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Date: Tue, 25 Sep 2001 13:52:45 -0700
From: John Creaser <[log in to unmask]>
Subject: Historic Topographic Maps of California
Sender: John Creaser <[log in to unmask]>


The Earth Sciences & Map Library of the University of California at
Berkeley is pleased to announce the release of a new online map resource
"Historic Topographic Maps of California." This Website provides access to
the U.S. Geological Survey's topographic quadrangles, both 15 and
7.5-minute, spanning more than 100 years of mapping (1885-1999). Initial
coverage is provided for the San Francisco Bay region. The area covered
extends from Pt. Reyes south to Half Moon Bay and east to Livermore and San
Jose. Historic topographic maps are invaluable for tracking changes in land
use, development of transportation systems, and growth of urban areas. 350
maps were carefully selected to represent a historic perspective of the
changing landscape of the region.

Thanks go to the U.S. Geological Survey National Mapping Division for
scanning our maps at very high resolution. Maps were digitized at 800 dpi,
24 bit color providing extremely large file sizes up to 1.3 GB per image.
MrSid compression (40:1) was used for the images presented on the Web.

UC-Berkeley developed tools for archival collections called Making of
America II were used for this project. Bibliographic, administrative,
image, and metadata were keyed into a relational database. XML encoded
digital objects were created from this database, stored in a repository,
then presented on the Web with the MOA II viewer. The MrSid viewer allows
users to zoom into each image.

We hope this site provides a useful resource to our users:

http://sunsite.berkeley.edu/histopo/

Please direct any questions about this project to either

John Creaser
[log in to unmask]

or

Katie Frohmberg
katie @library.berkeley.edu
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