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Subject: RE: MAPS-L: done any scanning of USGS-produced topographic maps
of California? please let us know
Date: Tue, 12 Jul 2005
From: "Linda P Newman" <[log in to unmask]>
To: "Maps, Air Photo & Geospatial Systems Forum" <[log in to unmask]>
Mary, --thought I reported this some time back, but, if not--
Much of the text below comes from the site:
http://keck.library.unr.edu/data/historic_topos/hist-topos-project-description.html
Linda
-----Original Message-----
From: Maps, Air Photo & Geospatial Systems Forum
[mailto:[log in to unmask]] On Behalf Of Angie Cope, AGSL
Sent: Tuesday, July 12, 2005 5:50 AM
To: [log in to unmask]
Subject: MAPS-L: done any scanning of USGS-produced topographic maps of
California? please let us know
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MAPS-L ** MAPS-L ** MAPS-L ** MAPS-L ** MAPS-L
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Subject: done any scanning of USGS-produced topographic maps of
California? please let us know
Date: Tues, 12 Jul 2005 11:01:04 -0700
From: Mary Larsgaard
Reply-To: [log in to unmask]
Organization: UCSB Map & Imagery Lab, Library
To: Maps and Air Photo Systems Forum
<>California Topographic Map Scanning Project Survey
Numerous initiatives across the state of California are underway to
digitize and provide access to the United States Geological Survey
topographic maps of California. As these scanning efforts are
expensive, time intensive, and complicated, it makes sense to pool our
efforts in order to minimize redundant efforts. Librarians from the
University of California, California State Universities, and Stanford
University, in conjunction with the United States Geological Survey
(USGS) and other interested parties, have begun to explore the
possibility of working together to create a complete set of scanned
topographic maps of the state to be made available to the public and to
be part of the public domain. This survey is part of that project. For
the time period July 1-December 31, 2005, I am chairing this group.
Links to scanned maps of the states are available from a number of
sources around the state. This list can be accessed at:
http://www.sdc.ucsb.edu/holdings/caltopo.html.
If you have done any scanning of these maps, or you know of someone who
has,please fill out this survey and send to me at [log in to unmask]
Thanks.
-----
Name/Title_Linda Newman, Geoscience & Map Librarian
Institution_University of Nevada, Reno
______________________________________________________________
Contact Information__775/ 784-6945 ext. 230
[log in to unmask]
1. Have you scanned any California USGS topographic maps (any scale,
any edition)? Yes
2. What is the scope of your project? Primarily NV but any
bordering NV > `historic' topos as identified in Moffat and Stark
3. Are the scans publicly available? Yes
http://keck.library.unr.edu/data/historic_topos/historic_topos-indexpage
.html
4. Is there metadata associated with each scan? Yes
5. What are the technical parameters of your project (file formats,
dpi, color compression, etc.)? offered in tiff, jpeg, djvu
Project description:...
The uncompressed TIFF files were derived from a high-resolution
(300 dpi, 24-bit) scan from the original using an Ideal Magnum Wide
Format FSCX050 scanner, default color configuration. Map image file
sizes ranged from 40 MB to 230 MB each and were saved as uncompressed
tiff files. For the web, presentation images were converted to
LizardTech's DjVu format at a compression ratio of up to 220:1. The JPEG
files were derived from the TIFF file. The DjVu files were derived from
the TIFF at a compression rate of up to 220:1 using LizardTech's DjVu
compression software. The DjVu online viewer allows users to zoom into
each image at ever increasing resolutions. All these files are loaded on
the UNR Libraries' NAS server.
The UNR Libraries use DiMeMa's CONTENTdm digital projects management
software to manage and provide public access to its images and metadata.
6. What type of scanner are you using?
Early in 2004 with financial assistance from the Mary Ansari
Endowment, the library acquired an IDEAL/Contex Magnum XL 54" Plus Color
Scanner . It scans at 24 bit color, up to 2400 dpi and will scan media
up to 0.6 inches thick and up to 54 inches wide. The scanner was
manufactured in Denmark and distributed in the U.S. by Ideal Scanners &
Systems. This scanner is now the primary equipment for this project.
7. Where are the images being held and are they being archived?
Library servers, UNR
8. Would you be interested in participating in an initiative to
collectively scan, provide access, and archive a complete set of
California topographic maps? Probably not a complete set; will
put this to the Digital Projects Librarian
9. Do you know of any topographic map scanning projects currently in
the works? --seems like `everybody' is doing it for their area--
<>Thank you for filling out the survey.
Mary Lynette Larsgaard
Assistant Head, Map and Imagery Laboratory
Fund Manager: Geography
Co-Manager for Map and Imagery Laboratory Fund
Davidson Library
University of California
Santa Barbara CA 93106-9010
USA
805/893-4049
fax 805/893-8799
[log in to unmask]
<>
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