RE: UrbanSim 3 vs. 4

Hi All,

I have been working on Urbansim for quite a few weeks now. I have briefly
seen Urbansim 3 before concentrating on Urbansim 4 and it seems to me that
Urbansim 4 is a lot more flexible and there is more functionality than
urbansim 3.

It seems to me that all the new users, including me are having problems with
running all the models.

I have managed to make "RUN" work but not yet "estimate":

pre_scheduled_events
events_coordinator
land_price_model
household_transition_model
household_relocation_model
household_location_choice_model

A lot of the times, the problems associated with running the models just
comes down to having the proper database format and running the models in
sequence as, One output of the model is an input to another. (i.e. the
household_reloction_model outputs the hrm_index which inturn is used by the
household location choice model)

For the meantime before the people at Urbansim will finish creating a
revised database, I would be happy to send anyone my revised
eugene_baseyear......(its mainly the converted US3 and then some.) ...that
will work on the models listed above.

If anyone else has working models i.e. the new employment_location_choice
model or developer models and wouldn't mind sharing their code or database
or part their of...that would be great.

I think everyone who just started using urbansim4 are in the same boat,a
little cooperation between the community will go a long way.

Best Regards,

Joe

-----Original Message-----
From: Aaran Stent <aaran.stent_at_nieir.com.au>
To: "'users_at_urbansim.org'" <users_at_urbansim.org>
Date: Mon, 30 Oct 2006 12:30:00 +1100
Subject: RE: UrbanSim 3 vs. 4

> Hi Jen,
>
> I think you have summarised the problem very well. Opus and UrbanSim 4
> provide a great set of new features and will offer ongoing support.
> However the biggest issue with UrbanSim 4 is that it simply will not
> work out of the box like UrbanSim 3.
>
> I have had two developers working on UrbanSim 4 for several weeks now
> and they are yet to get the test database and all of the models in
> working order. When I first looked at UrbanSim in Feb 2006 I was able
> to have a running simulation that I could then experiment with in a
> single day.
>
> My developers have stated there are a lot of hard coded references to
> the University server causing a lot of things to break. There are also
> numerous differences in what the documentation states versus the source
> code. The team is stepping through correcting a lot of code instead of
> working on models and scenarios. We are planning to share our changes
> via our SVN server once we have a working model running.
>
> The Java version is your best option in my honest opinion. It provides
> a working system in just a few hours. UrbanSim 4 will not.
>
> PS. I don't mean to come down hard on UrbanSim 4 as it is such a huge
> step forward from version 3, it simply isn't ready for widespread use
> like UrbanSim 3 is.
>
> Aaran Stent
> National Economics
> aaran.stent_at_nieir.com.au <mailto:aaran.stent_at_nieir.com.au>
> 416 Queens Parade
> Clifton Hill VIC 3068
> Ph: 0419 227 262
>
>
>
> -----Original Message-----
> From: users-bounces_at_urbansim.org [mailto:users-bounces_at_urbansim.org]On
> Behalf Of Jennifer C. Duthie
> Sent: Saturday, 28 October 2006 1:44 AM
> To: users_at_urbansim.org
> Subject: UrbanSim 3 vs. 4
>
>
> Hi,
>
> I'm working on a research project for TxDOT looking at what type of
> land
> use model is best for each type of region (defined by size, resources,
> need, ...) depending on a variety of factors. I had been trying to get
> UrbanSim 4 running for awhile and was having some of the same problems
> as Zachary, so I just this week switched to UrbanSim 3.
> Although there are many advantages to UrbanSim 4 (as listed
> http://www.urbansim.org/news/index.shtml#opus), we're worried that
> there
> are still some bugs in the code and the documentation has not yet been
> ironed out. Also, it is very helpful to have the Eugene test database
> running for the earlier version. As we're looking for general
> conclusions about types of models, we feel this should suffice. My
> only
> concern is that the Java version is no longer being maintained, so if
> we
> do have a problem it may be more difficult to get it resolved.
>
> I just wanted to see if anyone on this list had any convincing
> arguments
> as to why we shouldn't use the Java version for our research...
>
> Thanks!
> Jen Duthie
> PhD Candidate
> Transportation Engineering
> University of Texas, Austin
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Received on Sun Oct 29 2006 - 17:12:32 PST