[udig-devel] GML loading - over the top?

[Paul Ramsey]

Snowflake doesn't have to guess, they know the structure of OSM  
exactly in advance. So they can deal with things like interlinkages  
quite smartly.  We'd need a topology model to even get started with  
this stuff... or at least enough understanding of topology to  
recognize it when we see it and build simple features with link  
attributes that refer correctly to each other's identifiers.

Since this kind of GML only comes around rarely, simply building  
purpose-built importers (ala snowflake) case-by-case is almost the  
preferred approach.

P

On 12-Sep-07, at 2:10 PM, Jody Garnett wrote:

> Vince Darley wrote:
>> The freeware Snowflake GML viewer manages to load all this data  
>> and visualise it very nicely, however, so I can at least assure  
>> you the data is good!
> Very cool, can you send us a link? It would be nice to see this in  
> action ... the parsers you have been using here with uDig really  
> pay attention to the XSD file; most of the viewers I have met just  
> go through the file and "guess" based on where they see Geometry used.
>
> Reading through ISO19109 they have an example where literally Road  
> extended LineString, our parser should work while the simple  
> solutions will fail...
>
> Cheers,
> Jody
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