search

qgis / QGIS

QGIS is a free, open source, cross platform (lin/win/mac) geographical information system (GIS)
https://qgis.org
GNU General Public License v2.0
10.5k stars 2.99k forks source link

ability to create virtual band for raster layers #21126

Closed qgib closed 3 years ago

qgib commented 9 years ago

Author Name: Mathieu Pellerin - nIRV (Mathieu Pellerin - nIRV) Original Redmine Issue: 13054

Redmine category:rasters

It'd be very useful for QGIS to be able to create virtual bands for raster layers, similar to virtual columns for vector layers. A virtual raster band would use a mathematical formula (with access to a pixel values of other bands on of raster dataset) to create pixel values.

This would allow users to bypass the need to store additional rasters by dynamically computing the pixel value out of a formula. Scenarios where this would be very useful:

qgib commented 7 years ago

Author Name: Giovanni Manghi (@gioman)

qgib commented 6 years ago

Author Name: Johannes Kroeger (Johannes Kroeger)

I want to voice my support of this feature request. Just had several intermediate files from playing with the raster calculator and also had to copy and paste my expressions each time. It can be a tremendous time saver and enabler to dynamically adjust things. This would be a great feature!

alexbruy commented 3 years ago

There is an ongoing effort to implement this functionality during GSoC 2021. See #44195.

alexbruy commented 3 years ago

Probably can be closed, as #44195 was merged.

github-actions[bot] commented 3 years ago

The QGIS project highly values your report and would love to see it addressed. However, this issue has been left in feedback mode for the last 14 days and is being automatically marked as "stale". If you would like to continue with this issue, please provide any missing information or answer any open questions. If you could resolve the issue yourself meanwhile, please leave a note for future readers with the same problem and close the issue. In case you should have any uncertainty, please leave a comment and we will be happy to help you proceed with this issue. If there is no further activity on this issue, it will be closed in a week.

github-actions[bot] commented 3 years ago

While we hate to see this happen, this issue has been automatically closed because it has not had any activity in the last 42 days despite being marked as feedback. If this issue should be reconsidered, please follow the guidelines in the previous comment and reopen this issue. Or, if you have any further questions, there are also further support channels that can help you.