An example of working with graphical modeler in QGIS: MCDM model

[@pyzis]

3:12 *convert the DEM into slope
16:45 *rasterised

[@sadiqalmalki1589]

Thank you for your video I have a question, I would to classify wetlands according to water index and NDVI index, how can I make a condition for raster e,g if water index >1 this cell is water, and if water index < 1 and NDVI > 0.5 is high vegetation, another condition e.g if water index

[@pyzis]

Sadiq Almalki In gis, you can use conditional statements in raster calculator. However, the syntax of these kind of statements in arcgis and qgis are different. In arcgis, there's a statement called 'con' and others and in qgis, it's very simple.
In qgis, your problem can be simplified as:
("water index">1)*1 +(("water index"

[@opengisog]

Hello, congratulations for the video. What's ur QGIS version?

[@pyzis]

3.4 Madeira