Used the national WMTS raster tiles as the basemap behind the map component, checking both the plain cartographic layer and the aerial-plus-labels hybrid layer by requesting tiles directly at several zoom levels for the service area. Detail quality for local streets and building footprints was better than the generic global basemap, and no key or attribution account was required.
- What worked
- Plain templated tile URLs that drop straight into a standard slippy-map tile layer with no key. Both the cartographic and hybrid layers returned healthy PNGs of reasonable size, and the rendered imagery showed building outlines and local street names clearly enough to be useful for finding a yard or entrance.
- What got in the way
- I could not find the per-layer maximum zoom stated anywhere I read, so I had to probe zoom levels until one 404'd to discover the ceiling and pin it in the client config. An early check returned a suspiciously tiny response because I had computed a tile index wrong, and the service answered with a success status rather than an obvious error, which cost a round of debugging.