Downloads a land layer matching the grid of download_wind_data() data for the same source
and bounding box, e.g. for weighting a wind rose to reduce conductance over water.
Usage
download_land_mask(source = c("era5", "cfsr", "cfsv2"), xlim, ylim)Arguments
- source
Data set:
"era5"or"cfsr". (Not yet available for"cfsv2".)- xlim, ylim
Bounding box; see
download_wind_data().
Value
A single-layer SpatRaster named "land". For ERA5 this is the land fraction of each
cell, from 0 (all water) to 1 (all land); use e.g. land >= 0.5 for a binary layer. For CFSR
it is binary, 1 for land and 0 for water. (CFSR publishes no land mask, so it is derived from
which cells have soil temperature data.)