Calculate Global Surface Water (GSW) Seasonality — gsw

GSW seasonality describes the intra-annual distribution of surface water for each pixel. The raster files have integer cell values between [0, 12], indicating how many months per year the pixel was classified as water.

Usage

calc_gsw_seasonality()

Value

A function that returns an indicator tibble with seasonality categories as variables and corresponding areas (in ha) as value.

Details

The pixel values are aggregated using method provided via the stats parameter.

The required resources for this indicator are:

global_surface_water_seasonality

Examples

# \dontrun{
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_seasonality()) %>%
  calc_indicators(calc_gsw_seasonality()) %>%
  portfolio_long()

aoi
#> Simple feature collection with 13 features and 10 fields
#> Geometry type: POLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -59.84866 ymin: 8.307999 xmax: -59.71 ymax: 8.364002
#> Geodetic CRS:  WGS 84
#> # A tibble: 13 × 11
#>    WDPAID NAME    DESIG_ENG ISO3  assetid indicator datetime            variable
#>     <dbl> <chr>   <chr>     <chr>   <int> <chr>     <dttm>              <chr>   
#>  1  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  2  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  3  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  4  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  5  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  6  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  7  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  8  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#>  9  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#> 10  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#> 11  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#> 12  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#> 13  41057 Shell … Managed … GUY         1 gsw_seas… 2021-01-01 00:00:00 gsw_sea…
#> # ℹ 3 more variables: unit <chr>, value <dbl>, geom <POLYGON [°]>
# }