Historical Digital Map Historical Digital Map CollectionCollection

Eric ArnoldEric ArnoldInformation Science 565Information Science 565

April 26, 2004April 26, 2004

USGS Topographic USGS Topographic QuadranglesQuadrangles

►57,000 1:24,000 scale maps to represent 57,000 1:24,000 scale maps to represent the 48 conterminous states and Hawaii.the 48 conterminous states and Hawaii.

►Most of these maps have been revised, Most of these maps have been revised, updated, or remapped over the years.updated, or remapped over the years.

►Paper maps are often stored under less Paper maps are often stored under less than ideal preservation conditions.than ideal preservation conditions.

►The USGS will cease producing most The USGS will cease producing most paper maps in favor of digital products.paper maps in favor of digital products.

Digital Map Web SitesDigital Map Web Sites►Maptech MapServerMaptech MapServer►TerraServer USATerraServer USA►TopoZoneTopoZone

►American Memory Map Collections: 15American Memory Map Collections: 1500-200400-2004

►David David RumseyRumsey Map Collection Map Collection►Perry-Castaneda Library Map CollectioPerry-Castaneda Library Map Collectio

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USGS Digital Raster GraphicsUSGS Digital Raster Graphics

PurposePurpose►To create a digital library of To create a digital library of

topographic topographic maps that will explore how historic maps that will explore how historic changes changes between map editions can be between map editions can be meaningfully meaningfully presented to the user.presented to the user.

AudienceAudience►HistoriansHistorians►GenealogistsGenealogists►EnvironmentalistsEnvironmentalists►People with a personal interest in the People with a personal interest in the

history of a regionhistory of a region

Collection GuidelinesCollection Guidelines► Ideally, all editions of every USGS Ideally, all editions of every USGS

topographic map would exist digitally.topographic map would exist digitally.

►For this project a few maps showing For this project a few maps showing significant change between editions significant change between editions were selected.were selected.

CopyrightCopyright►USGS-authored or produced data andUSGS-authored or produced data and

information are in the public domain.information are in the public domain.

Source: Source: http://www.usgs.gov/privacy.html#copyrighthttp://www.usgs.gov/privacy.html#copyright

DigitizationDigitization►250 dots-per-inch TIFF files250 dots-per-inch TIFF files

►36” large-format, color sheet feed 36” large-format, color sheet feed scanner scanner

►Area of interest cropped in Photoshop Area of interest cropped in Photoshop

►Saved in JPEG format and included in Saved in JPEG format and included in HTML fileHTML file

MetadataMetadata►Federal Geographic Data Committee Federal Geographic Data Committee

Metadata Metadata

►Dublin Core Dublin Core

►CrosswalksCrosswalks

Geospatial MetadataGeospatial Metadata►Coverage.WestBoundingCoordinate -84.310Coverage.WestBoundingCoordinate -84.310

►Coverage.EastBoundingCoordinate -84.250Coverage.EastBoundingCoordinate -84.250

►Coverage.NorthBoundingCoordinate 35.952Coverage.NorthBoundingCoordinate 35.952

►Coverage.SouthBoundingCoordinate 35.875Coverage.SouthBoundingCoordinate 35.875

Project LinksProject Links► http://web.utk.edu/~arnold/dam.htmhttp://web.utk.edu/~arnold/dam.htm

► http://web.utk.edu/~arnold/lab.htmhttp://web.utk.edu/~arnold/lab.htm

► http://web.utk.edu/~arnold/farragut.htmhttp://web.utk.edu/~arnold/farragut.htm

Delorme 3-D TopoQuads Delorme 3-D TopoQuads InterfaceInterface

Lessons LearnedLessons Learned►Manage time wiselyManage time wisely

►Know the capabilities of the softwareKnow the capabilities of the software

►Learn from shortcomingsLearn from shortcomings

►Be Prepared with low-tech workaround Be Prepared with low-tech workaround for demonstration purposesfor demonstration purposes