Split between Auxiliary layers and Map components? #24
Description
In the tmap4 paper, we split Map components into:
- Auxiliary layers: tm_basemap, tm_tiles, tm_grid, tm_graticule
- Map components: the rest
The question is should we also do it here? Or should we just split tm_grid and tm_graticule, while explain tm_basemap and tm_tiles in the later chapters (about interactive maps)?