[Rspatial-devel] CRS("+proj=longlat +datum=wgs84")

[Roger Bivand]

On Mon, 9 Mar 2015, Edzer Pebesma wrote:

> up to now, CRS("+proj=longlat +datum=wgs84") would be accepted when sp
> is loaded, but rgdal is not. I modified this into quietly checking
> whether rgdal is available:
>
> rgdal::checkCRSArgs used to be checked only when
>
>   if (!is.na(uprojargs) && "rgdal" %in% .packages()) {
>
> I changed this into:
>
>    if (!is.na(uprojargs) && requireNamespace("rgdal", quietly = TRUE)) {
>
> which leads to the following behaviour with only sp loaded:
>
>> CRS("+proj=longlat +datum=wgs84")
> Error in CRS("+proj=longlat +datum=wgs84") :
>  unknown elliptical parameter name
>
> I think this is good, although it currently breaks packages HSAUR3 and
> MapGAM. Shall I contact its authors?

Yes, but note that I'm making changes in rgdal to accommodate forthcoming 
PROJ 4.9.1. However, lower case wgs84 has never been OK, right?

Roger

>

-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no