gsw_transitions function

Calculate Global Surface Water (GSW) Transitions

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()

Returns

A function that returns an indicator tibble with transition classes as variable and corresponding areas (in ha) as value.

Details

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

Examples

## 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)