使用python脚本执行地理处理工具

时间:2019-12-02 the_path_of_grace 人气:1

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：

 1 # Name: Clip_Example2.py
 2 
 3 # Description: Clip major roads that fall within the study area.
 4 
 5 
 6 # Import system modules
 7 
 8 import arcpy
 9 
10 from arcpy import env
11 
12 
13 # Set workspace
14 
15 env.workspace = "F:\【the_path_of_grace】\ArcpyBook"
16 
17  
18 # Set local variables
19 
20 in_features = "data/CityOfSanAntonio.gdb/Burglary"
21 
22 clip_features = "Ch5/EdgewoodSD.shp"
23 
24 out_feature_class = "Ch5/ClpBurglary.shp"
25 
26 xy_tolerance = ""
27 
28 
29 # Execute Clip
30 
31 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：

 1 # Import system modules
 2 import arcpy
 3 from arcpy import env
 4 
 5 # Set workspace
 6 env.workspace = "F:\【the_path_of_grace】\ArcpyBook\data\TravisCounty"
 7 try:
 8 # Buffer areas of impact around major roads
 9     streams = "Streams.shp"
10     streamsBuffer = "StreamsBuffer"
11     distanceField = "2640 Feet"
12     sideType = "FULL"
13     endType = "ROUND"
14     dissolveType = "ALL"
15     schools2mile = "Schools.shp"
16     schoolsLyrFile = 'Schools2Mile_lyr'
17     
18     arcpy.Buffer_analysis(streams, streamsBuffer, distanceField,sideType,endType,dissolveType)
19 
20 # First, make a layer from the feature class
21     arcpy.MakeFeatureLayer_management(schools2mile, schoolsLyrFile)
22 
23 # Then add a selection to the layer based on location to features in another feature class 
24     arcpy.SelectLayerByLocation_management (schoolsLyrFile, "intersect", streamsBuffer)
25 except Exception as e:
26     print e.message

执行过程：

效果图：

谢谢观看！

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