[Geowanking] FeatureType Modeling

Jody Garnett jgarnett at refractions.net
Fri Aug 19 07:45:32 PDT 2005


Paul Selormey wrote:

>Please review the document. It has spelling and other mistakes.
>
>For instance, on the Shapefile section you will find
>
>Feature         entry in shp file, using shx to find a row in dxf file 
>
>Shapefile definitely has nothing to with dxf file! you mean dbf file, right?
>  
>
Thanks - this is an initial draft (It is also a wiki if you want to just 
hack the document). This morning I am comparing the tradeoff between 
FeatureType inheirtence and how you refer to Attribtues.

A lot of the toolkits use support AttributeType lookup by int, while at 
the same time saying they support a "super" FeatureType.  The first 
person to try an implement this would be in for a rude shock when making 
a collection of mixed content ...

I find it facinating that all the OO toolkits are having trouble with 
the problem. Perhaps if people were using a dynamic language like Ruby.

Jody




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