Arcpy使用入门

2.7Python(目前ArcGIS使用)代码转化为3.5Python(目前ArcGIS Pro使用)代码—-Analyze Tools For Pro (2to3命令)

基本操作

调用ArcToolbox的两种形式

#arcpy.ToolboxAlias.ToolName()#arcpy.ToolName_ToolboxAlias()#ToolboxAlias工具箱别名#ToolName工具名称arcpy.analysis.Buffer(in_features="bjboundary", out_feature_class="G:/实习文件/map/buf_Boundary.shp", buffer_distance_or_field="0.5 Unknown", line_side="FULL", line_end_type="ROUND", dissolve_option="NONE", dissolve_field="", method="PLANAR")

编写的一般流程

#默认只捕捉最严重的错误try:arcpy.Buffer_analysis()except arcpy.ExecuteError:print(arcpy.GetMessages())#捕捉警告try:arcpy.SetSeverityLevel(1)arcpy.Buffer_analysis()except arcpy.ExecuteError:print(arcpy.GetMessages())

环境(Environment)设置

arcpy.env.workspace = “c:/data“#设置工作空间arcpy.env.extent = arcpy.Extent(0,0,100,100)#设置工作范围arcpy.env.overwriteOutput = True#覆盖输出

空间数据的描述

desc = arcpy.Describe(r"F:\map\region.shp")#读取文件描述print (desc.DataType)print (desc.ShapeType)print (desc.ShapeFieldName)print (desc.spatialReference.name)

判断文件是否存在

# Set the current workspacearcpy.env.workspace = r"E:\map"# Check for existence of data before deletingif arcpy.Exists("roadbuffer"): arcpy.Delete_management("roadbuffer")

显式指定文件夹中的所有要素文件

env.workspace = "F:/map"fcs = arcpy.ListFeatureClasses("*","polygon")#寻找所有面矢量文件for fc in fcs: print fc.encode("utf-8")#含中文输出UTF-8

显示矢量文件中所有字符串类型的字段名

fds = arcpy.ListFields ('F:\\map\\region.shp', "s*","")#以列表形式获取shp文件中以s开头的字段名for fd in fds:#for循环输出字段名 print fd.name