Timeline for Downsampling then upsampling raster using QGIS?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| May 10, 2022 at 10:00 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Apr 6, 2022 at 1:26 | answer | added | Buff Fox | timeline score: 1 | |
| Dec 8, 2017 at 1:25 | history | edited | PolyGeo♦ | CC BY-SA 3.0 |
deleted 10 characters in body; edited title
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| May 19, 2015 at 9:45 | comment | added | Richard Todd | Block statistic is exactly what i want to do... | |
| May 19, 2015 at 9:44 | comment | added | Richard Todd | gdal_translate seems to have the same issue as gdalwarp. | |
| May 19, 2015 at 9:44 | comment | added | Richard Todd | Still not found an answer to this. It seems ot be because QGIS preserves the original high resolution data in the downsampled file. Therefore when upsampling we just go back to the original. | |
| May 9, 2015 at 0:11 | comment | added | Chris W | Sounds like you're looking for the QGIS equivalent of ArcGIS' Block Statistics. | |
| May 8, 2015 at 12:40 | comment | added | Kersten | If you use the nearest neighbour resampling method this should indeed work - and on my machine it does. Did you make sure to not accidentaly select the original raster as input in the dropdown menu when upscaling? Could you provide a small sample dataset so we can reproduce this error? | |
| May 8, 2015 at 11:24 | comment | added | user30184 | Why not? gdalwarp should work just as fine, or gdal_translate with -tr parameter. | |
| May 8, 2015 at 10:28 | comment | added | RolandG | Why use gdalwarp? Use for example the SAGA/Grid-Tools: resampling. This works fine. | |
| May 8, 2015 at 9:19 | comment | added | user30184 | If you save the downsampled result into a new file with a new name and upsample that it would be a miracle if QGIS can find new details to the image. | |
| May 8, 2015 at 9:15 | history | asked | Richard Todd | CC BY-SA 3.0 |