Re: [UrbanSim-Users] Own identifiers: zone_id, grid_id, group_id, etc.

Mark,

In such a case I would recommend to update to a newer version of Opus.
Since 4.0 we have fixed many bugs, one of which might be cause of your
problem.

Hana

Mark Kryvobokov wrote:
>
>
> Hana,
>
> We send you our "old" information as well as something new.
> Thank you for your reply, but we checked all the tables. There are no
> grid_id values in the household table and in any other table that do not
> exist in the gridcell table. The same was checked for zone_id values.
> So, it should be other reason of the error.
>
> We wrote the following script to check if simulation is sensible to
> zone_id values. In the Eugene database, we increased zone_id values
> where they were more than 100:
>
> UPDATE Zones Z
> Set Z.zone_id = Z.zone_id+650000000 where Z.zone_id > 100 ;
> Commit;
>
> UPDATE gridcells Z
> Set Z.zone_id = Z.zone_id+650000000 where Z.zone_id > 100 ;
> Commit;
> UPDATE travel_data Z
> Set Z.from_zone_id = Z.from_zone_id+650000000 where Z.from_zone_id > 100 ;
> Commit;
>
> UPDATE travel_data Z
> Set Z.to_zone_id = Z.to_zone_id+650000000 where Z.to_zone_id > 100 ;
> Commit;
>
> While running simulation, we obtained the same errors as described
> before. So, zone_id values seem to be important. We suppose that zone_id
> values are used for access 'numarray" data (as commented in the method
> aggregate_over_ids() of opus_core/dataset.py).
>
>
> Hakim,
>
> We checked again our tables. Grid_id values are not duplicated in the
> gridcells table and in other tables. Zone_id values are not duplicated
> in any table as well.
>
> Thanks for your responce,
> Philippe and Mark
>
>
> > --- Исходное сообщение ---
> > От кого: Hana Sevcikova (hana_at_cs.washington.edu)
> > Кому: Mark Kryvobokov
> > Дата: 27 сентября, 02:58:07
> > Тема: Re: [UrbanSim-Users] Own identifiers: zone_id, grid_id,
> group_id,etc.
> >
> > > Mark,
> > >
> > > I can handle the first part of your question:
> > >
> > > The error comes due to a mismatch between grid_id in gridcells and
> > > grid_id in households. I assume there are some values in the
> households
> > > table that do not exist in the gridcells table. Please check.
> > >
> > > It should not be connected to the fact that there is a big difference
> > > between the max and min of your zone_id. However, the code will run
> more
> > > efficiently, if the difference is small (about twice of the number of
> > > elements in the table). This fact applies to any dataset.
> > >
> > > Hana
> > >
> > >
> > >
> > > On Tue, 25 Sep 2007, Mark Kryvobokov wrote:
> > >
> > > > Hello!
> > > >
> > > > We still use UrbanSim version 4.0 (though we are thinking about
> the updating).
> > > >
> > > > We have a question about the creation of our own identifiers. We
> tried to use our own zone_id (unique integer values with the range of
> 10050000 to 693890604) . We changed the Eugene zone_id values with our
> zone_id values in zones and gridcells tables. We changed
> also from_zone_id and to_zone_id values in travel_data table. After
> that simulation running failed while executing the Commercial Employment
> Location Choice Model. This is a part of the traceback message:
> > > >
> > > >
> > > > File
> "C:\MyNew\projects\OPUS\opus-4.0\urbansim\gridcell\population.py", line
> 34, in compute
> > > >
> > > > return self.get_dataset().sum_dataset_over_ids(households,
> self.hh_persons)
> > > >
> > > > File "C:\MyNew\projects\OPUS\opus-4.0\opus_core\dataset.py", line
> 1118, in sum_dataset_over_ids
> > > >
> > > > return self.aggregate_dataset_over_ids(dataset, "sum",
> attribute_name, constant)
> > > >
> > > > File "C:\MyNew\projects\OPUS\opus-4.0\opus_core\dataset.py", line
> 1148, in aggregate_dataset_over_ids
> > > >
> > > > return self.aggregate_over_ids(dataset_id_values[used], values,
> function)
> > > >
> > > > File "C:\MyNew\projects\OPUS\opus-4.0\opus_core\dataset.py", line
> 1112, in aggregate_over_ids
> > > >
> > > > raise StandardError, "Unknown function " + function + " or error
> occured during evaluation."
> > > >
> > > > StandardError: Unknown function sum or error occured during
> evaluation.
> > > > We suppose that the reason or the error is a big difference
> between max and min values of zone_id. Could somebody confirm this
> and/or explain why it is so?
> > > >
> > > > Our next question is about group_id. In development_type table
> for Eugene, we see min_sqft and max_sqft for different development
> types. Is there some rule according to which a gridcell should belong to
> e.g. industrial or commercial group if there are different types of
> development? Can we formulate our own rules?
> > > >
> > > > Thank you in advance,
> > > > Mark and Philippe
> > >
> >
> >
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Received on Tue Oct 02 2007 - 10:09:27 PDT