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I have a lesson/class assignment that teaches the use of format and export environmental raster data, but the issue is the lesson is outdated from the new QGIS version.

Lesson states:

Multiply the values in two layers together, or (as here) divide all values in a layer by 10. In QGIS, go to Raster > Raster Calculator. Now, select the layer you want to manipulate (bio_1) by double-clicking it, select the name and directory of the Output layer, and then type the expression to divide by 10 – use the buttons, not your keyboard to type / 10:

Then click OK!

The QGIS 3.0 program doesn't allow you to create a new output file (or to my knowledge).

What should I do?

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Those instructions seem perfectly valid for the Raster Calculator in QGIS 3.0.

Output file settings are in the upper-right corner of the Raster Calculator window. Enter the filepath and name for your new raster where it says "Output layer."

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| improve this answer | |
  • It won't let me type anything in, in order to click “ok” button on the raster calculator. – Hannah S Apr 27 '18 at 19:41
  • Are you running QGIS 3.0.2? – ndawson Apr 27 '18 at 20:23
  • My QGIS info: QGIS version 3.0.0-Girona, Compiled against Qt 5.9.3, Compiled against GDAL/OGR 2.2.3, SpatiaLite Version 4.4.0-RC0, QWT Version 6.1.3, QScintilla2 Version 2.10.3 – Hannah S Apr 27 '18 at 20:59
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    This might be related to this bug: issues.qgis.org/issues/18417 – csk Apr 27 '18 at 21:31
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    You might want to install QGIS 2.18, which is the latest stable version of the program. QGIS 3.0 is in early release, and the developers are still working out the bugs. – csk Apr 27 '18 at 21:34

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