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FEMA Digital Q3 Flood Data
Entry ID: FEMA_Digital_Q3

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Abstract: Digital Q3 Flood Data are developed by scanning the existing FIRM hardcopy,
vectorizing a thematic overlay of flood risks. Vector Q3 Flood Data files
contain only certain features from the existing FIRM hardcopy. Q3 vector data
are contained in one single countywide file, including all incorporated and
unincorporated areas of a county.

Digital Q3 Flood Data do ... View entire text
Related URL
Description: Metadata on United States Flood Risk Zones (GIS Coverage) from ESRI, which is
derived from this FEMA Digital Q3 Flood Data.
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Geographic Coverage
Spatial coordinates   
  N: 72.0   S: 15.0   E: -60.0   W: -163.0

Data Set Citation
Dataset Originator/Creator: FEMA
Dataset Title: FEMA Digital Q3 Flood Data
Dataset Release Place: Washington, DC
Dataset Publisher: FEMA
Data Presentation Form: Vector Maps
Online Resource:
MAPS Ancillary Description
Quality Edge-matching errors, overlaps and underlaps in coverage, and similar problems
are not corrected during digitizing or scanning and vectorizing the Q3 Flood
Data. Although FEMA has established no independent quality control/quality
assurance program for the Q3 Flood Data, the Q3 Flood Data files are
distributed only after they have passed checking routines contained in FEMA's
Q3QA Checking Software. The data are accompanied by documentation showing that
the files have been evaluated and passed. FEMA has established a User Support
mechanism through which any problems found with the data can be identified and
channeled back to FEMA for resolution.
Data Set Progress
Originating Center
Data Center
Map Service Center, FEMA, U.S. Department of Homeland Security Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 800-358-9616
Fax: 800-358-9620
Email: mscservice at
Contact Address:
Map Service Center
P.O. Box 1038
City: Jessup
Province or State: Maryland
Postal Code: 20794-1038
Country: USA
Distribution Media: CD-ROM
Distribution Format: Digital Line Graph, Arc/Info, MapInfo
Fees: $50 per CD-ROM
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2003-06-10
Last DIF Revision Date: 2017-08-23