Provides the Open Source Geometry Engine ('GEOS') as a
C API that can be used to write high-performance C and C++
geometry operations using R as an interface. Headers are provided
to make linking to and using these functions from C++ code as
easy and as safe as possible.

Provides the Open Source Geometry Engine ('GEOS') as a
C API that can be used to write high-performance C and C++
geometry operations using R as an interface. Headers are provided
to make linking to and using these functions from C++ code as
easy and as safe as possible. If a suitable version of 'GEOS'
is not available, an internal version of 'GEOS' will be
built and used.

Generic Coordinate Transformation Library ('PROJ') C API
c(
person(given = "Dewey",
family = "Dunnington",
role = c("aut", "cre"),
email = "dewey@fishandwhistle.net",
comment = c(ORCID = "0000-0002-9415-4582")),
person("PROJ authors", role = "aut"),
person("Jeroen", "Ooms", role = "cph", comment = "configure script"),
person("Evan", "Roualt", role = "cph"),
person("Thomas", "Knudsen", role = "cph"),
person("SDFE", role = "cph"),
person("Kristan", "Evers", role = "cph"),
person("Frank", "Warmerdam", role = "cph"),
person("Charles", "Karney", role = "cph"),
person("Evan", "Roualt", role = "cph")
)
Provides a 'PROJ' <https://proj.org> C API that can be
used to write high-performance C and C++ coordinate transformation
operations using R as an interface. This package contains an internal
version of the 'PROJ' library to guarantee the best possible
consistency on multiple platforms, and to provide a means by which
'PROJ' can be used on platforms where it may be impractical
or impossible to install a binary version of the library.
Dewey Dunnington [aut, cre] (<https://orcid.org/0000-0002-9415-4582>),
PROJ authors [aut],
Jeroen Ooms [cph] (configure script),
Evan Roualt [cph],
Thomas Knudsen [cph],
SDFE [cph],
Kristan Evers [cph],
Frank Warmerdam [cph],
Charles Karney [cph],
Evan Roualt [cph]

libcurl (optional), libtiff + libjpeg + zlib
(optional)