I'm having problems trying to use the adehabitatHR package in R. When I load the rgdal package I get the following error message.
> library(rgdal)
Loading required package: sp
rgdal: version: 1.0-7, (SVN revision 559)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 1.11.1, released 2014/09/24
Path to GDAL shared files: /usr/local/share/gdal
Loaded PROJ.4 runtime: Rel. 4.9.1, 04 March 2015, [PJ_VERSION: 491]
Path to PROJ.4 shared files: (autodetected)
WARNING: no proj_defs.dat in PROJ.4 shared files
Linking to sp version: 1.2-1
I haven't found an answer that's suitable for someone who isn't highly skilled in computer programming (such as how to upgrade proj4 for rgdal). The extant answers on this topic are not written in a form that's understandable to a layperson - for example I don't know how to "compile", "clone" etc from the GitHub codes linked in other threads. These answers presuppose (what seems to me to be) a significant amount of programming knowledge that isn't applicable to my field of study. I would appreciate if someone could explain it in a straightforward manner to someone who has basic computer knowledge.