Qgis Raster Calculator : "If Condition" Trick

[@mlfb01ag]

Very well explained, thanks! 2:00 Intro to Raster Calculator; 3:25 Setting the expression to create a layer where all the cells>500 are given value=1, and all the cells500 are left the same, and the cells

[@jakubfuska244]

try map@1/(map@1>500). It will do the same in areas >500, but in areas 500 and no 0 pixels - you dont even have to fix the transparency for 0 pixels. That is objectively better as in further calculations the 0 and NULL values are way different ;) anyway, nice video!

[@MiningGeologist]

Great Tip thank you Jakub

[@jakubfuska244]

@@MiningGeologist noprob :)

[@johnariestabora4955]

whats the IF command to fill null gaps in raster with another raster?

[@MiningGeologist]

That would require a little bit of scripting

[@mlfb01ag]

After changing the value of the unwanted cells into "0" as suggested here, maybe you need to get rid of them, that is, to change their 0 value into NoData value. If so, you can use the trick suggested by Hans van der Kwast in his video "Dealing with NoData in Discrete Rasters using QGIS" (kzbin.info/www/bejne/p3LTn56nbNamfLc)