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Seismic-zonation of Port-au-Prince Using Pixel- and Object-based Imaging Analysis Methods on ASTER GDEM

Yong, Alan and Hough, Susan E. and Cox, Brady R. and Rathje, Ellen M. and Bachhuber, Jeff and Dulberg, Ranon and Hulslander, David and Christiansen, Lisa and Abrams, Michael J. (2011) Seismic-zonation of Port-au-Prince Using Pixel- and Object-based Imaging Analysis Methods on ASTER GDEM. Photogrammetric Engineering and Remote Sensing, 77 (9). pp. 909-921. ISSN 0099-1112.

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We report about a preliminary study to evaluate the use of semi-automated imaging analysis of remotely-sensed DEM and field geophysical measurements to develop a seismic-zonation map of Port-au-Prince, Haiti. For in situ data, V .30 values are derived from the MASW technique deployed in and around the city. For satellite imagery, we use an ASTER GDEM of Hispaniola. We apply both pixel- and object-based imaging methods on the ASTER GDEM to explore local topography (absolute elevation values) and classify terrain types such as mountains, alluvial fans and basins/near-shore regions. We assign NEHRP seismic site class ranges based on available V .30 values. A comparison of results from imagery-based methods to results from traditional geologic-based approaches reveals good overall correspondence. We conclude that image analysis of RS data provides reliable first-order site characterization results in the absence of local data and can be useful to refine detailed site maps with sparse local data.

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Hough, Susan E.0000-0002-5980-2986
Additional Information:© 2011 American Society for Photogrammetry and Remote Sensing. We thank the US Agency for International Development Office of Foreign Disaster Assistance (USAid-OFDA) for their partial support. 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. ASTER GDEM is a product of the Japan Ministry of Economy, Trade and Industry and the United States National Aeronautics and Space Administration. We are grateful for the beneficial remarks from USGS reviewers Robert S. Dollar and Sinan Akciz, in addition to insightful comments by three anonymous journal referees.
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Development Office of Foreign Disaster Assistance (USAid-OFDA)UNSPECIFIED
Issue or Number:9
Record Number:CaltechAUTHORS:20110928-090751542
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25463
Deposited By: Ruth Sustaita
Deposited On:28 Sep 2011 17:16
Last Modified:09 Mar 2020 13:18

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