ArcGis Python脚本——将细碎小面合并到相邻的面积最大的面

 #polygon_fc 面要素类
 #area_limit 给定面积值，小于它的面会被合并
 polygon_fc="C:\Users\Administrator\Desktop\yang\New Folder\Export_Output_4.shp"
 area_limit=4000
 fieldList=arcpy.ListFields(polygon_fc)
 field_name_List=[]
 for field in fieldList:
     field_name_List.append(field.name)
 if 'Shape_Area' not in field_name_List :
     arcpy.AddField_management(polygon_fc,'Shape_Area','DOUBLE',field_precision=18,field_scale=6)
 arcpy.CalculateField_management(polygon_fc,'Shape_Area','!shape.area!','PYTHON_9.3')
 updateCursor=arcpy.UpdateCursor(polygon_fc,'Shape_Area<='+str(area_limit))
 for small_row in updateCursor:
     small_geometry=small_row.shape
     searchcursor = arcpy.SearchCursor(polygon_fc, 'Shape_Area>' + str(area_limit))
     areas=[]
     for row in searchcursor:
         geometry = row.shape
         if (small_geometry.touches(geometry)):
            areas.append(row.getValue('Shape_Area'))
     updateCursor1 = arcpy.UpdateCursor(polygon_fc, 'Shape_Area>' + str(area_limit))
     if len(areas)>0:
         area_max = max(areas)
         for row1 in updateCursor1:
             if (row1.getValue('Shape_Area') == area_max):
                 row1.shape = row1.shape.union(small_geometry)
                 updateCursor1.updateRow(row1)
                 updateCursor.deleteRow(small_row)
     del updateCursor1
 del updateCursor
 del searchcursor 

# code source： https://www.cnblogs.com/yzhyingcool/# QQ：975601416

 print '合并完成！'