Feedback on projections/CRS section

[ioalexei]

We spent a long time on this and I'm still not sure we communicated it well to learners. Feedback from various facilitators:

• The projections sections is always going to be difficult so I think we should make it as practical as possible - e.g. show what happens if you add things with the wrong projection, mention effects on geoprocessing units, and give advice on how to troubleshoot

• Visual comparison of a few global CRS options might be helpful - e.g. Mercator vs Robinson vs Equal Earth (to illustrate the tradeoffs)

• Projection seems to be a noticeable issue. I think we should cover a bit in one of the module about projection in GIS? And add some remark about this in the "start teaching" part to inform future facilitators about this possible issue?

[isikl]

Module 2 link: https://giscience.github.io/gis-training-resource-center/content/Modul_2/en_qgis_geodata_concept.html?highlight=projections#projections

[enauj]

Expanded the part on projections. (6849ba2)
Can I get some Feedback on it?

I'm also thinking about adding a small practical exercise where participants load a world map with tissot circles and switch between a few global CRS and describe the distorion. Best would be to have a graphical representation on how that projection is made (cylindrical with standard parallels, conic, azimuthal, etc.). And then look at smaller regions and how different they look in local and global CRSs.

This could be combined with the first exercise where trainees learn to load vector data into QGIS.