gsw_transitions | R Documentation |
GSW transition data contains information about the type of surface water
change for each pixel. The raster files have integer cell values between
[0, 10]
that code for different transition classes:
calc_gsw_transitions()
Value | Transition Class |
1 | Permanent |
2 | New Permanent |
3 | Lost Permanent |
4 | Seasonal |
5 | New Seasonal |
6 | Lost Seasonal |
7 | Seasonal to Permanent |
8 | Permanent to Seasonal |
9 | Ephemeral Permanent |
10 | Ephemeral Seasonal |
To aggregate, we sum up the area of each transition class for a given region.
The required resources for this indicator are:
global_surface_water_transitions
A function that returns an indicator tibble with transition classes as variable and corresponding areas (in ha) as value.
## Not run:
library(sf)
library(mapme.biodiversity)
outdir <- file.path(tempdir(), "mapme-data")
dir.create(outdir, showWarnings = FALSE)
mapme_options(
outdir = outdir,
verbose = FALSE
)
aoi <- system.file("extdata", "shell_beach_protected_area_41057_B.gpkg",
package = "mapme.biodiversity"
) %>%
read_sf() %>%
get_resources(get_global_surface_water_transitions()) %>%
calc_indicators(calc_gsw_transitions()) %>%
portfolio_long()
aoi
## End(Not run)
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