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Geodatabase Design for FEMA Flood Hazard Studiesby William Shane Walker, M.S. and David R. Maidment, Ph.D. ABSTRACT As a part of its Map Modernization Program, the Federal Emergency Management Agency (FEMA) specifies in the Guidelines and Specifications for Flood Hazard Mapping Partners how Flood Hazard Mapping Partners will submit geographic information system (GIS) data through the Digital Flood Insurance Rate Map (DFIRM) database (specified in Appendix L) and the Data Capture Standards (DCS) database (specified in Appendix N). This thesis describes the design of a FEMA Flood Study Geodatabase (FSG) and involves: (1) merging the DFIRM database with the DCS database and removing overlapping tables; (2) converting the DFIRM/DCS relational database system into a Geodatabase (i.e., the FSG); (3) developing a correlation between the FSG and the Arc Hydro data model; (4) developing an XML version of the FSG schema; and (5) relating the flood hazard data to the National Hydrography Dataset (NHD). The critique and recommendations contained herein are offered with the intent to improve the utility of FEMA’s multi-billion dollar investment in flood hazard data. The highlighted links that follow are connected to Adobe pdf files of the corresponding material. To view them you must have the Adobe Acrobat Reader 3.0. View the Report...(6333 KB)
These materials may be used for study, research, and education, but please credit the authors and the Center for Research in Water Resources, The University of Texas at Austin. All commercial rights reserved. Copyright 2002 Center for Research in Water Resources. |
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