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QGIS Processing Toolbox Raster Calculator & Graphical Modeler

  Рет қаралды 6,442

Hans van der Kwast

Hans van der Kwast

Күн бұрын

This video shows how to do the spatial analysis using map algebra in a different way as showed in a previous video and webinar ( • QGISHydro Webinar 3: S... ). In this video I use the raster calculator from the QGIS Processing Toolbox and I show how to use the Graphical Model builder.
This video is part of IHE Delft OpenCourseWare. For more free GIS materials check www.gisopencourseware.org

Пікірлер: 11
@hanoostdijk9490
@hanoostdijk9490 4 жыл бұрын
As a beginner in QGIS I did not know that it is possible to 'record' the various steps. This with the possibility to save the model as a script makes it 'fully' reproducible. Thanks for 'another great video' to cite one of the other reactions.
@mohamedelgamal6333
@mohamedelgamal6333 4 жыл бұрын
Thank you Hans for that outstanding video
@chriskar4186
@chriskar4186 4 жыл бұрын
Another great video! Thank you very much!
@adriandanielpantano9533
@adriandanielpantano9533 2 жыл бұрын
My model builder always gets an error from the raster calculator....
@emildokkedaljohnsen9547
@emildokkedaljohnsen9547 Ай бұрын
When I use the raster calculator in the model designer it always shows seven layers named A, B, C, D, E, F, G. But not the actual layers like shown on your video. Why does it do this? A works in the calculations, but only if it is the only raster input in that line of algorithms. How do I get it to show the correct raster layers in the raster calculator?
@youssraazaf8222
@youssraazaf8222 2 жыл бұрын
if i wan the output data to be a map layer as well with the chosen place like in white and unsuitable in black , is there a way or should i add slope criteria ?can you please answer me thank you
@raulmartinezgarrido8312
@raulmartinezgarrido8312 10 ай бұрын
With raster calculator, if some raster input came from other process appear with 'from algorithm' expresion... On spanish version appear like ' del algoritmo'... Default Input expresion on model builder looks not ok
@zulfadli5641
@zulfadli5641 Жыл бұрын
Hai Vans, I have flowaccumuation. In arcgis, I usually use formula : log10(flowaccumulation) the result is rastercalc. After that : con(rastercalc >=2,rastercalc). How to run the formula like that in QGIS. Thanks in advance.
@HansvanderKwast
@HansvanderKwast Жыл бұрын
Check the PCRaster Tools plugin. Here's a playlist: kzbin.info/aero/PLeuKJkIxCDj2xbV45C45wz3N89FvmTuSu
@RK-kv3yo
@RK-kv3yo 4 жыл бұрын
I would like to calculate mesh size of TWI map but the tools in qgis dont work. Could you please guide me?
@HansvanderKwast
@HansvanderKwast 4 жыл бұрын
Can you explain a bit more what you would like to calculate. TWI is a raster based index. Your question relates to this video: kzbin.info/www/bejne/l3mmfXaLrMxmhZI. Mesh is another data type than raster. Please explain what you mean with mesh size.
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