ArcGIS开发之geometryService的relatio

坐标转换

将原始坐标转换成wkid:32652坐标，并且使用回调将数据返回

back.coordinateConvert = function(geometry,callback){
    var geometryService = new GeometryService(baseURL+"/Utilities/Geometry/GeometryServer");            
     var params = new ProjectParameters();
      params.geometries = [geometry];
      params.outSR = new SpatialReference(32652);
      geometryService.project(params).then(function(resGeometry){
          callback(resGeometry);
      })
}

数据查询

区域图层数据查询，并且使用回调将数据返回

back.getReginData = function(callback){
  var query = new Query();
  query.where = "1=1";
  query.returnGeometry = true;
  query.outFields = ["*"];
  var queryTask = new QueryTask("http://localhost:6080/arcgis/rest/services/dt1124/MapServer/18");
  queryTask.execute(query,function(response){
      callback(response);
  })
}

relation

用于判断geometry之间的关系，如相交，包含，相切等

back.relation = function(geometries1,geometries2){
    var geometryService = new GeometryService(baseURL+"Utilities/Geometry/GeometryServer");
    var relationParams = new RelationParameters();
    relationParams.geometries1 = geometries1;
    relationParams.geometries2 = geometries2;
    relationParams.relation = RelationParameters.SPATIAL_REL_INTERSECTION;
    var result = geometryService.relation(relationParams);
    return result;
}

SPATIAL_REL_INTERSECTION:相交。可选择不同的关系
返回值result是个Deferred对象，调用时：

var relation = back.relation(resGeometry,geometryArray);
relation.then(function(data){
    console.dir(data);
})

结果如下图所示：

image.png

表示存在两个相交关系：geometries1[0]与geometries2[3]相交，geometries1[1]与geometries2[0]相交