python|python arcpy练习之面要素重叠拓扑检查 pythonarcpy练习之面要素重叠拓扑

需求
思路
代码
效果图
总结

需求有多个文件地理数据库（gdb），数据库内有多个面要素类图层，每个图层不能有自重叠，也不能和其他图层重叠。所以，需要为每个文件地理数据库（gdb）进行拓扑检查。

思路 1.在输出文件夹下新建与输入文件夹下同名的gdb。
2.在gdb内新建要素类数据集。
3.在数据集内创建拓扑。
4.向拓扑中添加要素类。
5.添加拓扑规则。
6.拓扑验证。
7.导出拓扑错误。

文章图片

将需要拓扑的gdb放入同一个文件夹下，用python代码串连起来利用循环遍历gdb便可以进行批量拓扑了。

代码

# -*- coding: gbk -*-import osimport arcpyimport sysreload(sys)sys.setdefaultencoding('utf-8')arcpy.AddMessage(sys.getdefaultencoding())arcpy.env.XYResolution = "0.0001 Meters" #设置XY分辨率arcpy.env.XYTolerance = "0.001 Meters"#设置XY容差def checkTopology(in_path, out_path):cout = 0fail = 0warning = 0fail_list = []warning_list = []arcpy.env.workspace = in_pathworkspaces = arcpy.ListWorkspaces("*", "ALL")for workspace in workspaces:arcpy.AddMessage("=" * 60)cout += 1arcpy.AddMessage(" (" + str(cout) + ") " + os.path.basename(workspace))arcpy.AddMessage("")try:# 将每个gdb设为工作区arcpy.env.workspace = workspacefc_list = arcpy.ListFeatureClasses() #列出gdb内的要素类图层in_fc_path_list = []for fc in fc_list:in_fc_path_list.append(os.path.join(workspace,fc))# 在输出路径out_path下新建gdbgdb_name1 = os.path.basename(workspace)result_gdb = os.path.join(out_path, gdb_name1)if not arcpy.Exists(result_gdb):arcpy.AddMessage("新建 " + result_gdb + " ...")arcpy.CreateFileGDB_management(out_path, gdb_name1)else:arcpy.AddWarning(result_gdb + " 已存在！")warning_list.append(result_gdb)warning += 1continuearcpy.AddMessage("在 " + result_gdb + " 内新建要素数据集...")dataset_name = "dataset"dataset_path = os.path.join(result_gdb,dataset_name)# 引用包含要应用的空间参考的要素类或要素数据集，# 将in_fc_path_list[0]的坐标作为要素数据集的坐标，所以gdb内的所有要素类应该是统一坐标arcpy.CreateFeatureDataset_management(result_gdb, dataset_name, in_fc_path_list[0])#导入要素类到数据集arcpy.AddMessage("向 " + dataset_path + " 导入要素类图层...")arcpy.FeatureClassToGeodatabase_conversion(in_fc_path_list,dataset_path)#在dataset数据内创建拓扑arcpy.AddMessage("创建拓扑...")topology_name = "topology"topology_path = os.path.join(dataset_path, topology_name)arcpy.CreateTopology_management(dataset_path, topology_name)# 将导入dataset的要素类添加到拓扑中arcpy.AddMessage("向拓扑中添加要素类...")dataset_fc_path_lsit = []#数据集中的要素类绝对路径列表for ifc_name in fc_list:# 拼接数据集中的要素类绝对路径dataset_fc_path = os.path.join(dataset_path,ifc_name)dataset_fc_path_lsit.append(dataset_fc_path)arcpy.AddFeatureClassToTopology_management(topology_path, dataset_fc_path, "1", "1")arcpy.AddMessage("添加拓扑规则...")for i in range(len(dataset_fc_path_lsit)):fc_path1 = dataset_fc_path_lsit[i]#规则1：不能重叠arcpy.AddRuleToTopology_management(topology_path, "Must Not Overlap (Area)", fc_path1, "", "", "")for j in range(i + 1, len(dataset_fc_path_lsit)):fc_path2 = dataset_fc_path_lsit[j]# 规则2：不能重叠与其他要素类重叠arcpy.AddRuleToTopology_management(topology_path, "Must Not Overlap With (Area-Area)", fc_path1, "", fc_path2, "")arcpy.AddMessage("拓扑验证...")arcpy.ValidateTopology_management(topology_path, "Full_Extent")arcpy.AddMessage("导出拓扑错误...")arcpy.ExportTopologyErrors_management(topology_path, dataset_path, "topoError")except Exception as e:arcpy.AddError(e.message)arcpy.AddError("" + os.path.basename(workspace) + " 失败！")fail_list.append(os.path.basename(workspace))fail += 1arcpy.AddMessage('+' * 60)arcpy.AddMessage(u"成功：" + str(cout - fail - warning) + u" 个！")if warning > 0:arcpy.AddWarning(u"警告：" + str(warning) + u" 个！如下：")arcpy.AddWarning("####" + '*' * 20)for fff in warning_list:arcpy.AddWarning("" + fff)arcpy.AddWarning("####" + '*' * 20)if fail > 0:arcpy.AddError(u"失败：" + str(fail) + u" 个！如下：")arcpy.AddError("####" + '*' * 20)for ff in fail_list:arcpy.AddError("" + ff)arcpy.AddError("####" + '*' * 20)arcpy.AddMessage('+' * 60)if __name__ == "__main__":in_path_globle = arcpy.GetParameterAsText(0)out_path_globe = arcpy.GetParameterAsText(1)checkTopology(in_path_globle,out_path_globe)

效果图