Introduction
An inset map or minimap is a small map embedded in the main map. The
purpose of such a small map is 1) to show geographic context (zoomed
out) or 2) to show details (zoomed in). The first type is called a
minimap, created via tm_minimap. The second type can be
created with the general purpose function tm_inset().
So
- we use
tm_minimap(()to show a broader geographic context; where on earth is the main map located? - we use
tm_inset()to zoom in on areas that are too cluttered at the main maps’s scale.
Note that both tm_inset() and tm_minimap()
are map components (see vignette)
Minimaps
tmap_mode("plot")
#> ℹ tmap modes "plot" - "view"
#> ℹ toggle with `tmap::ttm()`
tm_shape(NLD_muni) +
tm_polygons(
fill = "edu_appl_sci") +
tm_title("Population share with (applied) university degree in 2022") +
tm_credits("Statistics Netherlands (CBS)") +
tm_minimap(position = c("left", "top"))
#> [tip] Consider a suitable map projection, e.g. by adding `+ tm_crs("auto")`.
#> Linking to GEOS 3.12.1, GDAL 3.8.4, PROJ 9.4.0; sf_use_s2() is FALSE
#>
#> This message is displayed once per session.
The implementation in plot mode is experimental (and new as of tmap 4.2). It features a small globe. There are no options implemented yet to change the appearance. Note that it takes a few seconds to run due to the applied orthographic map projection.
The minimap is interactive in view mode.