OGR [was Re: a question about my mapviewer program]

[Jan-Oliver Wagner]

On Thu, Dec 30, 2004 at 01:45:31PM -0800, Chris Barker wrote:
> Jan-Oliver Wagner wrote:
> >Depending on your custom file format, it might be easy
> >to convert it to a standard one. The extension gns2shp does
> >this for example.
> 
> Do you mean convert my file to a shape file, then use this in Thuban?

gns2shp does this indeed.

> If so, yes, this probably wouldn't be too hard. However, my goal is to 
> have a custom Lapp that understands the file formats it needs, without 
> any external translation. Indeed, it will need to create files as well, 
> in a custom format.

We are in the process to demonstrate the addition of other
Layer types via Extensions. The demonstrator is the OGR lib.
The idea is to keep the Thuban core at a minimum size.
(In fact we should eventually try to refactor PostGIS or GDAL out of Thuban
core into Extensions :-)

> while I'm at it, is there an easy/efficient way to deal with thousands 
> of points with a value associated with them?

Depends on what you are actally doing.
The PIROL project (see
http://thuban.intevation.org/download.html#contrib)
does work a lot with huge numbers of points.

> Clearly I need to spend some time really delving into the code.

Any contribution is very welcome. We'll try to answer questions
as good as possible.

Best

	Jan
-- 
Jan-Oliver Wagner               http://intevation.de/~jan/

Intevation GmbH                      http://intevation.de/
FreeGIS                                http://freegis.org/