOC POLYGON THE beforefeatureadded EVENT WILL FIRE
polygonAdHoc.events.on({
    beforefeatureadded: function (event) {
        poly = event.feature.geometry;//SET A VARIABLE TO THE USERDRAWN POLYGONS GEOMETRY
        //alert("polygonAdHoc.features[0].geometry: " + poly);//IF YOU WANT TO SEE THE GEOMETRY COORDINATES UNCOMMENT THIS LINE
        for (var a = 0; a < standLyr[0].features.length; a++) {//LOOP THRU THE STANDS FEATURES OF THE LAYER YOU WANT TO TEST FOR INTERSECTION WITH THE USER DRAWN POLYGON
            if (poly.intersects(standLyr[0].features[a].geometry)) {//IF THE USER DRAWN POLYGON INTERSECTS THE TARGET LAYERS FEATURE REPRESENTED BY THE VARIABLE "a" THEN
                 //IDENTIFY THE FEATURE THAT INTERSECTS 
                 //FOR SIMPLICITIES SAKE I CHOSE TO JUST FIRE AN ALERT
                 //MY ACTUAL APP ADDS EACH SELECTED FEATURE TO A SELECT FEATURE CONTROL AND HIGHLIGHTS EACH POLYGON ON THE MAP                
                 alert("stands feature intersection: " +  standLyr[0].features[a].attributes['nameOfAttribute']);
            }//END OF IF STATEMENT
        }//END OF FOR STATEMENT
        draw.deactivate();//I ONLY WANT THE USER TO BE ABLE TO DRAW ONE AD-HOC POLYGON
        //SO I DEACTIVATE THE DRAW FEATURE CONTROL AFTER THEY CREATE THE FIRST POLYGON
        return false;
    }//END OF beforefeatureadded FUNCTION
});//END OF polygonAdHoc.events.on
}//END OF buildIt FUNCTION

函数buildIt（）{//启动函数buildIt
//创建一个新的空向量层
var polygodhoc=新的OpenLayers.Layer.Vector（“多边形层”）；
//将新矢量层添加到OPENLAYERS贴图
map.addLayer（多边形DHOC）；
//将变量设置为将测试与用户创建的多边形相交的现有图层的名称
//我选择按名称获取图层，但您可以选择另一种方式
var standLyr=map.getLayersByName（“矢量图层的名称youwanttotestforintersection”）；
//为用户创建的矢量图层创建绘制特征控件
var draw=new OpenLayers.Control.DrawFeature（polygonAdHoc，OpenLayers.Handler.Polygon）；
//将绘制要素控件添加到地图
map.addControl（draw）；
//激活“绘制特征”控件
draw.activate（）；
//当用户完成绘制特殊多边形时，将触发beforefeatureadded事件
多哥节事件({
添加BeforeFeature:函数（事件）{
poly=event.feature.geometry；//将变量设置为用户绘制的多边形几何体
//警报（“polygodhoc.features[0]。几何体：+poly）；//如果要查看几何体坐标，请取消对此行的注释
对于（var a=0；a

在这个plunker中，我使用了interaction.Draw创建了一个多边形。多边形完成后，它将查找多边形范围中的所有要素点并选择它们

以下是

draw.on（'draund'），…

listener的摘录：

draw.on('drawend', function(e) {

  e.preventDefault();
  //stop a click select from overriding selection made by polygon
  setTimeout(function(){
    select.setActive(true)
  },300);

  // features that intersect the box are added to the collection of
  // selected features, and their names are displayed in the "info"
  // div
  var extent = e.feature.getGeometry().getExtent();

  //pointsLayer is the vector layer with the point features
  pointsLayer.getSource().forEachFeatureIntersectingExtent(extent, function(feature) {
    selectedFeatures.push(feature);
  });

});

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你找到答案了吗？大概是第2版吧？是的。当问到问题或给出我的答案时，OpenLayers v3并没有出现。