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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. GIS/Data Services at KU Libraries Project background Project logistics

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  1. Georectification of Historic Aerial Photographs for Douglas County, KSMid-America GIS Consortium Conference 2006Rhonda Houser, University of Kansas Libraries …or matching KU University Relations

  2. Overview • GIS/Data Services at KU Libraries • Project background • Project logistics • Uses of photos • Access to photos • Future work

  3. Anschutz Library: Map Collection GIS and Data Lab

  4. GIS and Data Lab

  5. findingdownloading converting creating acquiring editing manipulating running analyses

  6. 11x17 and 24x36 inch scanners

  7. Training

  8. Introduction • enhance existing image archive • contribute to technical methodology • add to supply of historical spatial data • generate data for use with other spatial data

  9. Background Scan • Obtained air photos from 1930s to 1980s • Converted print photo to image by scanning • Determined township, range and section

  10. Coarse adjustment… shift, rotate, etc. Georeference

  11. Target image- unknown geographic coordinates Reference image- known geographic coordinates Georeference

  12. Identify potential links between target… Georeference

  13. … and reference image. Georeference

  14. Create a link on target image Georeference

  15. Create a matching link on reference image Georeference

  16. Repeat process to identify matched points Georeference

  17. Georeference

  18. Georeference

  19. Georeference

  20. Georectify

  21. Georectify

  22. Georectify

  23. 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

  24. Online Image Archive Air photos are available online: www.lib.ku.edu/mapscoll/web/airindex.shtml

  25. Choose quadrant

  26. Choose area

  27. Choose year

  28. View or download image

  29. Project Status • 1937 set essentially done • 1954 set half done • Develop template for online access • Incorporate other sets as finished

  30. KU Memorial Stadium 1937

  31. KU Memorial Stadium 1954

  32. KU Memorial Stadium 1966

  33. KU Memorial Stadium 1976

  34. Acknowledgements Sources of data: • Digital orthophoto, road data, and public land survey system data • Digital air photos

  35. 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.

  36. Q U E S T I O N S Air Photo poster online:http://maplibrary.esri.com/LibraryService/DownloadedFiles/esri_poster.jpgRhonda Houser 785.864.1238data@ku.edu

  37. Create Metadata

  38. GPS locations for sunflowers

  39. South Korea and Protests

  40. Russian election data

  41. Questions of distance, concentration, proximity…

  42. Data Output: desktop printers, 11x17 inch printer and 36 inch wide color plotter

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