Viewing maps

[micha-silver]

Currently we use two different packages for displaying maps: leaflet and tmap. The leaflet package is used in 7 functions, and tmap in only two. In an effort to reduce package dependencies, we should focus on only one of these.

Last year I added tmap since I needed to display raster images (i.e. in the get_site_ODS() function), and leaflet is a bit troublesome and tricky with raster data. However now there is a new function in terra (which we need installed anyway) called plet (yes, that's the spelling 😃 ) which displays a terra::SpatRaster with leaflet. This function requires leaflet >= 2.1.1. That minimum version is already specified in the DESCRIPTION file.

So I suggest to change the functions that currently use tmap over to leaflet. And remove the dependency on tmap.

[micha-silver]

One problem: the minimum requirement to use leaflet with the plet() function is greater than 2.1.1. i.e. leaflet > 2.1.1. That means installing from github, not CRAN. Can we do that?