@h_classen, I really love your approach. And I’m really interested in @JimScott approach too.
The only thing with persistant symbol is that apparently, map width can only be 100%, no less, with a white border, for example.
This map is used as a base to add overlay maps on it. For the computer size of the map, I can easily change these overlays’ opacity using a slider range but this component gets too small for fingers on a telephone screen. So, I’m planning to implement 'opacity buttons" for layers, i.e. buttons that change opacity continually (from 0 to 100 and then from 100 to 0, and back) when pressed. The user stops pressing when desired opacity is reached.
One of the overlay layer displays a .wms online database (cadastre, or land survey, or property map) showing land property. I’ll need a research form requesting the number of a piece of land to search the distant database and show this piece of land on the map.
This is a long term side project I’ve been working on to help the population of a small french island that has a lot of problem dealing with the scattering of land property.
LeafletLayouts_pSymbol_test2.hype.zip (62.8 KB)
I’ll keep you posted. If ideas come straight to your mind, I’ll be glad to hear them too 