Physical Data Gathering ◾ 307
© 2011 by Taylor & Francis Group, LLC
◾ e Multi-Hazard Mapping Initiative—is site generates an online map
from a network of hazard- and base-map suppliers. Hazards that can be plot-
ted on the map include ood data, earthquakes, hurricanes, tornadoes, and
many other hazards (www.HazardMaps.gov).
◾ ESRI Online Hazard Map—is site generates an online hazard map from
existing ood insurance rate maps (FIRM). is data is approximate and
should be ne for a risk assessment, but it is not a legal document sucient for
determining insurance rates (www.esri.com/hazards/makemap.html).
◾ National Atlas of the United States—is site generates maps of natural
hazards such as oods, earthquakes, lightning, and