DIGITAL PROJECTS AND GIS

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DIGITAL PROJECTS AND GIS by Stephanie C. Haas,
Joe Aufmuth, and Mark Sullivan University of
Florida Libraries
http//www.uflib.ufl.edu/digital/collections/FLAP/
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Between 1937 and 1970, the U.S. Department of
Agriculture created more than 88,000 black and
white, 9 x 9 aerial photographs with 2,200
accompanying photomosaic indexes of Florida.
County codeFlight no. Tile no.
Flight date
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Originally intended to assist farmers determine
accurate assessments for their farms and to
provide information on crop determination and
soil conservation, today these images provide
some of the oldest land use/cover information
available. They are used extensively in
agriculture, conservation, urbanization,
recreation, education, hydrology, geology, land
use, ecology, geography, and history.
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In 2002, the Digital Library Center at UF
received an LSTA grant to digitize the aerial
tiles from 1937 to 1952 and make them available
through a map server. A renewal grant in 2003
permitted the digitization of the aerials through
1970.
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Objectives

• Scan 80,000 Air Photo Tiles 2,200 indexes
• Geographically Reference Index Sheets
• Create Spatial Index Data Base Linked to
  Individual Air Photo Tiles
• Deliver Spatial Index and Photos via the Internet

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A Collaborative Effort

• Map and Imagery Library
• Digital Library Center (DLC)
• Government Documents
• Library Systems
• Florida Center for Library Automation
• (FCLA)-stores MrSID images
• Geomatics Program (Civil Engineering)

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WORKFLOW
Original Tiffs Archived
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LARGE FORMAT CAMERA CAPTURED THE PHOTOMOSAIC
INDEXES
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Aerial tiles were scanned on flatbed scanners
Erasing crayon markings that were unanticipated
added up to 2 min/tilein preparation time Cost
added an additional6,000 to scanning labor.
(Not much funeither!)
Microteck 1800XL flatbed scanners 10-12
Tiles/hr 80,000 Tiles 615 DPI Greyscale 8bit
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DEALING WITH 88,000 aerials
Mark Sullivan, a student programmer with the DLC,
created two programs that became critical to the
projects success. The first tracked tiles
through the digitization chain 1) recorded date
received, 2) student assigned, 3) completion of
scan-including scanner used and time scanned,
and 4) CD number holding TIFF image.
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• The second tool
• Automated image collection from disparate
• scanning locations,
• Performed basic image manipulation for
  quality control,
• Created MrSID compressed image for serving, and
• 4) Stored data in the database.

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CREATING the GIS INTERFACE
STAFFING 6 Geomatics StudentsSummer
Cooperative Program Minimal Experience
SOFTWARE USEDLeicas Erdas Imagine Image
Clean Up Adobe Photoshop Image Clean Up ESRIs
ArcGIS University Site License Workstation
Georeferencing/Rectification ArcMap
Georeferencing QA/QC ArcIMS Internet Map
Server Geomatics Coordinate Transformation Program
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• HARDWARE
• 2 Designated Dell Precision 350 Workstations
• 3 Additional Library Computers
• 460 GB storage
• 3 DVD drives
• 1 5GB tape drive

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Aerial Index Sheets Photo Tile Mosaic for
Alachua County, FL
Legend and Sheet Index
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Scanned photomosaics index sheets were
geographically rectified
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ANCILLARY LAYERS USED TO RECTIFY THE INDEXES
67 Counties 3 Meter DOQs Roads Rivers Lakes TRS Co
unty Boundary
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Image Processing and GIS Data
Ground Control Layer
Sheet
DOQQ
Real World
Pixel
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Tieing Together County Indexes
Sheet 1
Sheet 2
Pixel
Pixel
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Individual aerials were linked by matching the
flight text string (upper right corner) with the
text string on the rectified indexes.
Index
Individual aerial tile
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Aerial Tile Layer and associated database
Each aerial dot represents a searchable record
in the layers database.
Tile records have 9 fields.
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Map interface to the aerial photos
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LAYERS AVAILABLE with associated symbols
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BASIC SEARCH
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ADVANCED SEARCH
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EXAMPLE
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Results
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Zoom to results
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Two quick comments Even though the individual
aerial tiles were not rectified.The resolution
is sufficient for use in some GIS projectsand
several thousand have been FTPd to agencies
andcompanies. Because the map interface uses
GIS tools, we developedseveral guides on how to
use the collection. These guides are available
off the top level page.
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