On Sat, Oct 2, 2010 at 6:12 PM, Justin Deoliveira <[email protected]> wrote:
> Yeah, unfortunately this is a nasty issue. Rob has had this issue before as
> well.
> On the encoding front the plan was to instead of create a geometry not as a
> jts geometry but as a generic complex attribute. And then have the encoding
> subsystem ignore the regular geometry binding (since it is not a geometry
> object) and encode it (along with the metadta) as a generic complex
> attribute.
Wow wow, slow down a little. This seems like a nice idea but I've lost you
at the beginning of the sentence :-)
So say in the database I store something like:
<GeometryWithMetadata>
<myMetadata>...
<myGeometry>...
</GeometryWithMetadata>
How do I go then to turn it into a GML geometry with with metadata like:
<gml:Polygon>
<gml:metaDataProperty>
<gml:GenericMetaData>
<extention>
<area uom="m2">8476875.000000</area>
<length uom="m">108.706000</length>
<width uom="m">13.863100</width>
</extention>
</gml:GenericMetaData>
</gml:metaDataProperty>
<gml:exterior>
<gml:LinearRing>
<gml:posList>
31.214218 43.833347 31.215328 43.833862 31.216240 43.833717 ...
</gml:posList>
</gml:LinearRing>
</gml:exterior>
</gml:Polygon>
Do you have some code skeleton I can follow?
> The parsing front is much harder as Andrea noted. What has been done in the
> past for cases like this and what I think the app-schema folks do is use the
> geometry user data as Andrea noted. But storing a map there that can store
> anything from the crs to this generic metadata. A hack to me sure but not
> sure we have much else. Unless we introduced some sort of geometry wrapper
> that stored all the metadata explicitly.
> All in all rolling your own parser is probably better for your sanity since
> the parsing story for complex features is not quite there yet when compared
> to the encoding story.
Cool
Cheers
Andrea
--
-----------------------------------------------------
Ing. Andrea Aime
Senior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584962313
fax: +39 0584962313
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.linkedin.com/in/andreaaime
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