Geolocation arrays and GCPs

Detect whether a SpatRaster source has GDAL geolocation arrays (e.g. satellite swath / curvilinear NetCDF) and/or Ground Control Points (GCPs), and report the associated spatial reference and array paths.

When a file has no conventional geotransform but does have a GEOLOCATION metadata domain (or GCPs), rast stores that information on the source and, if the dataset itself has no CRS, applies the geolocation/GCP CRS automatically so that project can use the arrays.

Usage

# S4 method for class 'SpatRaster'
has.geoloc(x)

# S4 method for class 'SpatRaster'
geoloc(x)

Arguments

x

SpatRaster

Value

has.geoloc: logical, one value per raster data source.

geoloc: data.frame with one row per source and columns geolocation (logical), gcps (logical), srs (character), x / y (paths to the X/Y geolocation datasets when present).

See also

project, rectify, is.rotated, crs

Examples

r <- rast(nrows=10, ncols=10)
has.geoloc(r)
#> [1] FALSE
geoloc(r)
#>   geolocation  gcps srs x y
#> 1       FALSE FALSE