U.S. Flood Maps Based On Decades-Old Data
"Maps being used to calculate flood danger in the United States rely on data that are decades out of date, according to a report that calls for a new national program to remap land levels."
"The most immediate need is for the Federal Emergency Management Agency's flood-mapping program. Those maps are used by mortgage companies and FEMA's National Flood Insurance Program to determine whether property owners should be required to purchase flood insurance."