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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
2004. The American Association of Petroleum Geologists. All rights reserved.
Remote surface mapping using orthophotos and geologic maps draped over digital elevation models: Application to the Sheep Mountain anticline, Wyoming
Subhotosh Banerjee 1 and Shankar Mitra2
1School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma 73019
2School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma 73019; [email protected]
AUTHORS
Subhotosh Banerjee received his B.Sc. and M.Sc. degrees from Calcutta University and his M.S. degree in geology from the University of Oklahoma (2002). He is currently working toward a Ph.D. in structural geology at the University of Oklahoma. His research interests are in surface and subsurface structural analysis and the application of remote sensing and geographic information systems to structural geology.
Shankar Mitra holds the Monnett Chair and Professorship of Energy Resources at the University of Oklahoma. He received his Ph.D. degree from Johns Hopkins University in 1976. His primary research interests are in surface and subsurface structural analysis.
ACKNOWLEDGMENTS
The authors thank AAPG reviewers Zeev Berger, Sandro Serra, and Kathy Hanks and editor John Lorenz for their reviews of the manuscript and for their comments and suggestions. We also acknowledge a fellowship from Phillips Petroleum (now Conoco-Phillips) to support Subhotosh Banerjee.
ABSTRACT
Remote mapping of surface structures can be conducted by draping digital orthophotos and geologic maps over digital elevation models in geographic information systems. Formational contacts can be mapped by viewing the intersections of these contacts with the topography on a true-to-scale, three-dimensional image. Bedding orientations can be determined from (1) the trends and slopes of dip slopes or (2) best fit planes to multiple points of intersection of a bedding surface with the topography. The methods are tested against mapped formation contacts and bedding attitudes for the Sheep Mountain anticline in the Bighorn basin, Wyoming. Detailed mapping of formation contacts is improved by careful observations of the contacts on three-dimensional images. Interpreted bedding attitudes from slope and multiple-point solutions show strong positive correlations with field measurements. This mapping method provides an efficient and accurate alternative to stereoscopic mapping using aerial photographs and satellite images, particularly for remote and inaccessible areas.
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