Network property is in Germany set to road even a network is available

[rene-mueller]

Network property is in Germany set to road even a network is available. The streets should always have a network so that the streets can be equipped with the national signs, as with mapbox street style.

US:
https://onthegomap.github.io/planetiler-demo/#14.14/43.67017/-92.86298

Germany:
https://onthegomap.github.io/planetiler-demo/#17.01/50.365394/11.785406

Projects like openstreetmap-americana use the route_n tags instead to render highway shields since a road may belong to multiple networks. They publish the highway shield renderer as an npm package too.

Credits to @msbarry

From my point of view, it would make sense to include this as a shield property in transportation_name.

initially posted at: openmaptiles/planetiler-openmaptiles#143