提取shp四至坐标

利用ArcGIS提取shp四至坐标，以下是源代码。

# -*- coding: utf-8 -*-  

# Import arcpy module  

import arcpy  

Shp = arcpy.GetParameterAsText(0)  

if Shp == '#' or not Shp:  

  Shp ="shp" # provide a default value if unspecified  

maxX = Shp  

maxY = maxX  

minX = maxY  

minY = minX  

minYC = minY  

minXC = minYC  

maxYC = minXC  

maxXC = maxYC  

arcpy.AddField_management(Shp,"maxX", "TEXT", "", "", "50", "", "NULLABLE", "NON_REQUIRED", "")  

arcpy.AddField_management(maxX,"maxY", "TEXT", "", "", "50", "", "NULLABLE", "NON_REQUIRED", "")  

arcpy.AddField_management(maxY,"minX", "TEXT", "", "", "50", "", "NULLABLE", "NON_REQUIRED", "")  

arcpy.AddField_management(minX,"minY", "TEXT", "", "", "50", "", "NULLABLE", "NON_REQUIRED", "")  

arcpy.CalculateField_management(minY,"minY", "!shape.extent.ymin!", "PYTHON_9.3", "")  

arcpy.CalculateField_management(minYC,"minX", "!shape.extent.xmin!", "PYTHON_9.3", "")  

arcpy.CalculateField_management(minXC,"maxY", "!shape.extent.ymax!", "PYTHON_9.3", "")  

arcpy.CalculateField_management(maxYC,"maxX", "!shape.extent.xmax!", "PYTHON_9.3", "")