topic Re: Doubt in ListField() for Interpolating all Colums(Fields) through Iteration in Python Questions

Doubt in ListField() for Interpolating all Colums(Fields) through Iteration

VinayManohar — Sat, 11 Dec 2021 23:59:03 GMT

Hi, I'm Vinay.M.,

A Scholar of GIS from University of Mysore, India

I'm trying to build ArcPy Code, to Interpolate(IDW) all columns(DAY001, DAY002, and DAY003) in a feature class(Testing.shp) using ListField()

But Failed

import arcpy
import os
from arcpy import env
from arcpy.sa import *
arcpy.env.overwriteOutput = True

workspace = r"C:\Users\Admin\Desktop\Python"
env.workspace = workspace

fields = arcpy.ListFields("C:\Users\Admin\Desktop\Python\Testing.shp")

for field in fields:
     outIDW = Idw()
     outIDW.save(os.path.join(env.workspace,fields+".tif"))‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Anyone Please help me

Vinaymanohar.gis@gmail.com

File Attached

Re: Doubt in ListField() for Interpolating all Colums(Fields) through Iteration

DanPatterson_Retired — Thu, 20 Apr 2017 09:13:46 GMT

I would suggest doing the process manually through ArcToolbox's Spatial Analyst IDW once, then go to the Geoprocessing Results window and copy the code snippet. That will give you the correct format for accessing the required fields. From there, then you can cycle through your field list to perform the IDW. Besides, just getting the field is only one issue, you still have to deal with the desired processing extent, the desired cell size and a variety of other factors that go into an informed IDW interpolation

Re: Doubt in ListField() for Interpolating all Colums(Fields) through Iteration

curtvprice — Sat, 11 Dec 2021 23:59:06 GMT

Let me toss out a little helper on listing the fields. You want to use a wildcard to _only_ get your DAY fields:

arcpy.ListFields(ds, "DAY*")‍‍‍‍‍

Also you get a list of field objects, not field names, so you need to do this in your loop:

for field in fields:
  fname = field.name
  outIDW = Idw(ds, fname ...
  outIDW.save(....)‍‍‍‍‍‍‍‍‍‍‍‍