tailieunhanh - Elevation Data For Floodplain Mapping

This program encourages communities to regulate the land development in their floodplains to avoid flood damages and, in return, allows property owners located in flood hazard areas to purchase federal flood insurance. This insurance is designed to provide an alternative to federal disaster assistance to reduce the costs of repairing damage to buildings and their contents caused | Elevation Data for Floodplain Mapping Free Executive Summary http catalog Free Executive Summary Elevation Data for Floodplain Mapping Committee on Floodplain Mapping Technologies National Research Council ISBN 978-0-309-10409-8 168 pages 7 x 10 paperback 2007 This free executive summary is provided by the National Academies as part of our mission to educate the world on issues of science engineering and health. If you are interested in reading the full book please visit us online at http catalog . You may browse and search the full authoritative version for free you may also purchase a print or electronic version of the book. If you have questions or just want more information about the books published by the National Academies Press please contact our customer service department toll-free at 888-624-8373. Floodplain maps serve as the basis for determining whether homes or buildings require flood insurance under the National Flood Insurance Program run by the Federal Emergency Management Agency FEMA . Approximately 650 billion in insured assets are now covered under the program. Under a funded mandate from Congress FEMA is modernizing floodplain maps to better serve the program. However concerns have been raised to Congress as to the adequacy of the base map information available to support floodplain map modernization. The National Research Council initiated this study to advise Congress and the nation on this issue. The report concludes that there is sufficient two-dimensional base map imagery available from digital orthophotos aerial and satellite photographs similar to those viewed on Google Earth to meet FEMAÂ s flood map modernization goals. However the three-dimensional base elevation data that are needed to determine whether a building should have flood insurance are not adequate. FEMA needs land surface elevation data that are about ten times more accurate than data currently available for most of the nation.