使用python脚本执行地理处理工具

桌面ArcGIS包含800多种可在Python脚本中运行的地理处理工具。

通过Python脚本来运行地理处理工具，可以处理复杂的工作和执行批处理任务。

案例一：使用脚本执行地理处理工具（以裁剪为例）

查看帮助文档模仿的代码：

 # Name: Clip_Example2.py

 # Description: Clip major roads that fall within the study area.

 # Import system modules

 import arcpy

 from arcpy import env

 # Set workspace

 env.workspace = "F:\【the_path_of_grace】\ArcpyBook"

 # Set local variables

 in_features = "data/CityOfSanAntonio.gdb/Burglary"

 clip_features = "Ch5/EdgewoodSD.shp"

 out_feature_class = "Ch5/ClpBurglary.shp"

 xy_tolerance = ""

 # Execute Clip

 arcpy.Clip_analysis(in_features, clip_features, out_feature_class, xy_tolerance)

工作原理：

在Python脚本中，可以参照<toolname>_<toolboxalias>语法来调用工具。

注：toolboxalias是工具箱的别名

拓展：

效果图：

案例二：将一个工具的输出作为另一个工具的输入

步骤：①缓冲区分析->②创建要素图层->③按位置选择图层

查看帮助文档模仿的代码：

 # Import system modules
 import arcpy
 from arcpy import env

 # Set workspace
 env.workspace = "F:\【the_path_of_grace】\ArcpyBook\data\TravisCounty"
 try:
 # Buffer areas of impact around major roads
     streams = "Streams.shp"
     streamsBuffer = "StreamsBuffer"
     distanceField = "2640 Feet"
     sideType = "FULL"
     endType = "ROUND"
     dissolveType = "ALL"
     schools2mile = "Schools.shp"
     schoolsLyrFile = 'Schools2Mile_lyr'

     arcpy.Buffer_analysis(streams, streamsBuffer, distanceField,sideType,endType,dissolveType)

 # First, make a layer from the feature class
     arcpy.MakeFeatureLayer_management(schools2mile, schoolsLyrFile)

 # Then add a selection to the layer based on location to features in another feature class
     arcpy.SelectLayerByLocation_management (schoolsLyrFile, "intersect", streamsBuffer)
 except Exception as e:
     print e.message 

执行过程：

效果图：

谢谢观看！