Extract raster data with a DGG shapefile

Source: R/dgg_extract.R

Given a stars data object and shapefile, extracts the relevant data using exactextractr::exact_extract(). Stars inputs should be in raster format with x and y dimensions. This function is planned for deprecation whenever direct support for exact_extract() is better supported via stars::aggregate().

dgg_extract(dat, dgg, var = NULL, fun, progress = FALSE)

Arguments

dat

The raster data to extract.
dgg

Shapefile containing the DGG boundaries to use for the extraction.
var

The variable to extract.
fun

The function to pass to exactextractr::exact_extract().

Value

Examples

dgg_extract(hyde_med, dgg_med, 'crops', 'sum')

#> stars object with 2 dimensions and 1 attribute
#> attribute(s):
#>        Min.   1st Qu.   Median     Mean  3rd Qu.     Max.
#> crops     0 0.2012841 3.241196 11.98653 15.58761 95.97917
#> dimension(s):
#>          from   to offset delta refsys point
#> geometry    1 7036     NA    NA WGS 84 FALSE
#> time        1    6     NA    NA     NA    NA
#>                                                                     values
#> geometry POLYGON ((29.14886 30.80048...,...,POLYGON ((38.837 39.99234, ...
#> time                                                     3000BC,...,2000AD