[fdo-internals] Motion: Vote on FDO RFC 38 - SHP multi-polygons

[Jason Birch]

+1 Jason

2009/9/8 Dan Stoica <dan.stoica at autodesk.com>

> Hi Frank,
>
> > Does the FDO SHP driver ensure proper winding order for inner and outer
> rings when writing shapefiles?
>
> No, it doesn't. We've discussed here this issue and apparently the best way
> to do it is via a new capability that tells the preferred ring orientation.
>
> But this will not solve the problem of reading existing shapes (created via
> FDO or not) since the orientation is not reliable.
>
> Thanks,
> Dan.
>
>
> -----Original Message-----
> From: fdo-internals-bounces at lists.osgeo.org [mailto:
> fdo-internals-bounces at lists.osgeo.org] On Behalf Of Frank Warmerdam
> Sent: Tuesday, September 08, 2009 8:09 AM
> To: FDO Internals Mail List
> Subject: Re: [fdo-internals] Motion: Vote on FDO RFC 38 - SHP
> multi-polygons
>
>
> > There were no further comments on this RFC:
> > http://trac.osgeo.org/fdo/wiki/FDORfc38 - Multi-polygon support for SHP.
> >
> >
> >
> > I would like to motion a vote to accept this RFC.
>
> +1
>
> ---
>
> On final review I was somewhat concerned about the comment "On input of
> geometry, there is no further processing needed as the current code will
> save all input loops without checking whether they are outer or inner."
>
> There is a particular winding order expected in properly produced
> shapefiles.
> Does the FDO SHP driver ensure proper winding order for inner and outer
> rings when writing shapefiles?
>
> Best regards,
> --
>
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam<http://pobox.com/%7Ewarmerdam>
> and watch the world go round - Rush    | Geospatial Programmer for Rent
>
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