[Community] WFS and PCL
Javier de la Torre
jatorre at gmail.com
Sun Mar 26 20:45:17 EEST 2006
Thanks for the fast answer :).
First of all I can point you to the project I am working on:
This software is being created to support a not very well known
protocol called TAPIR that is similar to WFS. When ready, this
software will hopefully be installed on a lot of different places to
create a network of distributed data providers.
Because the TAPIR protocol is so similar to WFS in some aspects I
started considering providing WFS support to it too.
More specifically I would like to use it to create WFS servers that
publish complex GML application schemas. The PyWrapper library has
some cool classes to generate complex XML structures using an
arbitrary structure on the database used as back-end.
Other requirements of this product is that it must be fast and so is
using SAX and streaming data as soon as it is gathered from the
But the biggest reason for working with this software is that is
going to be deployed potentially in a lot of places and I would like
to have a WFS interface to all those data providers.
The output part of the server, generating the XML from the database
is already done by the main libraries of PyWrapper, I just have to
deal with parsing the request and that is what I am mainly looking
Of course all these software will be released under a public license
so hopefully we can consider sharing resources. I might also consider
On 26/03/2006, at 18:34, Sean Gillies wrote:
> On Mar 26, 2006, at 9:01 AM, Javier de la Torre wrote:
>> Hi all,
>> I am starting a project to create a WFS server on Python. I just
>> want to support Basic WFS, that is read only. Hopefully it will
>> support several databases as the back-end for the data, right now
>> only points.
>> I was wondering if there is something I could reuse from PCL for
>> this project. I have read that PCL supports WFS as a back-end for
>> vector data so I suppose you must have at least a WFS client.
>> Any suggestion will be highly appreciated.
> It is my intention that PCL will allow you make WFS and WMS
> servers, and that PrimaGIS (the Plone product) provide basic WFS to
> go along with its KML output. There is a new feature model in the
> "dublin" branch under PCL-Data that will enable easy serialization
> of features to GML, and our datastore interface allows to specify
> attribute, bounding box, and geometry filters.
> I already have a very basic WFS at http://zcologia.com:9001/
> mapserver/members/, and described at
> Much of this cheapo WFS will be adapted for use in PCL. It uses the
> elementtree library for writing and parsing XML. Adapting the code
> from the cheapo WFS to the new PCL branch is something that could
> be a good collaboration for us. What do you think?
> WMS and WFS client features are currently in the ZCO/ogclib package
> I've been intending to factor them out into a separate project, but
> haven't had the time.
> Sean Gillies
More information about the Community