Timeline for Working with NaN/null and different extents in QGIS Raster calculator?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
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| Apr 10, 2020 at 9:36 | comment | added | Marco | My scripting tools are too limited, otherwise I would ask for your python code. GRASS is very powerful for raster manipulation, but it is not friendly at all. QGIS does it quite well at making easier to work with tools from GRASS. I think it is still a problem, I have an almost duplicated question about no-data values gis.stackexchange.com/questions/357723/… | |
| Apr 9, 2020 at 13:13 | comment | added | Miro | @Marco nice revival. I do wonder if this is still problem in QGIS 3.14 as I don't process rasters in QGIS anymore. At that time I ended up writing python script. Also temporarily was using model builder, to change null values to normal values and back. And resizing, copying rasters, burning values from rasters converted to xyz points and other fun stuff as workarounds. | |
| Apr 9, 2020 at 12:32 | comment | added | Marco | I have just perform it with r.patch from the Processing Toolbox. Not an obviuos way to control the right parameters, but I will post a solution once I master it | |
| Apr 13, 2018 at 13:03 | answer | added | Kazuhito | timeline score: 2 | |
| May 30, 2017 at 1:09 | comment | added | Miro | StevenKay and Kazuhito thank you for your tips, will give it a try | |
| May 29, 2017 at 12:01 | comment | added | Kazuhito |
As to your second question, to replace nodata cells by the values in small extent raster, SAGA Patching tool (in Processing Toolbox | SAGA | Raster Tools) is powerful and reliable.
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| May 27, 2017 at 5:29 | history | tweeted | twitter.com/StackGIS/status/868338338767323136 | ||
| May 26, 2017 at 22:37 | comment | added | Steven Kay | i think SAGA allows this using 0/0 to represent NaN, e.g. this answer | |
| May 26, 2017 at 10:54 | history | edited | PolyGeo♦ | CC BY-SA 3.0 |
edited title; edited tags
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| May 26, 2017 at 7:40 | history | asked | Miro | CC BY-SA 3.0 |