Re: Multi Level Dwellings and D&B Data

Aaran
> I cant seem to find very much information about handling multiple
> level parcels of data. I did find a PowerPoint presentation from May
> 2002 stating it was being considered. Logic tells me to simply
> collate the parcels together into the cell.
We're still 'considering' this, as in doing research on it. Previously
we have used parcel data and collapsed it into grid cells - see the
report we prepared for the Puget Sound Regional Council for details on
the process: http://www.urbansim.org/projects/psrc/index.shtml

We are now doing some preliminary work to test models at the parcel
level or aggregations of parcels into submarkets or neighborhoods or
zones. When we have some interesting results from this we will post
papers on it.
>
> I am assuming that the lack of a "built_form" or "no_levels" value for
> the parcel table means that the development model uses the
> "built_sqft" that in this case would be greater than the "parcel_sqft"
> to suggest that knocking down 10 floors of apartments is less likely
> than a single level house.
The development model currently only places new development projects in
a cell. It isn't demolishing anything, since we have not previously had
good data on demolitions and conversions. If someone has interesting
data for this, please let me know, as we would like to do some research
on this topic.
>
> Dunn and Bradstreet are charging an arm and a leg for the Employment
> records. I am therefore considering using the "Journey to Work data"
> from the census (i.e. no of employees by industry by SIC/ANZSIC per
> Transit Zone region) and allocating users to commercial and industrial
> land based on small area survey ratios. Has anyone ever been forced
> to do this? In Australia we don't have insurance records due to
> differences in the Social Security System.
>
Some other users (or potential users) may have similar data
limitations. We are interested in having tools to synthesize
micro-level data from marginals, and will be putting some effort into
developing a suite of synthesis tools over the coming year. If anyone
has some skills, algorithms, or suggestions along this line, they would
be welcome.
> I do not expect to get the same quality of results as an Address level
> match to parcel. I can obtain business records for businesses with a
> turnover of over 4 million at a reasonable price. I could then locate
> a percentage of the workers in the transport zone to parcels and
> allocate the rest to unused commercial/industrial zoned land?
>
> Any tips or suggestions from experienced (or otherwise) users would be
> appreciated.
>
Ditto
> (By the way the new OPUS/UrbanSim 4 reference manual and user guide is
> excellent)
>
Good to hear!
> Regards,
>
> 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
>
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Received on Mon Jun 05 2006 - 09:19:46 PDT