[Pywps-devel] creating GRASS locations per default

[Jachym Cepicky]

Hallo,
when we started the work on PyWPS, we were thinking, that GRASS will be
nearly allways used as *the* working tool for all processes.

When I saw Song's work [1] (great on-line R examples) I see, that other
tools will be / are allready used not less, then GRASS.

Currently, everytime, wps.py is called, temporary GRASS  location is
created and all environment variables are set, so direct usage of GRASS
modules is possible (starting with g.region and r.in.ogr or v.in.ogr
..).

But as this will be not wanted feature, I'm thinking about, how to get
rid of this feature.

I see these possibilities:

    1 - temporary location will be created, only when self.grassLocation
        is set to "[temp]" key word

    2 - temporary location will NOT be created only when self.grassLocation
        exists in process definition and is set to None, but it would be
        created by default.

This sollutions do have following issues:

    1 - all allready defined processes, which are using GRASS will have
        to define self.grassLocation="[temp]"

    2 - all processes, which do not want to use GRASS will have to think
        at, that they have to add self.grassLocation=None to the process

What do you think? IMHO better sollution for the future is #1

Thanks

Jachym

[1] http://zihuan.gucas.ac.cn/PyWPS_GNUR_Example.html
-- 
Jachym Cepicky
e-mail: jachym.cepicky at centrum.cz
URL: http://les-ejk.cz
GPG: http://www.les-ejk.cz/pgp/jachym_cepicky-gpg.pub
-----------------------------------------   
OFFICE:                                     
Department of Geoinformation Technologies 
Zemedelska 3
613 00, Brno
Czech Republick
e-mail: xcepicky at node.mendelu.cz
URL:    http://mapserver.mendelu.cz
Tel.:   +420 545 134 514
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: Digital signature
Url : http://lists.wald.intevation.org/pipermail/pywps-devel/attachments/20061110/a3b507ef/attachment.pgp