uccess为查询回调函数
            queryService.query(querySuccess, queryError);
        }
      
        function pntQuery()
        {
            clearA();
            if(drawTool!=null)
            {
                map.removeInteraction(drawTool);
            } 

            //实例化交互绘制类对象并添加到地图容器中
            drawTool = new ol.interaction.Draw({
                type: 'Point',
                //绘制层数据源
                source: interActionSource
        