WoW. This is really awesome!
Whish this existed many years ago... I was using GIMP and all that magic
tools but without resampling or altering the size of the image, and
carefully re-applying geo-tags with the use of listgeo and geotifcp
(like mentioned in https://marc.info/?l=grass-user&m=121788119621237)
:-).
On 2022-01-13 23:19, [email protected] wrote:
_I discovered that starting with v2.10.24 Gimp knows about and keeps geotiff tags intact.[0] This means we can use tools like Magic Wand fuzzy select and a host of other tools to quickly fix a host of image issues that are difficult to address using command line tools and/or code. _
It gets better: Gimp reads *.msk files without any fuss. This means drastically reduced memory requirements for quickly making simple edits only to the mask layer. So a person can:
- take a large multiband band geotiff with a mask side car file, squash the 3+ bands into 1 band
- open the original .msk file in Gimp
- drag and drop the squashed 1 band file on top the Gimp session
o selecting import tif as a Layer
- Lock the imported layer, set to 50% transparent (or whatever). This is the Visual Guide layer.
- Paint as thou wilt on the base mask layer (Black is Nodata, White is Data)
- Delete the visual guide layer
- Export the base mask layer
o Select tiff File Type
§ use Deflate compression
§ keep metadata (Geotiff will be disabled, that's okay)
§ use "input-rgb-geotiff.tif.msk" as file name
- DONE!
_(this is so awesome. :)_
-Matt
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