On Fri, 28 Apr 2023, Michael Sumner wrote:
fwiw, a method with geodata/terra
cyp <- geodata::gadm(country = c("CYP", "XNC"), path = tempdir(), version =
"3.6")
terra::aggregate(cyp)
and as per
https://github.com/r-spatial/evolution/blob/main/pkgapi_230305_refs.csv.
see ?terra::writeVector to write it out
(rgdal is very old and you should abandon it, it will be removed from
support by the end of this year)
Thank you! Yes, sp will by default switch to using sf in place of rgdal
for creating "CRS" objects, and under sp::spTransform in June, and all
three retiring packages rgdal, rgeos, and maptools will be gone by October
2023. An sp release will appear in May with a transition guide.
It seems that terra does not have an object corresponding to sp's "CRS" or
sf's "crs". As far as I can see, one needs to create an empty
SpatVector/SpatRaster object and assign a CRS, coerce to "Spatial", and
extract its slot. If this makes sense, sp could use terra (and
raster, needed for coercion) rather than sf where workflows did not
otherwise use sf. Very grateful for input here or
https://github.com/r-spatial/evolution/issues.
Roger
(just as an aside, we can't hit the geodata vector urls directly with gdal
as we can with the rasters, as they are in an R specific format)
Cheers, Mike
On Fri, Apr 28, 2023 at 10:52 AM Ben Tupper <btup...@bigelow.org> wrote:
Hi,
You might try st_union() from the sf package
https://r-spatial.github.io/sf/articles/sf3.html#geometrical-operations
On Thu, Apr 27, 2023 at 5:37 PM Miluji Sb <miluj...@gmail.com> wrote:
Dear all,
I am using the country-level shapefile from GADM. I would like to merge
Cyprus and North Cyprus into one polygon. Is this possible? I am using
rgdal to read the shapefile, subset, and then rewrite it. Any help will
be
highly appreciated.
##
world <- readOGR("~/gadm36_levels_shp", layer = "gadm36_0")
Best regards,
Milu
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--
Roger Bivand
Emeritus Professor
Department of Economics, Norwegian School of Economics,
Postboks 3490 Ytre Sandviken, 5045 Bergen, Norway.
e-mail: roger.biv...@nhh.no
https://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en
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