On Sun, Aug 23, 2009 at 02:04:55PM -0700, Brian M Dube wrote:
> Greetings,
>
> I see in the OpenMap FAQ that a generic system to handle the
> associations between a shape file and its attribute table has not been
> implemented. I'm working on a custom implementation, and I'm stuck.
Can I improve or clarify my question, or did I overlook where this has
been handled in the archives or documentation?
> I'm working with r2054 from the svn repository. One of the shape files
> I want to use is a Census TIGER/Line file that describes all edges at
> the county level (roads, water features, railways, etc.) and is quite
> a large file. I was running out of heap space in
> DbfInputStream.readData() because of the size of the file, and
> readData() is called directly from DbfInputStream.<init> (the constructor).
>
> So I copied DbfInputStream to my project and, with some modifications,
> made a small tool to populate HSQLDB tables with the records in the
> dbf file passed to the tool. This worked really well.
>
> This is where I'm stuck. I don't know which OpenMap component to
> customize to use the attributes that are now in the HSQLDB tables. Is
> it ShapeLayer? or a new DbfHandler that reads from the database?
>
> The goal is to use SQL queries on the attribute table to limit what
> geometry is drawn from the shape file. Highways and streets, for
> example.
>
> Thanks,
> Brian
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Received on Thu Oct 15 2009 - 22:51:30 EDT