[OpenMap Users] Using VPFFeatureGraphicWarehouse

Don,

Thanks for the pointer regarding vpfserver. I have this running with
tomcat and it is very helpful in navigating the Vpf database.

In extending VPFLayerGraphicWarehouse I am still unable to get the
feature class ( eg "builtupa" ) using the List object as a reference
to another table ( "fcs" table ).

My best bet is probably to extend VPFFeatureGraphicWarehouse. As you
mentioned the createArea method in VPFFeatureGraphicWarehouse contains
the feature class. However, I was not able to figure out how to use
the VPFFeatureGraphicWarehouse.

If adding a VpfLayer to the MapBean calls VPFLayerGraphicWarehouse how
do I get the program to use VPFFeatureGraphicWarehouse instead?

Thanks again.

 Regards,
 Mike Harrison

----- Original Message -----
From: "Don Dietrick" <dietrick@bbn.com>
To: "Michael Harrison" <mhh@ll.mit.edu>
Sent: Tuesday, February 24, 2004 12:37 PM
Subject: Re: [OpenMap Users] Help with computeEdgePoints(...)

Hi Mike,

If you extend the VPFFeatureGraphicWarehouse, the createArea method
gets called with the feature name of the area. For the other
warehouse, I think the List object contains some reference in a table
where the feature name can be found.

You might want to check out the new vpfserver that is in the latest
version of OpenMap. Its a servlet that navigates through the VPF files
and directories, showing what the contents are and how they
cross-reference other file tables. It's a big help in understanding
where all that information is in the database. Instructions are
included in the openmap/src/vpfserver directory.

- Don

On Feb 23, 2004, at 5:11 PM, Michael Harrison wrote:

> Hi Don,
>
> I am re-writing the project that I worked on last fall where I
> extended VPFLayerGraphicWarehouse and created a custom output of Vmap
> data.
>
> One thing that I need to add is the feature class ( "cropa", "grassa",
> etc ). In createArea the CoverageTable and AreaTable are inputted. Is
> there any way to get the feature class from these objects in
> createArea?
>
> Thanks for any help.
>
> Regards,
> Mike Harrison
>

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