[R-sig-Geo] Intended usage of gIntersection ?

[Barry Rowlingson]

I think we should merge and unify sp, rgdal, rgeos and raster...

 > require(gis)

/dreams


On Sat, Sep 13, 2014 at 8:58 PM, Bernd Vogelgesang
<bernd.vogelgesang at gmx.de> wrote:
> Hi Robert,
>
> GREAT! It works!
> I think you saved my week(end).
> Would have never guessed that the raster package will do such things, so I
> completely avoided to search in such a direction.
>
> Maybe I will learn to do the trick with gIntersection one day, but for
> today, I'm on the winner street again with raster intersect, Crazy!
>
> Cheers
> Bernd
>
> Am 13.09.2014, 19:44 Uhr, schrieb Robert J. Hijmans <r.hijmans at gmail.com>:
>
>> The raster package has a few functions that extend rgeos by also
>> attempting to handle attribute data as well. In this case, see
>> raster::intersect
>> And the list of functions here:
>> ?"raster-package"
>> (section XIV)
>>
>> Robert
>>
>> On Sat, Sep 13, 2014 at 10:04 AM, Bernd Vogelgesang
>> <bernd.vogelgesang at gmx.de> wrote:
>>> Dear list,
>>>
>>> I'm trying to intersect two SpatialPolygonsDataFrames imported from
>>> shape
>>> files. (readOGR)
>>> The idea is to get the new polygons + the merged attributes of both
>>> layers,
>>> but the outcome is a SpatialPolygon class without a data slot.
>>>
>>> Is this the intended behaviour of gIntersection or is there something
>>> broken
>>> in my R-Installation, cause I googled now for 2 days to find a solution
>>> on
>>> that problem, but only found two hits on stackexchange where people had
>>> similar problems, and no working solution (at least for me), nor was I
>>> able
>>> to find any standard recipt how to join the attributes back to the new
>>> polygons.
>>>
>>> So obviously only rare people seem to have the need to get also the data
>>> from an intersection or do I miss some really basic R-capabilities not
>>> worth
>>> to write down in any documentation??
>>>
>>> Hope someone can shed some light
>>> Thanks
>>> Bernd
>>>
>>> --
>>> Bernd Vogelgesang
>>> Siedlerstraße 2
>>> 91083 Baiersdorf/Igelsdorf
>>> Tel: 09133-825374
>>>
>>> _______________________________________________
>>> R-sig-Geo mailing list
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>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
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