layers-raster.md
In mongolmaps: Maps and Administrative Boundaries of Mongolia and Ulaanbaatar

90 m elevation needs a small area

Code
  mn_elevation("90m")
Condition
  Error in `mn_elevation()`:
  ! 90 m elevation is read for one area at a time: give `within`.
  i For the whole country, use `resolution = "1km"`.

Code
  .mm_check_tiles(40, 16, "90 m elevation")
Condition
  Error:
  ! The area is too large for 90 m elevation (40 tiles; the limit is 16).
  i Choose a smaller `within` or use `resolution = "1km"`.

Code
  mn_landcover("10m", within = "Khovd")
Condition
  Error in `mn_landcover()`:
  ! The area is too large for 10 m land cover (76061 km2; the limit is 6000 km2).
  i Choose a soum or district for `within`, or use `resolution = "1km"`.

remote reads stop cleanly when offline

Code
  .mm_remote_mosaic("https://example.org/a.tif", NULL, "elevation")
Condition
  Error:
  ! Can't read elevation data: no internet connection or offline mode is on.

mn_population() checks the year and downloads the right file

Code
  mn_population(2014)
Condition
  Error in `mn_population()`:
  ! `year` must be a single year from 2015 to 2030.

mn_zonal() summarises a raster over polygons

Code
  mn_zonal("r")
Condition
  Error in `mn_zonal()`:
  ! `r` must be a <SpatRaster>, not a string.

Code
  mn_zonal(r, data.frame(a = 1))
Condition
  Error in `mn_zonal()`:
  ! `x` must be an <sf> object, not a data frame.

mn_protected_areas() downloads, caches and clips

Code
  x <- mn_protected_areas()
Message
  i The WDPA is for non-commercial use with attribution and may not be redistributed; see `?mongolmaps::mn_protected_areas()`.
  This message is displayed once per session.