openlayers实现wfs属性查询和空间查询

概述：

一直在寻求openlayers中wfs加载和属性查询的相关操作，功夫不负有心人，蓦然回首，那人却在灯火阑珊处，找到了这篇博文：http://blog.csdn.net/longshengguoji/article/details/39377931，试了下，在IE8中正常运行，但是在chrom中涉及到跨域的问题，待后期接解决吧。本文讲解如何通过wfs实现属性的查询与展示。

效果：

初始化状态

属性查询结果

空间查询结果

数据表：

关键代码：

添加wfs图层

            wfs = new OpenLayers.Layer.Vector("wfs", {
                strategies: [new OpenLayers.Strategy.Fixed()],
                visibility:true,
                protocol: new OpenLayers.Protocol.WFS({
                    url: "http://localhost:8081/geoserver/lzugis/wfs?",
                    featureType: "capital",
                    featurePrefix : "lzugis",
                    featureNS: "http://www.lzugis.com.cn",
                    srsName : "EPSG:4326",
                    geometryName:"the_geom"
                })
            });
            map.addLayer(wfs);

查询条件面板

    
        编码
        拼音
    
     
    属性查询 
    空间查询



 执行属性查询查询


            $("#query").on("click",function(){
                var field = $("#field").val();
                var val = $("#val").val();
                var filter = new OpenLayers.Filter.Comparison({
                    type : OpenLayers.Filter.Comparison.EQUAL_TO,
                    property : field,
                    value : val
                });
                console.log(wfs);
                wfs.filter = filter;
                wfs.refresh();
            })


空间查询

            var drawLayer = new OpenLayers.Layer.Vector("drawLayer",{
                styleMap: new OpenLayers.StyleMap({'default':{
                    strokeColor: "#ff0000",
                    strokeOpacity: 1,
                    strokeWidth: 1,
                    fillColor: "#000000",
                    fillOpacity: 0.1
                }})
            });
            map.addLayer(drawLayer);
            var drawBox = new OpenLayers.Control.DrawFeature(drawLayer,
                    OpenLayers.Handler.RegularPolygon,{
                        handlerOptions: {
                            sides: 4,
                            irregular: true
                        }
                    }
            );
            map.addControl(drawBox);
            drawBox.featureAdded = onEndDraw;

            function onEndDraw(feature){
                drawBox.deactivate();
                console.info(feature);
                var geometry = feature.geometry;
                var filter = new OpenLayers.Filter.Spatial({
                    type : OpenLayers.Filter.Spatial.INTERSECTS,
                    value : geometry,
                    projection : 'EPSG:4326'
                });
                wfs.filter = filter;
                wfs.refresh();
                map.zoomToExtent(wfs.getDataExtent());
            }
            $("#boxQuery").on("click",function(){
                drawLayer.removeAllFeatures();
                wfs.filter = null;
                wfs.refresh();
                drawBox.activate();
            });



 完整代码为：




    
    
    
    
    
    
    
    



    
        编码
        拼音
    
     
    属性查询 
    空间查询

转载于:https://www.cnblogs.com/lzugis/p/6539823.html