[Qgis-user] FW: Pansharpening Problem

[Richard McDonnell]

Apologies,
I forgot to include the list in my response Grant, please see below.
Kind Regards,

Richard


--
Richard McDonnell MSc GIS, FME Certified Professional
FRM Data Management

--
Oifig na nOibreacha Poibl?
Office of Public Works

Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 46 942 2409
https://gov.ie/opw

--
To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie

Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/

--
MSc GIS, FME Certified Professional

--
Oifig na nOibreacha Poibl?
Office of Public Works

Sr?id Jonathan Swift, Baile ?tha Troim, Co na M?, C15 NX36
Jonathan Swift Street, Trim, Co Meath, C15 NX36
--
M +353 87 688 5964 T +353 46 942 2409
https://https://gov.ie/opw<https://www.opw.ie>

--
Email Disclaimer: https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/<https://www.opw.ie/en/disclaimer/>
From: Richard McDonnell
Sent: 16 November 2023 10:19
To: Grant Boxer <boxerg at iinet.net.au>
Subject: RE: [Qgis-user] Pansharpening Problem

Hi Grant,
The NoDATA values, if not specified are calculated from the source rasters. For RGB imagery, this typically is either 0 or 255, unless you are using an alpha band.
You can though remove the NoDATA tag from the raster. I know of two of ways to do this.


1.       Use gdal_edit with the -unsetnodata, which will modify the existing dataset.

2.       Use gdal_translate to copy the raster but by using the -a_nodata and setting it to none, to remove the NoDATA tag

I would suggest if using the first one, that you make a backup of the raster, just in case.
I hope that helps!
Kind Regards,

Richard

From: QGIS-User <qgis-user-bounces at lists.osgeo.org<mailto:qgis-user-bounces at lists.osgeo.org>> On Behalf Of Grant Boxer via QGIS-User
Sent: 16 November 2023 01:52
To: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Subject: [Qgis-user] Pansharpening Problem

I am attempting to pansharpen a PRISMA hyperspectral RGB image and I am getting areas within the image that are clipped (no data). These appear to bands with zero values in two of the three bands. Anyone have a work around or suggest how this can be avoided. I am using the gdal pansharpen tool and latest release QGIS 3.34.
Cheers Grant
Perth WA

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20231116/8a5ed43b/attachment-0001.htm>