note to self: spatial random sample workaround fails occasionaly, - change to sp version?

I think we should have two options:

• One option that quickly pulls in a base map from some server (Bonus points: if that can also be downloaded beforehand: e.g. download in HQ and render maps in the field)
• Another option that shows how to do a map from a shap file / geojson (ideally as it would come from an MSF GIS person)

so in the current template there is the option to download in advance and save/send as a .rda, from hq to field for example.
Shapefile also in there, but not geojson (though i wouldve thought geojson more rare...)

Ok nice. Yeah whatever is more common. Maybe it is just my bubble where nobody uses shapefiles ;)

Possible work around

https://cran.r-project.org/web/packages/ggspatial/vignettes/ggspatial.html

chris - see zhian's point about rjava and dependencies - we definitely need a better solution for basemaps.
Thinking more and more that a simple wrapper with osmdata to pull land water and roads may just do enough (with option for pulling buildings in smaller areas.

The rosm package may be a solution, but don't count on it being updated anymore, only maintained: https://github.com/paleolimbot/rosm#readme

Just realized that ggspatial imports functions from rosm.

I think it may be possible to pre-download tiles for a given region with their API, and store it in a folder, then use file:/// construct to pass the folder's path as a URL to ggspatial/rosm

yep, rosm only available for baseplot though. ggspatial same functionality but makes available for ggplot.
Its possible to predownload and save as a .rda - the other additional benefit of ggspatial is that it makes tiles from humanitarian osm as well as black/white osm.
So the solution is to use ggspatial for tiles and SF for shapefiles etc.... all of these can be passed to ggplot.

After I polish the template a bit, I'll work on trying to get a reasonable workflow for getting the tiles.

pretty sure chris is on it

Then I will hold off

Have been looking at this today. As far as I can tell ggspatial only downloads the tiles when you add a spatial geom after annotation_map_tile, it doesn't appear to allow you to just specify that you want to download the tiles.

If you add a cache directory then it will create the folder and store the tiles there. These tiles can be used offline. It's works but the tiles don't look great with the ggplot maps. I'll see if can improve them but speaking to Alex perhaps we can look at the internals of annotation_map_tile and change it so we can just download the tiles we want without having to create a map each time.

There might be an easier work around in here than in our current setup.... Will look in to eventually
https://github.com/hypertidy/ceramic/blob/master/README.md

I associate tiles with raster files -- will downloading tiles allow for admin-2 or admin-3 level divisions? or is this just to provide a base map? Ceramic uses NE to define the tile extent, but then we'd also need to load NE.

Also, a word of caution that health districts in many countries are different from admin levels...in both Chad and DRC, this was the case.

I believe the last commit where the outbreak report existed was here:
322623e

Here we go: https://github.com/R4EPI/sitrep/blob/322623ed146342ed368dfab6cac406f592e0448e/inst/rmarkdown/templates/outbreak/skeleton/skeleton.Rmd

Note to self: see latest carto release and slippymap package to improve image res https://t.co/6OvNpqLoSC?amp=1

alternatively use {maptiles} (which uses {terra}) and then plot with tidyterra::geom_spatraster_rgb - or potentially with terrainr::geom_spatial_rgb