Seismic-zonation of Port-au-Prince Using Pixel- and Object-based Imaging Analysis Methods on ASTER GDEM
Abstract
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.
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.Additional details
- Eprint ID
- 25463
- Resolver ID
- CaltechAUTHORS:20110928-090751542
- Development Office of Foreign Disaster Assistance (USAid-OFDA)
- Created
-
2011-09-28Created from EPrint's datestamp field
- Updated
-
2020-03-09Created from EPrint's last_modified field