[R-sig-Geo] WMS, WFS, WCS an WPS for R

[Jorge de Jesus]

Hi

Everything concerning the OGC standards and R are covered in the last
posts.  It is possible to assemble specific WxS/WPS requests and deal
with the response from the servers, using the RCurl package. Also the
r-cran-xml package should have any problems parsing the returned results

Using Rcurl, means more work and more technical skills that using some
client specific for one of the WxS/WPS services.
Best
Jorge


Edzer Pebesma wrote:
> Interesting question!
>
> Of course, all these are services, and R is not typically a service or
> a client, but rather an environment to do statistical computing.
> Reading and writing can, as mentioned, be done to some extent through
> OGR (WFS, e.g. by writing gml) and GDAL (WCS, reading). Note that gml
> has many versions, and the more recent ones are typically monsters of
> complexity; OSGEO seems to support mainly older versions or subsets
> for specific application areas. WMS is more something of an output,
> useful for those who want to see the map rather than have the data.
>
> We're currently working in the intamap project
> (http://www.intamap.org) to provide R interpolation facilities through
> a web processing standard, which basically means GIS (or any other)
> processing through an OGC complient web service (WPS, as opposed to
> e.g. SOAP). Here, R does the back end work, and the WPS front-end
> takes care of input (an O&M, observations and measurements document,
> xml) and output (gml for geometry, UncertML for probability
> distributions). If someone is interested in testing this, please let
> me know.
>
> Other OGC services to check out are those in the SWE area: SOS, SPS,
> SAS, this list is growing faster than an adult can learn remembering
> abbreviations.
> -- 
> Edzer
>
>
> Roger Bivand wrote:
>> On Sat, 22 Nov 2008, Barry Rowlingson wrote:
>>
>>> 2008/11/22 Hisaji ONO <hi_ono2001 at ybb.ne.jp>:
>>>> Hello.
>>>>
>>>>  There are lots of services of OGC(Open Geospatial
>>>> Consortium:http://www.opengeospatial.org/)'s standard
>>>> based Geo-Web ervices incluing WMS(Web Map Service),
>>>> WFS(Web Feature Service), WCS(Web Coverage Service) and
>>>> WPS(Web Processing Service) all over the world.
>>>>
>>>>  Does anyone try to use these services from R?
>>>
>>> Any access to WMS and WFS would probably be best done using GDAL and
>>> OGR via the rgdal package.... Let's see...
>>>
>>> GDAL has a WMS driver, but it seems you do have to create a 'local
>>> service description' file. www.gdal.org seems down at the moment, so
>>> here's a google cache link:
>>>
>>> http://216.239.59.132/search?q=cache:21OOLtr9yj0J:www.gdal.org/frmt_wms.html+gdal+wms&hl=en&ct=clnk&cd=1&gl=uk
>>>
>>>
>>> For WFS, there's some recent discussion on the gdal-dev list:
>>>
>>> http://www.nabble.com/OGR-WFS-driver-td20485363.html
>>>
>>> so it might be coming soon. Can you wait?
>>>
>>> To do WFS from scratch in R is probably going to need XML parsing,
>>> and then it'll probably also need OGR too unless you want to hand-code
>>> understanding the returned GML...
>>
>> Yes, so OGR needs to be built against the Xerces libraries. I agree
>> that WMS and WFS are best handled by using work that is already going
>> on in the OSGeo community. An example of R in a a WPS setting is:
>>
>> Katharina Henneböhl, Edzer Pebesma:
>> Providing R functionality through the OGC Web Processing Service
>>
>> given at useR! 2008 in Dortmund in August - there is an abstract on
>> the conference website. I think that their trial site may be ready
>> before long, together with the underlying software.
>>
>> Roger
>>
>>>
>>> Barry
>>>
>>> _______________________________________________
>>> R-sig-Geo mailing list
>>> R-sig-Geo at stat.math.ethz.ch
>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>
>>
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>>   
>


-- 
Ph.D. Jorge Samuel Mendes de Jesus

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