QGIS Processing Toolbox Raster Calculator & Graphical Modeler

[@hanoostdijk9490]

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.

[@adriandanielpantano9533]

My model builder always gets an error from the raster calculator....

[@emildokkedaljohnsen9547]

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?

[@mohamedelgamal6333]

Thank you Hans for that outstanding video

[@chriskar4186]

Another great video! Thank you very much!

[@youssraazaf8222]

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

[@zulfadli5641]

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]

Check the PCRaster Tools plugin. Here's a playlist: kzbin.info/aero/PLeuKJkIxCDj2xbV45C45wz3N89FvmTuSu

[@raulmartinezgarrido8312]

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

[@RK-kv3yo]

I would like to calculate mesh size of TWI map but the tools in qgis dont work. Could you please guide me?

[@HansvanderKwast]

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.