用python写一个程序检查GDB中各个图层的接边问题,并用点图层标记接边错误,保存到该GDB下
时间: 2023-12-10 22:41:32 浏览: 22
以下是一个示例代码,用于检查GDB中各个图层的接边问题,并使用点图层标记接边错误:
```python
import arcpy
# 设置工作空间
arcpy.env.workspace = "path/to/your/gdb"
# 获取所有的要素图层
feature_classes = arcpy.ListFeatureClasses()
# 遍历所有的要素图层
for fc in feature_classes:
# 获取要素图层的元数据
desc = arcpy.Describe(fc)
# 如果要素图层是线图层
if desc.shapeType == "Polyline":
# 创建点图层用于标记接边错误
point_fc = arcpy.CreateFeatureclass_management(arcpy.env.workspace, fc + "_points", "POINT")
# 添加字段用于记录错误信息
arcpy.AddField_management(point_fc, "Error", "TEXT")
# 遍历所有的线要素
with arcpy.da.SearchCursor(fc, ["OID@", "SHAPE@"]) as cursor:
for row in cursor:
oid = row[0]
shape = row[1]
# 检查线要素的起点和终点是否与其他线要素的起点或终点重合
start_point = shape.firstPoint
end_point = shape.lastPoint
start_point_check = arcpy.PointGeometry(start_point).buffer(0.1)
end_point_check = arcpy.PointGeometry(end_point).buffer(0.1)
# 遍历所有的线要素
with arcpy.da.SearchCursor(fc, ["OID@", "SHAPE@"]) as inner_cursor:
for inner_row in inner_cursor:
inner_oid = inner_row[0]
inner_shape = inner_row[1]
# 排除自身要素
if oid != inner_oid:
inner_start_point = inner_shape.firstPoint
inner_end_point = inner_shape.lastPoint
# 判断起点是否重合
if start_point_check.contains(arcpy.PointGeometry(inner_start_point)) or start_point_check.contains(arcpy.PointGeometry(inner_end_point)):
# 创建错误点要素
error_point = arcpy.PointGeometry(start_point)
error_point_feature = arcpy.InsertCursor(point_fc).newRow()
error_point_feature.setValue("Error", "Start point connection error with feature OID: " + str(inner_oid))
error_point_feature.Shape = error_point
error_point_feature.OID = inner_oid
arcpy.InsertCursor(point_fc).insertRow(error_point_feature)
# 判断终点是否重合
if end_point_check.contains(arcpy.PointGeometry(inner_start_point)) or end_point_check.contains(arcpy.PointGeometry(inner_end_point)):
# 创建错误点要素
error_point = arcpy.PointGeometry(end_point)
error_point_feature = arcpy.InsertCursor(point_fc).newRow()
error_point_feature.setValue("Error", "End point connection error with feature OID: " + str(inner_oid))
error_point_feature.Shape = error_point
error_point_feature.OID = inner_oid
arcpy.InsertCursor(point_fc).insertRow(error_point_feature)
del cursor
del inner_cursor
```
这个示例代码可以检查所有的线图层,在检查过程中,如果发现某个线要素的起点或终点与其他线要素的起点或终点重合,则在点图层中创建一个错误点要素,并将错误信息记录在 "Error" 字段中。最后,将点图层保存到该GDB下。请注意,这个示例代码只是一个简单的演示,需要根据实际情况进行修改和优化。