Add example of integration with Quick Map Services about xyzservices

[giswqs]

Leafmap now has an interactive GUI for searching and loading basemaps from xyzservices and QMS. See opengeos/leafmap#93

[martinfleis]

@drnextgis this is great!

I would even be keen to turn it into a built-in method, something like TileProvider.from_qms(name). Would you like to add that? (if not, no problem, I can have a look at that at some point)?

[jorisvandenbossche]

Cool!
They have a {switch:a,b,c,d} syntax for {s} (see eg https://qms.nextgis.com/geoservices/567/), which is probably something we need to add support for.

[martinfleis]

Good catch. I guess we should replace {switch:a,b,c,d} with {s} and store "abcd" in our "subdomains"under the hood infrom_qms`. Then we don't have to add specific support for this syntax elsewhere.

[giswqs]

Here is an interactive streamlit app for searching and loading basemaps xyzservices and QMS.

https://share.streamlit.io/giswqs/streamlit-geospatial/app.py?page=Search+Basemaps