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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: GISList: Re: [Manifold\ Re: GISList: Wow! SDTS Data overload... |
| Date: |
12/23/2001 09:22:53 PM |
| From: |
Dimitri Rotow |
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> Conversly for whoever is thrilled with their 24K SDTS DLG data
> please send
> me the name of a typical quad you are working with so I can see
> the results
> on my PC?
>
Take a look at
http://edcftp.cr.usgs.gov/pub/data/DLG/LARGE_SCALE/P/palo_alto_CA/transporta
tion/ and download the "RD" file. That's the Palo Alto quad (including the
Menlo Park USGS building) roads layer. Check the "Map fields between tables"
box on import to automatically build relations between the drawing's table
and various accessory tables.
If you want to see all fields, in your Tools - Options - Miscellaneous pane
check the "Import empty columns in tables" box. Many fields in the USGS
data sets are empty. Manifold gives you the option of not importing fields
that are empty.
Regarding:
>
> It looks like the key to all this is learning about master data
> dictionaries
> that are NOT included with the SDTS files. The DLG32 viewer
> loads the files
> but complaines about not having a master data dictionary.
I've taken a look at the Morro Bay South quad and have sent it to tech
support. The preliminary analysis on it is that this particular SDTS
fileset has a minor error in it, in that some fields described as fixed
length are not. We've imported that file with a few SDTS readers and some
can read it with complaints and some cannot read it at all.
Our feeling is that error is a trivial departure from the SDTS spec that
Manifold should be able to work around. Next week's update will extend
Manifold to deal with such minor inconsistancies.
Cheers,
Dimitri
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