Python ArcGIS MapView.clear_graphics用法及代碼示例

本文簡要介紹 python 語言中 arcgis.widgets.MapView.clear_graphics 的用法。

用法:

clear_graphics()

clear_graphics 方法清除在Map小部件上繪製的圖形。

注意：

圖形是使用 draw 方法繪製的形狀。

例子：

#Usage Example: Drawing two Geometry objects on a map widget.

>>> from arcgis.gis import GIS, Item
>>> from arcgis.widgets import MapView
>>> from arcgis.geometry import Geometry, Polygon

>>> geom = Geometry({
                "rings" : [[[-97.06138,32.837],[-97.06133,32.836],[-97.06124,32.834],[-97.06127,32.832],
                            [-97.06138,32.837]],[[-97.06326,32.759],[-97.06298,32.755],[-97.06153,32.749],
                            [-97.06326,32.759]]],
                "spatialReference" : {"wkid" : 4326}
                })
>>> map2 = gis.map("Arlington, Texas")
>>> map2.draw(shape=geom)
>>> map2
<Map Widget Displayed with the drawn Polygons>
>>> map2.clear_graphics()
>>> map2
<Map Widget Displayed without the drawn Polygons>