[gdal-dev] UnionCascaded operation failed

[Ahmet Temiz]

Ok, thanks.

On Mon, Jul 1, 2019 at 8:39 AM Casper Børgesen <caboe at sdfe.dk> wrote:

> A very quick guess would be that you have changed the polyCollect type
> from a geometry type to a list of geometries. I don’t think the list of
> geometries has a UnionCascaded method. I would probably go for a
> polyCollect geometry type of MultiPolygon instead of the list/vector, that
> way you should be able to run the UnionCascaded method.
>
>
>
> /Casper
>
>
>
> *From:* gdal-dev <gdal-dev-bounces at lists.osgeo.org> *On Behalf Of *Ahmet
> Temiz
> *Sent:* 29. juni 2019 19:47
> *To:* gdal-dev <gdal-dev at lists.osgeo.org>
> *Subject:* [gdal-dev] UnionCascaded operation failed
>
>
>
> Hi,
>
>
>
> Using C++ I try to buffers from LineStrings,Then I want to union the
>
> resulting polygons with UnionCascaded.
>
> But at UnionCascaded operation failed with:
>
> "error: ‘class std::vector<OGRPolygon*>’ has no member named
> ‘UnionCascaded’
>      OGRGeometry *result=polyCollect.UnionCascaded();
>
> "
>
> Can you tell me what I am doing wrong?
>
>
>
> here is the related code fragment:
>
>
>
>     std::vector<OGRPolygon * > polyCollect ;
>     //OGRGeometryCollection *polyCollect ;
>
>     while( (poFeature = poLayer->GetNextFeature()) != NULL )
>     {
>
>         OGRGeometry *poGeometry = poFeature->GetGeometryRef();
>
>         if( poGeometry != NULL
>                 && wkbFlatten(poGeometry->getGeometryType()) ==
> wkbLineString )
>         {
>             OGRLineString *poLine = (OGRLineString *) poGeometry;
>    //
>             OGRGeometry *bufGeometry = poLine->Buffer(100,30);
>    OGRPolygon *bufPoly=  static_cast<OGRPolygon *> (bufGeometry) ;
>             printf( "%s \n", bufPoly->getGeometryName());
>
>    //polyCollect->addGeometryDirectly (bufPoly );
>             polyCollect.push_back(bufPoly );
>         }
>         else
>         {
>             printf( "no point geometry\n" );
>         }
>
>         OGRFeature::DestroyFeature( poFeature );
>     }
>
>     OGRGeometry *result=polyCollect.UnionCascaded();
>
>
> --
>
> Ahmet Temiz
> Jeoloji Müh.
> Afet ve Acil Durum Yönetimi Başkanlığı
> Bilgi İşlem  Dairesi Başkanlığı-CBS Grubu
>
>
> ________________________
>
> Ahmet Temiz
> Geological Eng.
> Information Systems - GIS Group
> Disaster and Emergency Management
> of Presidency
>


-- 
Ahmet Temiz
Jeoloji Müh.
Afet ve Acil Durum Yönetimi Başkanlığı
Bilgi İşlem  Dairesi Başkanlığı-CBS Grubu


________________________

Ahmet Temiz
Geological Eng.
Information Systems - GIS Group
Disaster and Emergency Management
of Presidency
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