[postgis-users] Help with pgRouting & PostGIS

[Pedro Doria Meunier]

Hey Green,

 

I have fiddled with this some time ago... (and I also was left scratching my
head for a while :] )

 

Here’s what I’ve concocted:

 

Using OpenJump:

There a tool called ‘Planar Graph’ under tools->analysis

(uncheck create faces)

 

You’re give two layers à one with all the nodes (and their IDs) and the
other with the edges.

The latter gives you the start and end nodes for each segment


Since pgrouting works by setting turning costs for each node
 You just have
to add another field to this layer and set each node’s turning cost
 ;-)

(you could, of course, transfer the attributes from the original layer (such
as labels, names, etc
) to this layer
)

 

>From this point on it’s a matter of deciding what you want to do under a
programmatical point of view


 

So you see you don’t have to go nuts with all that unfinished topology
support
 ;-)

 

HTH,

Pedro Doria Meunier

 

 

From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Green
Sent: quarta-feira, 25 de Abril de 2007 11:15
To: postgis-users at postgis.refractions.net
Subject: [postgis-users] Help with pgRouting & PostGIS

 

Hi,

I have been using PostGIS for a while and it works great for my requirement.
I have roads & streets as shapefile and now, I wanted to a find the shortest
route between locations.

I found pgRouting during the search process. There they talk about topology.
They have suggested to use 3 tools for creating data for pgRouting and I
don't have access to 2 of them. The one that is familiar to me is PostGIS. I
intalled the topology functions and I am struck without any direction. Now
what ? 

I request any one of you help me and I would greatly appreciate.

I have shapefiles of roads and how do I create data for pgRouting ?

Thanks
Green

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20070425/6384c0ed/attachment.html>