python arcpy练习之面要素重叠拓扑检查(拓扑要素)

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。

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 os
import arcpy
import sys
reload(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 = 0
 fail = 0
 warning = 0
 fail_list = []
 warning_list = []
 arcpy.env.workspace = in_path
 workspaces = arcpy.ListWorkspaces("*", "ALL")
 for workspace in workspaces:
  arcpy.AddMessage("=" * 60)
  cout += 1
  arcpy.AddMessage(" (" + str(cout) + ") " + os.path.basename(workspace))
  arcpy.AddMessage("  ")
  try:
# 将每个gdb设为工作区
arcpy.env.workspace = workspace
fc_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gdb
gdb_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 += 1
 continue
arcpy.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 += 1
 arcpy.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)