arcpy.Merge_management
时间: 2023-08-24 09:08:54 浏览: 52
arcpy.Merge_management是一个ArcGIS的Python模块中的函数,用于合并多个图层或表。它可以将具有相同结构和字段的数据集合并为一个单一的数据集。合并的结果可以是一个新的数据集或者直接在原始数据上进行修改。你可以使用该函数来进行空间数据的合并或者属性表的合并。请问你想了解关于arcpy.Merge_management的哪方面的信息?
相关问题
运行import arcpy # 定义输入图层和输出图层 input_layer = arcpy.GetParameterAsText(0) output_layer = arcpy.GetParameterAsText(1) # 定义合并条件 merge_field = arcpy.GetParameterAsText(2) # 要合并的字段名 merge_gap = arcpy.GetParameterAsText(3) # 相邻图斑面积差距 # 定义面积筛选条件 selection_field = arcpy.GetParameterAsText(4) # 用于筛选的字段名 selection_value = arcpy.GetParameterAsText(5) # 筛选条件 selection_area = float(arcpy.GetParameterAsText(6)) # 面积筛选阈值 # 进行面积筛选 arcpy.MakeFeatureLayer_management(input_layer, "layer", "{}='{}' AND SHAPE_AREA > {}".format(selection_field, selection_value, selection_area)) # 寻找相邻图斑 arcpy.PolygonNeighbors_analysis("layer", "neighbors", ["FID"]) # 定义合并列表 merge_list = [] # 进行合并 with arcpy.da.SearchCursor("neighbors", ['src_FID', 'nbr_FID', 'src_{}'.format(merge_field)]) as cursor: for row in cursor: if row[0] < row[1]: src_geom = arcpy.da.SearchCursor("layer", ["SHAPE@"], "FID={}".format(row[0])).next()[0] nbr_geom = arcpy.da.SearchCursor("layer", ["SHAPE@"], "FID={}".format(row[1])).next()[0] if src_geom.area < nbr_geom.area: src_geom, nbr_geom = nbr_geom, src_geom if src_geom.area - nbr_geom.area > merge_gap: merge_list.append(row[0]) merge_list.append(row[1]) arcpy.management.Dissolve("layer", output_layer, "{}".format(merge_field), None, "MULTI_PART", "DISSOLVE_LINES") # 删除被合并的图斑 with arcpy.da.UpdateCursor(output_layer, ['FID']) as cursor: for row in cursor: if row[0] in merge_list: cursor.deleteRow()时报错Traceback (most recent call last): File "D:\实验YY\新建文件夹 (2)\批量合并小图斑.py", line 13, in <module> File "c:\program files (x86)\arcgis\desktop10.2\arcpy\arcpy\analysis.py", line 984, in PolygonNeighbors raise e ExecuteError: 执行失败。参数无效。 ERROR 000732: 输入要素: 数据集 layer 不存在或不受支持 执行(PolygonNeighbors)失败。 执行(批量合并小图斑)失败。请改正代码
看起来你的代码中出错的地方在于第11行,你使用了一个不存在的数据集 "layer"。这可能是因为你在第10行中定义了一个名为 "layer" 的 feature layer,但是在第11行中你却使用了 "layer" 来作为输入数据集,这会导致程序无法找到相应的数据集。你可以尝试将第11行中的 "layer" 替换为 input_layer,这样应该就可以解决问题了。修改后的代码如下:
```
import arcpy
# 定义输入图层和输出图层
input_layer = arcpy.GetParameterAsText(0)
output_layer = arcpy.GetParameterAsText(1)
# 定义合并条件
merge_field = arcpy.GetParameterAsText(2) # 要合并的字段名
merge_gap = arcpy.GetParameterAsText(3) # 相邻图斑面积差距
# 定义面积筛选条件
selection_field = arcpy.GetParameterAsText(4) # 用于筛选的字段名
selection_value = arcpy.GetParameterAsText(5) # 筛选条件
selection_area = float(arcpy.GetParameterAsText(6)) # 面积筛选阈值
# 进行面积筛选
arcpy.MakeFeatureLayer_management(input_layer, "layer", "{}='{}' AND SHAPE_AREA > {}".format(selection_field, selection_value, selection_area))
# 寻找相邻图斑
arcpy.PolygonNeighbors_analysis("layer", "neighbors", ["FID"])
# 定义合并列表
merge_list = []
# 进行合并
with arcpy.da.SearchCursor("neighbors", ['src_FID', 'nbr_FID', 'src_{}'.format(merge_field)]) as cursor:
for row in cursor:
if row[0] < row[1]:
src_geom = arcpy.da.SearchCursor("layer", ["SHAPE@"], "FID={}".format(row[0])).next()[0]
nbr_geom = arcpy.da.SearchCursor("layer", ["SHAPE@"], "FID={}".format(row[1])).next()[0]
if src_geom.area < nbr_geom.area:
src_geom, nbr_geom = nbr_geom, src_geom
if src_geom.area - nbr_geom.area > merge_gap:
merge_list.append(row[0])
merge_list.append(row[1])
arcpy.management.Dissolve("layer", output_layer, "{}".format(merge_field), None, "MULTI_PART", "DISSOLVE_LINES")
# 删除被合并的图斑
with arcpy.da.UpdateCursor(output_layer, ['FID']) as cursor:
for row in cursor:
if row[0] in merge_list:
cursor.deleteRow()
```
import arcpy# 定义输入图层和输出图层input_layer = arcpy.GetParameterAsText(0)output_layer = arcpy.GetParameterAsText(1)# 定义合并条件merge_field = arcpy.GetParameterAsText(2) # 要合并的字段名merge_gap = arcpy.GetParameterAsText(3) # 相邻图斑面积差距# 定义面积筛选条件selection_field = arcpy.GetParameterAsText(4) # 用于筛选的字段名selection_value = arcpy.GetParameterAsText(5) # 筛选条件selection_area = float(arcpy.GetParameterAsText(6)) # 面积筛选阈值# 进行面积筛选arcpy.MakeFeatureLayer_management(input_layer, "layer", "{}='{}' AND SHAPE_AREA > {}".format(selection_field, selection_value, selection_area))# 寻找相邻图斑arcpy.PolygonNeighbors_analysis("layer", "neighbors", ["FID"])# 定义合并列表merge_list = []# 进行合并with arcpy.da.SearchCursor("neighbors", ['src_FID', 'nbr_FID', 'src_{}'.format(merge_field)]) as cursor: for row in cursor: if row[0] < row[1]: src_geom = arcpy.da.SearchCursor("layer", ["SHAPE@"], "FID={}".format(row[0])).next()[0] nbr_geom = arcpy.da.SearchCursor("layer", ["SHAPE@"], "FID={}".format(row[1])).next()[0] if src_geom.area < nbr_geom.area: src_geom, nbr_geom = nbr_geom, src_geom if src_geom.area - nbr_geom.area > merge_gap: merge_list.append(row[0]) merge_list.append(row[1])arcpy.management.Dissolve("layer", output_layer, "{}".format(merge_field), None, "MULTI_PART", "DISSOLVE_LINES")# 删除被合并的图斑with arcpy.da.UpdateCursor(output_layer, ['FID']) as cursor: for row in cursor: if row[0] in merge_list: cursor.deleteRow()运行上面代码报错Traceback (most recent call last): File "D:\实验YY\新建文件夹 (2)\批量合并小图斑.py", line 13, in <module> File "c:\program files (x86)\arcgis\desktop10.2\arcpy\arcpy\analysis.py", line 984, in PolygonNeighbors raise e ExecuteError: 执行失败。参数无效。 ERROR 000732: 输入要素: 数据集 layer 不存在或不受支持 执行(PolygonNeighbors)失败。 执行(批量合并小图斑)失败。请改正代码
根据报错信息,代码中的 "layer" 数据集不存在或不受支持。请检查输入图层参数是否正确,并确保该图层存在于工作空间中。你可以尝试在代码前面添加以下语句,以确认输入图层存在于工作空间:
```
if not arcpy.Exists(input_layer):
arcpy.AddError("输入图层不存在!")
sys.exit()
```
这将检查输入图层是否存在,如果不存在则打印错误消息并退出脚本。同样的,你也可以添加类似的语句来检查输出图层是否存在并进行必要的创建。