背景描述：

实际项目中，需要对一个图层中的某个字段，分类型输出为单独的新图层。FME提供了Fanout工具。在没有FME的环境下，借助ArcGIS Desktop自带的python模块Arcpy，同样实现类似效果。

import arcpy
from arcpy import env
#设置工作空间
env.workspace = "D:/cad/newbuilding/NewBuilding.mdb/dataset"
#调用toolbox，CopyFeatures
arcpy.CopyFeatures_management("Floor7","Floor7Copy")
  <Result 'D:/cad/newbuilding/NewBuilding.mdb/dataset\\Floor7Copy'>
#打印图层字段名称
floorFields = arcpy.ListFields("Floor7")
for filed in floorFields:
  print field.name
#输出字段唯一值
values = [row[0] for row in arcpy.da.SearchCursor("Floor7",("Layer"))]
uniqueValues = set(values)
for v in uniqueValues:
  print v
#按唯一值输出图层
i = 0
for v in uniqueValues:
	wc = "Layer = '%s'"%v
	arcpy.MakeFeatureLayer_management("Floor7","LayerCopy%s_lyr"%i,wc)
	arcpy.CopyFeatures_management("LayerCopy%s_lyr"%i, "%s-%s"%(i,v))
	arcpy.Delete_management("LayerCopy%s_lyr"%i)
	i = i + 1
	print v

ArcMap按字段内容分类导出图形