写一个适用于arcgis10.2的计算图斑面积的代码
时间: 2024-09-18 15:18:40 浏览: 48
ArcGis之地图服务发布
在ArcGIS 10.2中,你可以使用Python语言结合ArcPy库来计算图形要素(如图斑)的面积。下面是一个基本示例,假设你已经有了一个包含图斑几何信息的数据集:
```python
import arcpy
# 设置工作空间
arcpy.env.workspace = "your_workspace_path"
# 读取图层(这里假设是FeatureLayer)
feature_layer = "your_feature_layer_name"
# 获取图层的几何字段名,通常是SHAPE@AREA 或 AREA
area_field = "SHAPE@" if "SHAPE@" in arcpy.ListFields(feature_layer) else "AREA"
# 使用Cursor遍历图层并计算每个图斑的面积
with arcpy.da.SearchCursor(feature_layer, [area_field]) as cursor:
for row in cursor:
area_value = row[0]
print(f"图斑{i}的面积为: {area_value} 平方单位")
# 如果你想将结果保存到新的字段,可以这样做:
# arcpy.AddField_management(feature_layer, "Area", "DOUBLE")
# with arcpy.da.UpdateCursor(feature_layer, ["SHAPE@", "Area"]) as update_cursor:
# for row in update_cursor:
# row[1] = row[0].getArea()
# update_cursor.updateRow(row)
阅读全文