Support for geospatial visualization

[C-Loftus]

Thank you for your work on this fork.

It would be very useful if it were possible to visualize geospatial query results on a map. (i.e. checking if there are gsp:wkt results and if so, using them for the points to plot using leaflet or something analogous)

It appears there is support for this in yasgui but it was a plugin or a saas offering and thus it is not bundled in the source code. The upstream docs say Triply provides additional plugins that are only free to use via https://yasgui.triply.cc or TriplyDB. These additional plugins are not MIT licensed and cannot be used or included programmatically.

I was wondering if you think this would be reasonable to add to this repo.
I was going to look into trying to add this but I am blocked by #37

[ludovicm67]

This was something I've already done for a Trifid module: https://github.com/zazuko/trifid/blob/bc9fb61e5dafd642e726a86b36e7d63c0be5c038/packages/yasgui/plugins/map.js

Maybe I should include it upstream already, so that it could benefit everyone.

[VladimirAlexiev]

• There is also
  https://github.com/Thib-G/yasgui-geo-tg
  https://github.com/sparna-git/Sparnatural-yasgui-plugins/tree/main/src/sparnatural-yasr-map-plugin
• And in these issues I suggested merging them
  consider merging with other YasGUI-geo Thib-G/yasgui-geo-tg#3 (see here for a shallow comparison)
  map: consider merging with other YasGUI-geo sparna-git/Sparnatural-yasgui-plugins#47
• @ludovicm67 could you compare your module to the above two?
  • What do you use for background map? Both the above use leaflet
  • For WKT parsing? yasgui-geo-tg uses wellknown, but MatData suggests betterknown