Unlock a bunch of Leaflet features

[amotl]

@tobiasdirksen asked about unlocking a bunch of features the other day. The Leaflet module already covers all of these options.

• Add polygons
• Add polylines
• Add WMS tiles (Add WMS layer support #29)
• Add label only markers
• Add several layers of circle markers, polygons, polylines and WMS [1]
• Add groups and layers control
• Add legend to all layers with custom legend text

[1] This could be implemented like the plotly plugin, where the user can add several traces like

[xkilian]

I get the impression that the baidu worldmap plugin has used this implementation approach, very nice plugin. Adds polygons, polylines and markers in addition to supporting multiple metrics.

[tobiasdirksen]

@xkilian Is the Baidu plugin implemented in Grafana?

[xkilian]

It is a Grafana plugin written in english probably based off of a version of Worldmap at a certain point. Though the GPS portion seems to use a china location offset, so I am not sure if it is usable outside of china. But the utility functions implementing the various leaflet features seem pretty straightforward so it is probably not a huge undertaking to actually backport/port these features to Worldmap.