（三十四）arcpy开发&gdb、shapefile创建与投影定义，字段创建

今天我们来学习这个例子是创建一个gdb、然后在该gdb目录下创建一个shapefile文件，再为这个矢量文件定义投影，相应的添加到字段。这过程中使用的函数有arcpy.CreateFileGDB_management、arcpy.CreateFeatureclass_management、arcpy.Project_management、arcpy.AddField_management。最后创建的gdb文件将会在我们指定的目录下生成。

对应的shapefile文件，在ArcGIS Desktop中如下所示。

我们来看一下实现的代码。

import arcpy, datetime, os


nGDB = r"\test2.gdb"
aPath = r"C:\Users\qin\Desktop\zxy"
arcpy.env.workspace = aPath  + nGDB
aFC = aPath + nGDB + r"\demoshp"
print "starting"

def newGdb():
   if arcpy.Exists(aPath + nGDB):
      arcpy.Delete_management(aPath + nGDB)
   arcpy.CreateFileGDB_management(aPath, nGDB)
   ws, fc_name = os.path.split(aFC)
   arcpy.CreateFeatureclass_management(ws, fc_name, "POLYGON", "#", "ENABLED", "ENABLED", arcpy.SpatialReference(4326))

def checkProjection():
    for i in arcpy.ListFeatureClasses():
        desc = arcpy.Describe(i)
        pList = desc.spatialReference.type
        rName = aPath + nGDB + "\\" + i + "_P"
        if pList == 'Geographic':
            arcpy.Project_management(i, rName, arcpy.SpatialReference(4326))
        else:
            print "xxxxx"
def newField():
    arcpy.AddField_management(aFC, "divIndex", "DOUBLE")



newGdb()
checkProjection()
newField()
print datetime.datetime.now()
print "EOF!!!\n"

                           更多内容，请微信扫二维码关注公众号，或者加入arcpy开发qq学习群：487352121

转载自：https://blog.csdn.net/u010608964/article/details/89325378