Suggestion for a new ME map overlay

[chromium]

Hi to all,

 

as far I understand in the ME map view some information like structures, forest, road, rivers etc are hidden at certain scales and visibile at other scales.

 

I would like first to modify those scale limits, for example to make small town city area and roads visibile from higher scales, like 1:500.000;

 

Then, I would like to add another "overlay" (if it's the proper term) for scales equal or lower than 1:100.000, that will be placed just over the basemap and provide an higher resolution altimetric rapresentation of the terrain features.

 

The first question is: I understand correctly what is going on in the ME map? are there some kind of overlay that are shown or not depending on map scale?

 

The second question is: are those scale boundaries editable by lua, maybe by a config file or similar?

 

The third question is: Is it possibile to add another "overlay"?

 

Thanks in advance :)