[OSM-dev] AND, the story continued

[Lex Tiekink]

Hi Milo,

 

From: dev-bounces at openstreetmap.org [mailto:dev-bounces at openstreetmap.org]
On Behalf Of Milo van der Linden
Sent: woensdag 18 juli 2007 22:05
To: dev at openstreetmap.org
Subject: [OSM-dev] AND, the story continued

 

Hello list!

I am Milo van der Linden from the Netherlands, a talk-nl member for some
time now. We have been talking the AND data for a while now.

I have a history in advanced routing. I was the lead developer on a GIS
system with routing mechanism for creating drivetime analyses for the dutch
firebrigades. This mechanism routed from up to 90 vehicles per region to up
to 200000 locations to determine if firetrucks arrived within the service
level, based upon mapinfo as an OLE object, rwnet (www.routeware.dk), used a
MSSQL database and was written in VB6. Migration to VB.NET was planned when
I left the company.

On the talk-nl list we have been talking about routing with OSM data. I get
the feeling that with the embracing of AND this comes into clear sight! A
big hail for AND!

I have been reading the AND data integration topic.

I see a lot of navigation ready attributes are still waiting to come in to
OSM, but that is a good thing!

I can see that road-direction is based on FNODE ->TNODE,  when the drawing
direction is unreliable, for routing, a check should be done if drawing
starting node equals FNODE, if not, the sequence of points should be
flipped.

- A question for Lex Tiekink; is information about turn-restrictions also
available in the AND data?

Yes, turn restrictions are available in the data.

- Is there a list that describes the relation between roadspeed and RD_TYPE?

No, there is no standard list available. Every company that uses AND data
for routing makes their own route planning algorithm based on various
attributes in the AND data. It's a matter of interpretation and fine-tuning.


- In what unit is RD_TONNAGE? in kilograms? I can imagine this value is used
to prevent trucks to pass small bridges

In tons.

- How are (for instance) viaducts that are too low for trucks to pass
modelled?

These restrictions are not modelled.

Since roadclass plays a role, would it be a thing to enhance OSM with
transportation-type tables that contain valuable attribute for specifics
methods of traveling?

I don't see this as part of the map data, but part of the route planning
algorithm (and software).

On the talk-nl, we have been talking about setting up a development team to
take our first steps in navigation; currently we have different flavours of
developers; would it be a good thing to start a global development group to
implement so/dll C++ libraries for routing?

Currently; WMS is no longer available on the OSM servers. are there
intentions to get it back up again? Or do you need help?



 

Rgds,

 

Lex Tiekink

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