topic Re: Convert raster to txt in XYZ format in Python Questions

Convert raster to txt in XYZ format

GualbertoHernandez — Thu, 08 Aug 2013 20:29:42 GMT

Hello friends,

I need to convert a raster to a txt file but XYZ format.
*
ASCII TO RASTER tool does not help because it does in another format.

Know if there are processes supported by python can do?

Thank you very much for your help.

Gualberto

Re: Convert raster to txt in XYZ format

StacyRendall1 — Sat, 11 Dec 2021 10:27:32 GMT

You can determine the x,y,z dimensions using Raster, as described here.

You can iterate over the dimensions and get the cell values, as described here.

You can write to a file like this:

f = 'D:\\temp\\test.txt'
with open(f, 'w') as fObj:
  fObj.write('x, y, z\n')
  for i in range(10):
    fObj.write('%f, %f, %f\n % (i, i, i))

So, your overall code might be something like (have not tested):

outTxt = 'D:\\temp\\test.txt'
inRasFP = 'D:\\temp\\raster.img'
inRas = arcpy.Raster(inRasFP)
extent = inRas.extent
with open(outTxt, 'w') as fObj:
  fObj.write('x, y, z\n') # only if you want a header in the text file
  for x in range(extent.XMin, extent.XMax):
    for y in range(extent.YMin, extent.YMax):
      fObj.write('%i, %i, %f\n % (x, y, arcpy.GetCellValue_management(inRasFP, "%i %i" % (x, y))))

Re: Convert raster to txt in XYZ format

Luke_Pinner — Fri, 09 Aug 2013 01:20:32 GMT

Use the Sample tool. See also this answer.