Edzer Pebesma <edzer.pebe...@uni-muenster.de> writes: > On 02/11/2015 03:42 PM, Rainer M Krug wrote: >> Edzer Pebesma <edzer.pebe...@uni-muenster.de> writes: >> >>> On 02/11/2015 02:52 PM, Rainer M Krug wrote: >>>> Roger Bivand <roger.biv...@nhh.no> writes: >>>> >>>>> Since I'm uncertain whether the maintainer of spacetime is on this >>>>> list, I'm CC-ing him here. It might make sense to discuss this - >>>>> perhaps spgrass7 in the R-forge spgrass project is a logical place to >>>>> support these functions? >>>> >>>> It is a brilliant idea to support spatio-temporal data in the spgrass7 >>>> framework. >>>> >>>> I agree that the functions should be in spgrass7 and that they should >>>> have the same interface structure as the other read/write[RAST/VECT] >>>> functions. >>>> >>>> I never used the package spacetime or spatio-temporal datasets in GRASS, >>>> but maybe these functions could be re-used (or at least parts of it)? >>> >>> yes; and use the TGRASS (Cc: Soeren, the author), framework. Also, >>> raster stacks with time z should be of interest (Cc: Robert). >> >> Please forgive my ignorance - but is there actually an accepted (as >> SpatialGridDataFrame et al are accepted) object framework for these >> spatio-temporal datasets in R? It sounds as if there is not at the moment? > > When is something accepted?
Sorry - forgot to add "..." around the word accepted. > raster and spacetime have both been on CRAN for some years, and have > both been considered usefu`l by people independent from the > developers. There is a SpatioTemporal task view that tries to list > everything possibly relevant. As I said, I haven't used the spatio-temporal data in a while, and when I did, I used a home made approach to analyse these. So I don't know what the status is now and which class would be the best to import the data in *to have them in a format which can be converted to other spatio-temporal formats used in other packages*. Looking at "spacetime: Spatio-Temporal Data in R" [1] I aagree that the classes are there. Cheers (and I should have looked at the task view before), Rainer > >> >>> >>>> >>>> But this should not hold back the release of spgrass7 in it's current >>>> form. >>> >>> I suggest to rename this package to "grass", supporting the current >>> grass release. >>> >>> Grass took 7 years to move 6 to 7; I discussed this with Markus last >>> night, they might as well give up this crazy major version release cycle >>> idea, with all kind of restrictions they impose on themselves. >> >> This might cause confusion. And as long as GRASS has major versions, I >> think we should stick with this naming scheme. > > We don't do this with rgdal, rgeos, RSAGA, RArcInfo, and so on. But many > of these have an "r" in front. This seems obsolete as they are R > packages, but may be helpful in sentences like "We used grass and the > r-package rgrass for carrying out multidimensional scaling on the MODIS > imagery ...", which, without the leading r, would have the word "grass" > twice in it referring to different things. > > spgrass has sp in it for historic reasons - we thought about prefixing > everything with sp in the early sp days. Now sp is default, and one > could think about a better name. > >> >> Cheers, >> >> Rainer >> >>> >>>> >>>> Cheers, >>>> >>>> Rainer >>>> >>>>> >>>>> Roger >>>>> >>>>> >>>>> On Wed, 11 Feb 2015, Veronica Andreo wrote: >>>>> >>>>>> Hi >>>>>> >>>>>> Since you are discussing the new spgrass for GRASS 7 (and since GRASS 7 >>>>>> includes these great temporal modules), I was wondering if there's any >>>>>> chance to include support for reading/writing spatio-temporal data sets. >>>>>> >>>>>> At present, there are two functions in spacetime package (read.tgrass and >>>>>> write.tgrass) that allows reading and writing strds, but you need to >>>>>> export >>>>>> it from GRASS first, do the R processing you need, and then, import it >>>>>> back >>>>>> into GRASS. To have something a bit more straightforward would be >>>>>> awesome! >>>>>> >>>>>> I don't know how complicated this could be, that's why I dare to ask :) >>>>>> >>>>>> Keep the great job you are doing!!! And thanks a lot!!! >>>>>> >>>>>> Cheers, >>>>>> Vero >>>>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> grass-stats mailing list >>>> grass-stats@lists.osgeo.org >>>> http://lists.osgeo.org/mailman/listinfo/grass-stats >>>> >> Footnotes: [1] http://cran.r-project.org/web/packages/spacetime/vignettes/jss816.pdf -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax : +33 - (0)9 58 10 27 44 Fax (D): +49 - (0)3 21 21 25 22 44 email: rai...@krugs.de Skype: RMkrug PGP: 0x0F52F982
signature.asc
Description: PGP signature
_______________________________________________ grass-stats mailing list grass-stats@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-stats
