写一个用于arcgis10.22工具箱的脚本:输入数据,然后根据图斑里其中一个字段的值相同、去把面积小于多少平方米参数值的图斑合并到相邻的图斑里去,在导出合并后的成果。
时间: 2023-11-22 21:55:33 浏览: 76
Arcgis插件_按属性合并小图斑.zip
下面是一个用于 ArcGIS 10.2.2 工具箱的 Python 脚本,可以根据指定字段的值将面积小于指定值的图斑合并到相邻的图斑中,并输出合并后的成果。
```python
# 导入必要的模块
import arcpy
# 设置工作空间及输入、输出数据的路径
arcpy.env.workspace = r"your_workspace_path"
in_features = "your_input_features.shp"
out_features = "your_output_features.shp"
# 设置合并条件,即指定的字段名和面积阈值
merge_field = "your_merge_field"
merge_threshold = "your_merge_threshold"
# 定义一个函数用于合并图斑
def merge_features(in_features, out_features, merge_field, merge_threshold):
# 判断输入数据是否存在
if not arcpy.Exists(in_features):
print("Error: Input features do not exist!")
return
# 创建一个空间索引以提高处理效率
arcpy.AddSpatialIndex_management(in_features)
# 使用游标遍历所有图斑
with arcpy.da.UpdateCursor(in_features, ["OID@", merge_field, "SHAPE@AREA"]) as cursor:
for row in cursor:
# 获取当前图斑的 OID、合并字段值和面积
oid = row[0]
merge_value = row[1]
area = row[2]
# 如果当前图斑的面积小于指定阈值,则查找相邻的图斑,并进行合并
if area < merge_threshold:
# 创建一个空间查询以查找相邻的图斑
query = arcpy.AddFieldDelimiters(in_features, merge_field) + " = '{}' AND OBJECTID <> {}".format(merge_value, oid)
nearby_features = [f[0] for f in arcpy.da.SearchCursor(in_features, ["SHAPE@"], query)]
if len(nearby_features) > 0:
# 合并相邻的图斑
merged_feature = row[2]
for nearby_feature in nearby_features:
merged_feature = merged_feature.union(nearby_feature)
arcpy.DeleteFeatures_management(nearby_feature)
row[2] = merged_feature
cursor.updateRow(row)
# 导出合并后的成果
arcpy.CopyFeatures_management(in_features, out_features)
# 调用函数进行图斑合并
merge_features(in_features, out_features, merge_field, merge_threshold)
```
请将上述代码保存为一个 `.py` 文件并将其中的路径和参数值替换为实际的值,然后将该文件添加到 ArcGIS 工具箱中即可使用。在使用时,请先选择输入数据和设置合并条件,然后单击运行按钮即可开始图斑合并的过程。
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