While sf/rgdal/rgeos etc. try to accommodate post-EOL versions of PROJ,
GDAL and GEOS, it is not correct to assume that full functionality is
available without (close to) current versions of these libraries and their
metadata files. In a recent thread, it was sugggested that users can rely
on full functionality when using very old versions of external software;
this is not correct and has never been offered.
In particular, it is now very important to migrate all users of static
builds to GDAL >= 3, PROJ >= 6. Current versions are GDAL 3.1.0 and PROJ
7.0.1. This is because of major breaking changes in coordinate reference
system representation, from Proj4 strings to WKT2_2019 strings. See
https://www.r-spatial.org/r/2020/03/17/wkt.html and
https://rgdal.r-forge.r-project.org/articles/CRS_projections_transformations.html
I know this hurts, but Proj4 strings are unsustainable going forward, and
developers of R spatial packages are not willing to keep things running
using a defunct representation. We have been pointing this out for at
least a year, so affected users and package maintainers should know
already.
Roger
--
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; 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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