利用arcpy检查线状要输的悬挂点,并输出悬挂点图层。
时间: 2024-04-08 11:33:51 浏览: 124
要利用 `arcpy` 检查线状要素的悬挂点并输出悬挂点图层,可以按照以下步骤进行操作:
1. 创建一个空的点要素类或图层,用于存储悬挂点。
2. 循环遍历线状要素集合。
3. 对于每个线要素,获取起始点和终点。
4. 判断起始点和终点是否与其他线要素相交。
5. 如果起始点或终点与其他线要素不相交,则将其添加到悬挂点图层中。
下面是一个简单的示例代码:
```python
import arcpy
# 输入的线状要素集合
input_features = "path/to/your/input_features.shp"
# 输出的悬挂点图层
output_feature_class = "path/to/your/output_suspended_points.shp"
# 创建空的点要素类或图层
arcpy.CreateFeatureclass_management(arcpy.env.workspace, "suspended_points", "POINT", spatial_reference=input_features)
# 添加字段
arcpy.AddField_management("suspended_points", "line_oid", "LONG")
# 插入游标
insert_cursor = arcpy.da.InsertCursor("suspended_points", ["SHAPE@", "line_oid"])
# 遍历线状要素集合
with arcpy.da.SearchCursor(input_features, ["SHAPE@", "OID@"]) as cursor:
for row in cursor:
line_geometry = row[0]
line_oid = row[1]
start_point = line_geometry.firstPoint
end_point = line_geometry.lastPoint
# 判断起始点是否与其他线要素相交
start_point_geometry = arcpy.PointGeometry(start_point, line_geometry.spatialReference)
intersecting_features = arcpy.Intersect_analysis([start_point_geometry, input_features], arcpy.Geometry())
if len(intersecting_features) == 1: # 如果只有起始点自身相交,则添加到悬挂点图层
insert_cursor.insertRow((start_point, line_oid))
# 判断终点是否与其他线要素相交
end_point_geometry = arcpy.PointGeometry(end_point, line_geometry.spatialReference)
intersecting_features = arcpy.Intersect_analysis([end_point_geometry, input_features], arcpy.Geometry())
if len(intersecting_features) == 1: # 如果只有终点自身相交,则添加到悬挂点图层
insert_cursor.insertRow((end_point, line_oid))
# 删除插入游标
del insert_cursor
# 将结果保存为要素类或图层
arcpy.CopyFeatures_management("suspended_points", output_feature_class)
```
请根据您的具体需求修改输入和输出的路径,确保路径正确。这段代码将根据您提供的线状要素集合,检查其中的悬挂点,并将悬挂点保存为一个新的点要素类或图层。
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