1. …or matching Georectification of Historic Aerial Photographs for Douglas County, Kansas ESRI Education Users Conference 2004 Rhonda Houser, University of Kansas

2. Air Photo Project, ESRI Education Users Conference 2004 2 Introduction enhance existing image archive contribute to technical methodology add to supply of historical spatial data create data that can be used with other spatial data

3. Air Photo Project, ESRI Education Users Conference 2004 3 Background Scan Use air photos from 1930s to 1980s Convert print photo to image by scanning Determine township, range and section

4. Air Photo Project, ESRI Education Users Conference 2004 4 Target image- unknown geographic coordinates Georeference Reference image- known geographic coordinates

5. Air Photo Project, ESRI Education Users Conference 2004 5 Coarse adjustment… shift, rotate, etc. Georeference

6. Air Photo Project, ESRI Education Users Conference 2004 6 Identify potential links between target… Georeference

7. Air Photo Project, ESRI Education Users Conference 2004 7 … and reference image. Georeference

8. Air Photo Project, ESRI Education Users Conference 2004 8 Create a link on target image Georeference

9. Air Photo Project, ESRI Education Users Conference 2004 9 Create a matching link on reference image Georeference

10. Air Photo Project, ESRI Education Users Conference 2004 10 Repeat process to identify matched points Georeference

11. Air Photo Project, ESRI Education Users Conference 2004 11 Georeference

12. Air Photo Project, ESRI Education Users Conference 2004 12 Georeference

13. Air Photo Project, ESRI Education Users Conference 2004 13 Georeference

14. Air Photo Project, ESRI Education Users Conference 2004 14 Georectify

15. Air Photo Project, ESRI Education Users Conference 2004 15 Georectify

16. Air Photo Project, ESRI Education Users Conference 2004 16 Georectify

17. Air Photo Project, ESRI Education Users Conference 2004 17 Create Metadata

18. Air Photo Project, ESRI Education Users Conference 2004 18 Online Image Archive Air photos are available online: www2.lib.ku.edu/mapscoll/web/airindex.htm

19. Air Photo Project, ESRI Education Users Conference 2004 19 Choose quadrant

20. Air Photo Project, ESRI Education Users Conference 2004 20 Choose area

21. Air Photo Project, ESRI Education Users Conference 2004 21 Choose year

22. Air Photo Project, ESRI Education Users Conference 2004 22 View or download image

23. Air Photo Project, ESRI Education Users Conference 2004 23 Applications land surveying and property valuation geography and remote sensing classes ecological classification wildlife habitat mapping drought detection geology and soil classification transportation studies archaeological/ anthropological sites historic trails

24. Air Photo Project, ESRI Education Users Conference 2004 24 KU Memorial Stadium 1937

25. Air Photo Project, ESRI Education Users Conference 2004 25 KU Memorial Stadium 1954

26. Air Photo Project, ESRI Education Users Conference 2004 26 KU Memorial Stadium 1966

27. Air Photo Project, ESRI Education Users Conference 2004 27 KU Memorial Stadium 1976

28. Air Photo Project, ESRI Education Users Conference 2004 28 Acknowledgements Sources of data: Street data Digital orthophoto, county boundary and road data, public land survey system data Digital air photo files

29. Air Photo Project, ESRI Education Users Conference 2004 29 Acknowledgements Contributors: Douglas County Public Works Ben Hatfield and Julienne Emry Various KU students, staff and faculty This investigation was supported by the University of Kansas General Research Fund Allocation #23017831.