[Rspatial-devel] spTransform

[Edzer Pebesma]

On 04/19/2013 04:58 PM, Roger Bivand wrote:
> OK, but I can't release rgdal yet - there is an AddressSanitizer issue
> which means I have to install GCC 4.8 to check, clang wasn't able to.
> I'll say when I'm ready - rgdal will have to depend on the new sp, so
> that can go first, but should be checked to see what happens if old
> rgdal is installed with it.
> 

No, the dependency is reversed: rgdal has to go first, and then sp will
have to SUGGEST: the new rgdal 0.8-7; I updated the respective
DESCRIPTIONS. I went through checking all packages depending on modified sp.

I would be surprised if cran would halt releasing rgdal, for the reason
that you haven't managed to install a compiler that's only been out
there for three weeks (r-devel)... sounds pretty insane.

> Roger
> 
> On Fri, 19 Apr 2013, Edzer Pebesma wrote:
> 
>> spTransform is currently defined, both as S4 and S3 methods, in rgdal. I
>> try to export it in spacetime (for ST objects), but this doesn't work
>> because rgdal is not imported (I'd like to avoid dependence on rgdal).
>>
>> My suggestion is to:
>>
>> add the definition of the S4 generic to sp, and have sp export it, but
>> not provide methods for it.
>>
>> This works, but will lead to all kind of warnings when loading rgdal,
>> caused by the S3 methods. So my second suggestion is:
>>
>> remove all S3 definitions & exports of spTransform from rgdal. After
>> that, all three work happily together:
>>
>>> library(rgdal)
>> Loading required package: sp
>> rgdal: version: 0.8-6, (SVN revision 453M)
>> Geospatial Data Abstraction Library extensions to R successfully loaded
>> Loaded GDAL runtime: GDAL 1.9.2, released 2012/10/08
>> Path to GDAL shared files: /usr/share/gdal/1.9
>> Loaded PROJ.4 runtime: Rel. 4.8.0, 6 March 2012, [PJ_VERSION: 480]
>> Path to PROJ.4 shared files: (autodetected)
>>> library(spacetime)
>>> showMethods(spTransform)
>> Function: spTransform (package sp)
>> x="SpatialGridDataFrame", CRSobj="CRS"
>> x="SpatialLines", CRSobj="CRS"
>> x="SpatialLinesDataFrame", CRSobj="CRS"
>> x="SpatialPixelsDataFrame", CRSobj="CRS"
>> x="SpatialPoints", CRSobj="CRS"
>> x="SpatialPointsDataFrame", CRSobj="CRS"
>> x="SpatialPolygons", CRSobj="CRS"
>> x="SpatialPolygonsDataFrame", CRSobj="CRS"
>> x="ST", CRSobj="CRS"
>>
>> I committed both to r-forge.
>>
> 

-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de