[R-sig-Geo] RSAGA Vectorizing Grid Classes creates unclosed rings

[Johan Van de Wauw]

This is a known error in SAGA.
It will be fixed in the next version
http://saga-gis.cvs.sourceforge.net/viewvc/saga-gis/saga_2/src/modules/shapes/shapes_grid/Grid_Classes_To_Shapes.cpp?view=log

On Tue, May 11, 2010 at 8:02 PM, manuel.schneider
<manuel.schneider at art.admin.ch> wrote:
> Roger Bivand <Roger.Bivand <at> nhh.no> writes:
>
>>
>> On Tue, 11 May 2010, manuel.schneider <at> art.admin.ch wrote:
>>
> ...
>> > Error in is.vector(X) : ring not closed
>>
>> http://shapelib.maptools.org/dl/shapefile.pdf
>>
>> does specify that a polygon in a shapefile must be closed. You may be able
>> to use readShapePoly(..., force_ring=TRUE) in maptools to work around the
>> problem.
>>
>> Roger
>>
>>
>
> As always, your suggestion does the trick. Thanks a lot.
> However, still puzzled why it occurs.
>
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