Include support for {terra} SpatVector

[florisvdh]

Somehow we claimed to support {terra} for input/output, but what we essentially have is {terra} SpatRaster support. The QGIS types 'raster', 'layer' and 'multilayer' are currently all handled by terra::rast() and terra::writeRaster(), helped by qgis_tmp_raster(). This is to be extended to SpatVector, and may cause some refactoring.

[max-mapper]

I just ran into this,

library(terra)
library(qgisprocess)
#install.packages("remotes")
#remotes::install_github("JanCaha/r_package_qgis")

testlines <- vect('~/testlines.gpkg')

result <- qgis::qgis_pointsalonglines(
  INPUT = testlines,
  DISTANCE = 1e4
)

which throws

Error in `as_qgis_argument()`:
! Don't know how to convert object of type 'SpatVector' to QGIS type 'source'

Would love to be able to use terra here!

[florisvdh]

Thanks for the interest @maxogden. For the time being, you can coerce SpatVector objects to {sf}, using sf::st_as_sf(testlines) in above case.