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Grade penalty example data

Source: R/dem_example.R
dem_example.Rd

A list containing two rasters covering an area near Revelstoke, British Columbia, Canada. ex_elev is elevation data and ex_wat is the proportion of the cell that contains water. Both are subsets of data downloaded with the geodata package at 30 arc seconds resolution.SpatRaster files created with the terra package must be saved with terra::wrap() and need to be unwrapped before they are used. prepExData() does this.

Usage

data(dem_example)

Format

A named list with components:

  • ex_elev: a PackedSpatRaster of elevation.

  • ex_wat: a PackedSpatRaster of proportion water.

Details

Elevation data are primarily from Shuttle Radar Topography Mission (SRTM), specifically the hole-filled CGIAR-SRTM (90 m resolution) from https://srtm.csi.cgiar.org/.

Water data are derived from the ESA WorldCover data set at 0.3-seconds resolution. (License CC BY 4.0). See https://esa-worldcover.org/en for more information.

References

Zanaga, D., Van De Kerchove, R., De Keersmaecker, W., Souverijns, N., Brockmann, C., Quast, R., Wevers, J., Grosu, A., Paccini, A., Vergnaud, S., Cartus, O., Santoro, M., Fritz, S., Georgieva, I., Lesiv, M., Carter, S., Herold, M., Li, Linlin, Tsendbazar, N.E., Ramoino, F., Arino, O., 2021. ESA WorldCover 10 m 2020 v100. doi:10.5281/zenodo.5571936.

Examples

dem_example
#> $ex_elev
#> [1] "This is a PackedSpatRaster object. Use 'terra::unwrap()' to unpack it"
#> 
#> $ex_wat
#> [1] "This is a PackedSpatRaster object. Use 'terra::unwrap()' to unpack it"
#> 
prepExData(dem_example)
#> $ex_elev
#> class       : SpatRaster 
#> dimensions  : 173, 305, 1  (nrow, ncol, nlyr)
#> resolution  : 0.008333333, 0.008333333  (x, y)
#> extent      : -118.4917, -115.95, 49.40833, 50.85  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326) 
#> source(s)   : memory
#> name        : CAN_elv_msk 
#> min value   :         349 
#> max value   :        3371 
#> 
#> $ex_wat
#> class       : SpatRaster 
#> dimensions  : 173, 305, 1  (nrow, ncol, nlyr)
#> resolution  : 0.008333333, 0.008333333  (x, y)
#> extent      : -118.4917, -115.95, 49.40833, 50.85  (xmin, xmax, ymin, ymax)
#> coord. ref. : lon/lat WGS 84 (EPSG:4326) 
#> source(s)   : memory
#> name        : water 
#> min value   :     0 
#> max value   :     1 
#>