Georectification of Historic Aerial
Photographs for Douglas County, KS
Mid-America GIS Consortium Conference 2006
Rhonda Houser, University of Kansas Libraries
…or matching
KU University Relations
Overview
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GIS/Data Services at KU Libraries
Project background
Project logistics
Uses of photos
Access to photos
Future work
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Anschutz Library:
Map Collection
GIS and Data Lab
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GIS and Data Lab
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finding downloading converting creating
acquiring editing manipulating running analyses
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11x17 and 24x36 inch scanners
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Training
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Introduction
• enhance existing image archive
• contribute to technical methodology
• add to supply of historical spatial data
• generate data for use with other spatial data
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Background
Scan
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Obtained air photos from 1930s to 1980s
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Converted print photo to image by
scanning
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Determined township, range and section
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Coarse adjustment… shift, rotate, etc.
Georeference
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Target image- unknown geographic coordinates
Reference image- known
geographic coordinates
Georeference
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Identify potential links between target…
Georeference
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… and reference image.
Georeference
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Create a link on target image
Georeference
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Create a matching link on reference image
Georeference
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Repeat process to identify matched points
Georeference
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Georeference
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Georeference
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Georeference
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Georectify
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Georectify
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Georectify
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Applications
land surveying and property valuation
historical land use
geography and remote sensing classes
ecological classification
wildlife habitat mapping
drought detection
geology and soil classification
transportation studies
archaeological/ anthropological sites
historic trails
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Online Image Archive
Air photos are available online:
www.lib.ku.edu/mapscoll/web/airindex.shtml
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Choose quadrant
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Choose area
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Choose year
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View or download image
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Project Status
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1937 set essentially done
1954 set half done
Develop template for online access
Incorporate other sets as finished
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KU Memorial Stadium 1937
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KU Memorial Stadium 1954
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KU Memorial Stadium 1966
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KU Memorial Stadium 1976
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Acknowledgements
Sources of data:
• Digital orthophoto, road data, and public
land survey system data
• Digital air photos
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Contributors
• Douglas County Public Works
• Various KU students, staff and faculty,
including Ben Hatfield, Julienne Emry and
Beth Davis
• This investigation was supported by the
University of Kansas General Research
Fund Allocation #23017831.
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QUESTIONS
Air Photo poster online:
http://maplibrary.esri.com/LibraryService/
DownloadedFiles/esri_poster.jpg
Rhonda Houser
785.864.1238
[email protected]
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Create Metadata
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GPS locations for sunflowers
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South Korea and Protests
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Russian election data
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Questions of distance, concentration, proximity…
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Data Output: desktop printers, 11x17 inch printer
and 36 inch wide color plotter
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12%
2% 5%
11%
Student (undergrad or grad)
Undergraduate
Graduate
21%
Faculty
Staff
49%
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Arch Eng, Art, Biol
Survey, Bureau Child
Research, Education,
French & Italian,
Germanic Lang, Policy
Research Inst, Public
Admin, Sociology
Non-KU
Geol Survey
Natural Hist Mus
Amer Studies
Urb Planning
Geography
Ecol and Evol Biol
Architecture
Poli Science
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Georectification of Historic Aerial Photographs for