We should test whether it would be feasible and more optimised to transform large rasters, like whole Cairngorms, or Scotland into map tiles. Some ways to explore [tiler](https://cran.r-project.org/web/packages/tiler/vignettes/tiler-intro.html), python [GeoTile](https://github.com/osgeonepal/geotile), [this](https://gis.stackexchange.com/questions/285483/how-can-i-convert-an-image-into-map-tiles-for-leafletjs) answer on LeafletJS.
We should test whether it would be feasible and more optimised to transform large rasters, like whole Cairngorms, or Scotland into map tiles.
Some ways to explore tiler, python GeoTile, this answer on LeafletJS.