[R-sig-Geo] spacetime and sf

[Edzer Pebesma]

Dear ƒacu,

spacetime will remain the way it is, just like sp, too much stuff
depends on how it is now.

For STFDF objects in spacetime, a follow-up package is stars: it
supports raster and vector data cubes, and can deal with more cube
dimensions than STFDF ever could; it also gets better dealing with e.g.
large satellite images.

For the STIDF (irregular: s/t point patterns) there is currently no
follow-up package that builds on top of sf. As you note, its
functionality would be pretty much limited to registering which column
denotes time in an attribute, and add a class label. So far, I haven't
considered that worth the effort: you may have to add lots of method
instances to have that information survive all the current methods
available for sf objects.

Have you thought about giving the time variable a fixed name? Or is
there a need for maintaining multiple time variables in sf objects?

Best,

On 6/4/19 5:01 PM, Facundo Muñoz wrote:
> Dear Edzer,
> 
> How do you conceive the future of the package `spacetime` and more
> generally, the representation of spatio-temporal data, in light of the
> transition from `sp` to `sf`?
> 
> For context, I'm working on a package that handles spatio-temporal point
> patterns. For my analyses I have relied on `sf` with some additional
> attribute for the dates. However, for packaging I think it is safer to
> rely on explicit classes for spatio-temporal data (so I don't have to
> worry all the time about which is the temporal variable, in which
> format, etc.). But it seems that only `spacetime` provides such classes
> generically, which in turn relies on `sp` for the spatial dimension. Is
> this going to continue to be supported or are there other plans?
> 
> Thanks in advance
> 
>         ƒacu.-
> 

-- 
Edzer Pebesma
Institute for Geoinformatics
Heisenbergstrasse 2, 48151 Muenster, Germany
Phone: +49 251 8333081

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