[Qgis-user] Raster Calculator Error Questions

[Wanda Norman]

Greetings friends:



I am working on lesson 7.3.5 in the User Guide / Manual (QGIS 3.10) –
Following along: Using the Raster Calculator.



I am having difficulty with the calculation formula as indicated below:



The manual states this formula should be used:

               Aspect at 1 <=90 OR Aspect at 1 >= 270

Which I am assuming is incorrect because a) I get an error when I run it;
and b) when I set the parameters using the expression operators the formula
looks like this:

               “Aspect at 1” <=90 OR “Aspect at 1” >=270

However, I still get the error:

Error parsing formula

Execution failed after 0.02 seconds



With some help – I then tried this formula

\“Aspect at 1”\ <=90 OR \“Aspect at 1”\ >=270

Which worked for this assignment.



However, moving on to lesson 7.3.6 – More criteria: which takes me to
21.12.2. Calculate slope (less than 2 and 5 degrees)

I get the same error as above again.



I am steadily working my way through the Manual and would appreciate any
help.  I am using QGIS version 3.10.9-A Coruna (64 bit) on a Windows PC.



Thank you!

Wanda Norman
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