[QGIS-Developer] R provider for QGIS 3 - any interest?

[Nyall Dawson]

On 26 April 2018 at 22:10, Barry Rowlingson
<b.rowlingson at lancaster.ac.uk> wrote:
> As a long-time R spatial developer and QGIS user I'll be glad to help out -
> but time-poor at work for now. "Helping out" may be more  like "making
> unreasonable suggestions" and "finding annoying bugs".

Don't undersell yourself... these would be very valuable contributions!

> For example, can we find a more efficient way to transfer data from QGIS to
> R? Can the new `sf` packages in R work with the data straight out of QGIS'
> memory? I *think* the `sf` package stores vector data in GDALs native C++
> objects, and if QGIS is doing that too then we *might* be able to get access
> from QGIS and R if we write the R plugin as a C/C++ module that dynamically
> links with the shareable libR.so.

I've (very roughly) looked into this, and I also believe it should be
possible to directly create R data frames from QGIS layers. Then we'd
just need to add a "R console" to QGIS, and boom! Awesome spatial
statistical analysis tool directly within QGIS!

Nyall

>
> The current R processing plugin  converts QGIS layers to shapefiles, reads
> them into a new R process. On occasion I've hit problems with shapefile
> limitations (field name length, usually) that make my scripts fail. Maybe it
> should go via geopackage instead.
>
> Should it create `sp` objects on the R side or `sf` objects? This could be
> controllable in the R processing script headers, so it can be set on a
> per-script basis.
>
> I'll stop now...
>
> Barry
>
>
>
>
>
>
> On Thu, Apr 26, 2018 at 9:42 AM, Aurelio Pires <anvpires at gmail.com> wrote:
>>
>> +1
>>
>> Thanks,
>>
>>
>> On 2018-04-26 07:40, Paolo Cavallini wrote:
>> > Hi all,
>> >
>> > Il 26/04/2018 05:08, Nyall Dawson ha scritto:
>> >> I'm VERY interested in seeing this resurrected. I'm available to
>> >> mentor this task if someone else wants to take ownership of the plugin
>> >> and do the port, OR alternatively I'd be happy for North Road to do
>> >> the porting ourselves and take over maintenance if someone can fund
>> >> this work.
>> > that's good news. So starting a crowdfunding campaign seems a good way
>> > to go, unless there is a bigger sponsor; do you agree?
>> > All the best, and thanks.
>> >
>>
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