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Site Characterization Using Integrated Imaging Analysis Methods on Satellite Data of the Islamabad, Pakistan, Region

Yong, Alan and Hough, Susan E. and Abrams, Michael J. and Cox, Helen M. and Wills, Christopher J. and Similia, Gerry W. (2008) Site Characterization Using Integrated Imaging Analysis Methods on Satellite Data of the Islamabad, Pakistan, Region. Bulletin of the Seismological Society of America, 98 (6). pp. 2679-2693. ISSN 0037-1106.

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We develop an integrated digital imaging analysis approach to produce a first-approximation site characterization map for Islamabad, Pakistan, based on remote-sensing data. We apply both pixel-based and object-oriented digital imaging analysis methods to characterize detailed (1:50,000) geomorphology and geology from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite imagery. We use stereo-correlated relative digital elevation models (rDEMs) derived from ASTER data, as well as spectra in the visible near-infrared (VNIR) to thermal infrared (TIR) domains. The resulting geomorphic units in the study area are classified as mountain (including the Margala Hills and the Khairi Murat Ridge), piedmont, and basin terrain units. The local geologic units are classified as limestone in the Margala Hills and the Khairi Murat Ridge and sandstone rock types for the piedmonts and basins. Shear-wave velocities for these units are assigned in ranges based on established correlations in California. These ranges include Vs30-values to be greater than 500 m/sec for mountain units, 200–600 m/sec for piedmont units, and less than 300 m/sec for basin units. While the resulting map provides the basis for incorporating site response in an assessment of seismic hazard for Islamabad, it also demonstrates the potential use of remote-sensing data for site characterization in regions where only limited conventional mapping has been done.

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Hough, Susan E.0000-0002-5980-2986
Additional Information:© 2008 Seismological Society of America. Manuscript received 6 February 2008. We greatly appreciate the helpful review comments by Robert S. Dollar, Karen R. Felzer, and Martin Chapman, in addition to early discussions with Kenneth W. Hudnut and Edward H. Field. We also greatly appreciate technical guidance from David Hulslander and Keith Nicholson of ITT Visual Information Solutions and Matthias Stolz and John Parker of Definiens AG. David Coss Y. Leon contributed to the preparation of the maps for publication. Work done by Michael J. Abrams was performed at the Jet Propulsion Laboratory/California Institute of Technology, under a contract to the National Aeronautics and Space Administration. We thank Linda Gundersen for partial support through the U.S. Geological Survey Working Capital Fund. Partial support was also provided by the California State University, Northridge (CSUN) CATALYST program, funded by National Science Foundation–Geoscience (Number NSF-GEO-0119936 [2001–2005] and Number 0503609 [2005–2009]).
Funding AgencyGrant Number
U.S. Geological SurveyUNSPECIFIED
California State University, NorthridgeUNSPECIFIED
National Science FoundationGEO-0119936
National Science FoundationGEO-0503609
Issue or Number:6
Record Number:CaltechAUTHORS:YONbssa08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12472
Deposited By: Archive Administrator
Deposited On:03 Dec 2008 22:53
Last Modified:09 Mar 2020 13:18

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