Refinement of a method for identifying probable archaeological sites from remotely sensed data

James C. Tilton; Douglas C. Comer; Carey E. Priebe; Daniel Sussman; Li Chen

doi:10.1117/12.918366

24 May 2012 Refinement of a method for identifying probable archaeological sites from remotely sensed data

James C. Tilton, Douglas C. Comer, Carey E. Priebe, Daniel Sussman, Li Chen

Proceedings Volume 8390, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XVIII; 83901K (2012) https://doi.org/10.1117/12.918366
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

To facilitate locating archaeological sites before they are compromised or destroyed, we are developing approaches for generating maps of probable archaeological sites, through detecting subtle anomalies in vegetative cover, soil chemistry, and soil moisture by analyzing remotely sensed data from multiple sources. We previously reported some success in this eort with a statistical analysis of slope, radar, and Ikonos data (including tasseled cap and NDVI transforms) with Student's t-test. We report here on new developments in our work, performing an analysis of 8-band multispectral Worldview-2 data. The Worldview-2 analysis begins by computing medians and median absolute deviations for the pixels in various annuli around each site of interest on the 28 band dierence ratios. We then use principle components analysis followed by linear discriminant analysis to train a classier which assigns a posterior probability that a location is an archaeological site. We tested the procedure using leave-one-out cross validation with a second leave-one-out step to choose parameters on a 9,859x23,000 subset of the WorldView-2 data over the western portion of Ft. Irwin, CA, USA. We used 100 known non-sites and trained one classier for lithic sites (n=33) and one classier for habitation sites (n=16). We then analyzed convex combinations of scores from the Archaeological Predictive Model (APM) and our scores. We found that that the combined scores had a higher area under the ROC curve than either individual method, indicating that including WorldView-2 data in analysis improved the predictive power of the provided APM.

Citation Download Citation

James C. Tilton, Douglas C. Comer, Carey E. Priebe, Daniel Sussman, and Li Chen "Refinement of a method for identifying probable archaeological sites from remotely sensed data", Proc. SPIE 8390, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XVIII, 83901K (24 May 2012); https://doi.org/10.1117/12.918366

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