Consistency in README tutorial

[majdal]

Going through the tutorial in README, there's a small error that that took me a bit of investigating to figure out, so maybe it's worthwhile to correct. I'm happy to create a pull request, but first I'd like to hear from the author/community about what's the best way to correct it.

The GeoJSON that you provide in the example is in WGS84 (EPSG:4326), not in WGS 84 / Pseudo-Mercator (EPSG:3857). With the default CRS (3857), the example shows a blank box instead of the map of Arizona. Setting the CRS explicitly in the AgentCreator to 4326 fixes the issue. The image attached should be corrected to look like the following:

The image currently in the tutorial is the one below, and it's in epsg:2163. The difference might create some unnecessary confusion to a beginner.

This also means that the distance calculation (m.grid.get_neighbors_within_distance(agent, 600000)) has the wrong distance/units.

Should we move the reference to explicitly setting the CRS to be just after the model definition?

[ArcPam]

This might be why my files are defaulting to the top of the page. Do you know how to fix that issue?

[majdal]

@ArcPam I'm not sure I understand your question... More details please

[ArcPam]

I was able to fix the issue by projecting all data in 4326 and it fixed the issue.

[wang-boyu]

Introductory tutorial has changed to a step-by-step SIR model using Solara visualization in Jupyter notebook. Hence this issue no longer exists. Closing.