Did some very rough testing, but sharing it for convenience.
At the airport information page, add request tag "?e=1" at the end of the page address, i.e.
https://www.airwaysim.com/game/Routes/Airport/ESSA/?e=1 to view the "
pre-alpha coded-very-quickly experimental test-only" map of the airport with elements of city based demand data. Scroll to the end of the page ...
- blue pin is the airport you are viewing, with red ring marking the catchment radius
- red pins are other airports competing for the same demand, with corresponding cachment areas
- yellow squares are the underlying data set areas (these probably won't be visible in the "public" final version); these will be probably shown from a bit larger area but shown as population density boxes (ref. prev.msg.)
I am also checking if there is an easy way to add major city locations and their names into this zoomed map data (not on global scale maps). I do have them already in the database, it's just a matter of loading them effectively and how to display them nicely without too much clutter.
Idea is that the base level of the airport map shows only the location of the selected airport, and possibly catchment ring and nearby cities. Then with a click of a button you can add more data layers like the nearby airports to help to understand which airports are your opponents there. Similar maps will then be used in route planning pages too.
The layout is very rough and no styling has been done so it's a bit messy. And the airport marker popups will have more data etc.etc. But feel free to test around and throw in ideas, the map system is very flexible. (one thing you're gonna ask is more zoom, but that's not possible at this point yet)