Elevation Data for Floodplain Mapping Book

Summary     1
Introduction     10
Creating Floodplain Maps     12
Origin of This Study     12
Statement of Task and Report Structure     13
Limitations of This Study     14
Flood Mapping     16
Flood Modeling     17
Flood Damage     20
Flood Mapping     21
Fema's Map Modernization Program     24
The FEMA Flood Insurance Rate Map     24
FEMA Engineering Study Types     28
Flood Insurance     33
FEMA's Map Inventory     37
FEMA's Processes and Procedures-1972 to 2002     38
FEMA's Processes and Procedures-2002 to 2006 Flood Map Modernization     39
Creation of FEMA's Five-Year Plan-MHIP     40
FEMA's Method for Risk Determination and Mapping Prioritization     41
FEMA Map Quality Standards     44
FEMA's Current Use of Elevation Data     45
Bathymetry     49
Models for Elevation Data     50
DEM Versus TIN Mapping     52
Hydro-enforced Streamlines     54
Chapter Summary     54
Femote Sensing Technologies for Floodplain Mapping     57
Concepts andTerms     57
Photogrammetry     63
Light Detection and Ranging     72
Interferometric Synthetic Aperture Radar     78
Chapter Summary     87
Assessment of Floodplain Mapping Technologies     89
Observations on FEMA's Map Modernization Program     89
Collection of Orthoimagery Base Maps     91
Collection of Digital Elevation Data     99
Chapter Summary     112
Conclusions and Recommendations     115
Adequacy of Base Map and Elevation Information     115
Available Mapping Technologies     117
Elevation for the Nation     119
References     121
Appendixes
Biographical Sketches of Committee Members and Staff     127
Workshop Agenda and Participants     132
Glossary     135
Acronyms     149