写一个arcgis工具箱脚本代码:可以进行连接要素中多个图斑叠加目标要素其中一个图斑时,取连接要素中多个图斑面积大于多少值的图斑利用空间连接把所有值赋值到目标要素图斑里,多个图斑相同字段值赋值到一个目标要素图斑字段时,用"/"隔开并赋值进去,最终导出成果
时间: 2023-12-03 08:44:55 浏览: 73
以下是一个基本的ArcGIS工具箱脚本代码:
```python
import arcpy
# 输入参数
input_features = arcpy.GetParameterAsText(0) # 连接要素
join_field = arcpy.GetParameterAsText(1) # 连接字段
target_feature = arcpy.GetParameterAsText(2) # 目标要素
target_field = arcpy.GetParameterAsText(3) # 目标字段
area_threshold = arcpy.GetParameterAsText(4) # 面积阈值
# 创建空间连接
arcpy.SpatialJoin_analysis(input_features, target_feature, "in_memory/spatial_join", "JOIN_ONE_TO_ONE", "KEEP_ALL", "", "INTERSECT")
# 选择面积大于阈值的连接要素
arcpy.Select_analysis("in_memory/spatial_join", "in_memory/selected_features", "Shape_Area > " + area_threshold)
# 统计相同连接字段值的面积总和
arcpy.Statistics_analysis("in_memory/selected_features", "in_memory/summarized_features", "Shape_Area SUM", join_field)
# 创建字典,存储连接字段值和对应的面积总和
sum_dict = {}
with arcpy.da.SearchCursor("in_memory/summarized_features", [join_field, "SUM_Shape_Area"]) as cursor:
for row in cursor:
sum_dict[row[0]] = row[1]
# 更新目标要素中的字段值
with arcpy.da.UpdateCursor(target_feature, [target_field, join_field]) as cursor:
for row in cursor:
join_value = row[1]
if join_value in sum_dict:
area_sum = sum_dict[join_value]
row[0] = str(area_sum)
cursor.updateRow(row)
# 导出结果
arcpy.CopyFeatures_management(target_feature, arcpy.GetParameterAsText(5))
```
此代码实现的功能是,将连接要素中面积大于给定阈值的图斑利用空间连接与目标要素进行叠加,并将连接要素中相同连接字段值的面积总和赋值到目标要素中。如果多个连接要素相同字段值赋值到一个目标要素字段时,会用斜杠“/”进行分隔并赋值。最终导出结果。
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