Update content/tutorials/map_algebra/basic_map_algebra.qmd

Co-authored-by: Veronica Andreo <[email protected]>

Author: baharmon

content/tutorials/map_algebra/basic_map_algebra.qmd

@@ -149,7 +149,7 @@ Map algebra operators, functions, and variables in this tutorial
 :::
 
 # Setup
-Start a GRASS session in a new project with a Cartesian coordinate system.
+Start a GRASS session in a new project with a Cartesian (XY) coordinate system.
 Use [g.region](https://grass.osgeo.org/grass-stable/manuals/g.region.html)
 to set the extent and resolution of the computational region.
 Since we are working in a Cartesian coordinate system,