topic Re: Automized Rectifying with spezified pixel size in Data Management Questions

Automized Rectifying with spezified pixel size

VeronikaDöpper — Thu, 28 Oct 2021 09:08:24 GMT

I have georeferenced plenty of images which I would like to automatically rectify via a Python script. However, I face some troubles in applying a fixed pixel size to all of them.

What we did so far:

1) Setting the Links and exporting them to txt file

2) Update Georeference

3) Update Spatial Reference

4) set arcpy.env.cellSize to 0.000001 ( the data UAV imagery an in EPSG 4326)

4)apply arcpy.Warp_management(tif_path, source_pnt, target_pnt, out_raster_path, transformation_type, resampling_type) OR arcpy.WarpFromFile_management(tif_path, out_raster_path,Link_txt_file, "POLYORDER2", "BILINEAR")

The warping itself works just fine, but the defined cellSize is not implemented. Are there any hints on what I'm doing wrong or missing out?

Manually rectifying the same image and defining the pixel size works, by the way.However, this is just very unhandy when targeting several hundreds of images...

Thanks!

Re: Automized Rectifying with spezified pixel size

Anonymous User — Tue, 21 Dec 2021 00:12:53 GMT

Hello VeronikaDopper,

Could you provide a code snippet for reference?

For the manual process that works:

Idea 1:

In Geoprocessing history --> right-click --> Save as Python Script
Do this for each step and put together as one script.

Idea 2:

Have you considered using ModelBuilder to set this process up?
Run successfully
Export to Python File

Maybe these ideas will generate Python scripts that will identify the problem.

Cheers,

Mike

Re: Automized Rectifying with spezified pixel size

AxelThomas — Wed, 08 May 2024 10:52:09 GMT

Hallo Veronika,

I am having the same problem as you: I am trying to substitute the 'georeferencing' => 'rectify' tool by using a python script. So far I use WarpFromFile_management followed by Resample_management.

While this approach works in principle I would like to see alternative ways to rectify and resample an image using arcpy. Did you find a solution?

Kind regards

Axel