Modern Technology for Ancient Analysis: LiDAR at Aztalan State Park<br />By Colleen A. Hermans<br />Image by Randy Roberts...
Overview<br />Why is Aztalan important?<br />LiDAR specs for the area<br />Examples and comparisons of images<br />Benefit...
Aztalan: 1000 – 1200 AD,Middle Mississippian Village<br />Cahokia: Cultural Center from 700 – 1400 AD; peak 1050-1200 AD<b...
Jefferson County<br />Aztalan<br />
LiDAR data and specs used<br />LiDAR flown over north half of Jefferson County in 2004 by Merrick and Company<br />Product...
Contours derived from using a transit station<br />Time intensive	<br />1 week, all day<br />Need to be nearby in order to...
2’ Contour map of Aztalan<br />Previous transit station contour area<br />
Aztalan<br />2X vertical<br />1. Northwest Mound: built in 3 stages<br />2. Southwest Mound:<br />    largest mound<br />3...
?<br />
Southwest platform<br />Northwest platform mound<br />N<br />Image from the Wisconsin Historical Society<br />Southwest pl...
2008 NAIP<br />
DOP vs. LiDAR: Conical Mounds<br />
Conical Cross Sections<br />
N<br />Conical Mounds<br />Image from the Wisconsin Historical Society<br />
East Bank<br />Erosion<br />pothole<br />
East Bank Cross Section Data<br />
DOP vs. LiDAR<br />LiDAR advantage: Penetrates foliage<br />2008 NAIP<br />
Benefits of LiDAR<br />Monitor/preserve known existing sites over a large terrain (that can be difficult to navigate)<br /...
Example of better LiDAR<br />Another Example: Effigy Mound National Monument by Continental Mapping; <br />found new mound...
Future of LiDAR and Archaeology<br />Sharing of data across professions and agencies<br />Statewide data!<br />CGI of Azta...
Image courtesy of Friends of Aztalan<br />
Questions?<br />Colleen.Hermans@wisconsin.gov<br />Image by Daniel Seurer<br />
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Modern Technology for Ancient Analysis

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Modern Technology for Ancient Analysis

  1. 1. Modern Technology for Ancient Analysis: LiDAR at Aztalan State Park<br />By Colleen A. Hermans<br />Image by Randy Roberts<br />
  2. 2. Overview<br />Why is Aztalan important?<br />LiDAR specs for the area<br />Examples and comparisons of images<br />Benefits of using <br /> LiDAR for archaeology<br />Looking towards the future<br />Platform Mound and Palisade Wall<br />Image from the Wisconsin Historical Society<br />
  3. 3. Aztalan: 1000 – 1200 AD,Middle Mississippian Village<br />Cahokia: Cultural Center from 700 – 1400 AD; peak 1050-1200 AD<br />Image from www.legendsofamerica.com<br />
  4. 4. Jefferson County<br />Aztalan<br />
  5. 5. LiDAR data and specs used<br />LiDAR flown over north half of Jefferson County in 2004 by Merrick and Company<br />Products derived: 2’ contours, DTM, Ortho, planimetrics<br />TINs created from the 2’ contours used by our floodplain program <br />Ann Runyard from DNR extracted the nodes and created a seamless TIN from 2 overlapping TINs <br />Mark Dudzik, DNR archaeologist, consulted<br />
  6. 6. Contours derived from using a transit station<br />Time intensive <br />1 week, all day<br />Need to be nearby in order to survey on foot<br />Image courtesy of Mark Dudzik, DNR<br />
  7. 7. 2’ Contour map of Aztalan<br />Previous transit station contour area<br />
  8. 8. Aztalan<br />2X vertical<br />1. Northwest Mound: built in 3 stages<br />2. Southwest Mound:<br /> largest mound<br />3. Natural gravel knoll<br />4. Remnant mound<br />5. Row of Conical Mounds<br />5<br />1<br />4?<br />2<br />3<br />
  9. 9. ?<br />
  10. 10. Southwest platform<br />Northwest platform mound<br />N<br />Image from the Wisconsin Historical Society<br />Southwest platform mound through stockade<br />N<br />Image from the Wisconsin Historical Society<br />Image from the University of Wisconsin-Milwaukee, Department of Anthropology<br />
  11. 11. 2008 NAIP<br />
  12. 12. DOP vs. LiDAR: Conical Mounds<br />
  13. 13. Conical Cross Sections<br />
  14. 14. N<br />Conical Mounds<br />Image from the Wisconsin Historical Society<br />
  15. 15. East Bank<br />Erosion<br />pothole<br />
  16. 16. East Bank Cross Section Data<br />
  17. 17. DOP vs. LiDAR<br />LiDAR advantage: Penetrates foliage<br />2008 NAIP<br />
  18. 18. Benefits of LiDAR<br />Monitor/preserve known existing sites over a large terrain (that can be difficult to navigate)<br />Discover new sites<br />Depending on the LiDAR density, can be very accurate<br />Contour lines – more time efficient than using a total station<br />LiDAR is to mound sites as aerial imagery is to Nazca lines in Peru<br />
  19. 19. Example of better LiDAR<br />Another Example: Effigy Mound National Monument by Continental Mapping; <br />found new mound; 15 cm vertical accuracy<br />Image from New York Times, courtesy of Caracol Archaeological Project<br />
  20. 20. Future of LiDAR and Archaeology<br />Sharing of data across professions and agencies<br />Statewide data!<br />CGI of Aztalan<br />Create 3D mound depictions similar to creating buildings in cities<br />
  21. 21. Image courtesy of Friends of Aztalan<br />
  22. 22. Questions?<br />Colleen.Hermans@wisconsin.gov<br />Image by Daniel Seurer<br />

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