0.1;
            GeomQuery(geomObj);
        }

       
        function polygonQuery()
        {   
            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: 'Polygon',
                //绘制层数据源
                source: interActionSource
            });
            map.addInteracti