Please try using the FGDC clearinghouse for Geologic Division maps at:
This is the main level. It currently includes titles for more than 390
digital data sets at various scales. Other data sets are in the hands of USGS
geologists who you will have to contact individually if the project is
ongoing. Probably every USGS geologic map that has ever published has been
digitized, it is just a matter of determining who has the data.
When I left the agency there were projects underway to produce digital
geologic maps at 1:100,000 and another to create one for North America and
adjacent areas. There is also a small scale geologic of the US on the
greenwood server in Denver office of the USGS that you can download through
Here is the URL for greenwood:
Download the King and Beikman data that Greg Green produced. If you must have
a 1:1,000,000 geologic map of the entire US, you are out of luck (as far as I
know). You can however mosaic published digital 1:100,000 maps and create
your own data set.
Other geologic products can be accessed from the Geologic Division including
the Quaternary Atlas of the eastern US, which should be available by now.
To do a search of the geology database go to:
and enter your requirements.
Once you locate the data that you want, review the metadata document and
ascertain the quality, date, format, etc.
If you have any problem, email the POC for the Geoscience Data Base.
Sorry that I couldn't help as much with topographic data and water data. They
exist. You may try calling your local USGS office, they are always there to
Michel van Best wrote:
> I looked at he USGS Site, but no succes. I found out you can order them on
> paper, but not download them. The 1:24000, 1:100000 and 1:250000 can be
> downloaded from teh IDS Depot.
> > -----Original Message-----
> > From: David Nealey [mailto:email@example.com]
> > Sent: vrijdag 21 juli 2000 15:52
> > To: Michel van Best
> > Cc: Maillist GIS (E-mail)
> > Subject: Re: GISList: 1:1000000 USGS maps
> > What kind of maps are you looking for? Geologic?
> > Topographic? Hydrologic?
> > Start with http://mapping.usgs.gov/ for topographic maps, etc.
> > Start with http://ngmdb.usgs.gov/ for geologic maps.
> > Michel van Best wrote:
> > > Hello,
> > >
> > > Does anyone were i can download USGS maps on a 1:1000000
> > scale (i'm refering
> > > to the USA maps).
> > >
> > > Regards,
> > >
> > > Michel
> > >
> > > To unsubscribe, write to firstname.lastname@example.org
> > >
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