System and method for performing flood zone certifications

Details System and method for performing flood zone certifications System and method for performing flood zone certifications

2005-01-11

2005-01-11

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

C702S034000, C701S200000

Reexamination Certificate

active

06842698

ABSTRACT:
After FEMA flood maps are scanned and converted to raster maps on a computer system, they are georeferenced. The georeferenced raster maps are stored on the system. Map inset polygons are surrounded by a virtual bounding box and a determination is made whether each grid rectangle intersects any bounding box. For each such intersection, the relevant inset polygon is traced to determine if it actually intersects the grid rectangle. If there is such intersection, the inset polygon is added to a list attached to the grid rectangle. At the end of the process, the list for each grid rectangle identifies each inset polygon intersected thereby. When an address of a property subject to a flood zone determination is entered into the system and geocoded, the grid rectangle containing the address is immediately called up. If only one inset polygon is on the list, it is used to make the flood determination. If more than one inset polygon is on the list, the various polygons are examined to determine which one is appropriate for making the flood determination, which is then made.

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