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1:6000 Scale (6K) Quadrangles developed by USEPA to Support Reconnaissance, and Tactical and Strategic Planning for Emergency Responses and Homeland Security Events (Region 1 Extract)

Published by U.S. EPA Office of Land and Emergency Management (OLEM) - Office of Emergency Management (OEM) | U.S. Environmental Protection Agency | Catalog Last Checked: August 03, 2026 at 04:46 AM | Dataset Last Updated: January 04, 2006 at 12:00 AM
Reference quads for emergency response reconnaissance developed for use by the US Environmental Protection Agency. Grid cells are based on densification of the USGS Quarterquad (1:12,000 scale or 12K) grids for the continental United States, Alaska, Hawaii and Puerto Rico and are roughly equivalent to 1:6000 scale (6K) quadrangles approximately 2 miles long on each side. Note: This file is a regional subset that has been extracted from a national file 6K quad file. Each regional extract includes a 20 mile buffer of tiles around each EPA Region. To access the national layer (size is greater than 80MB), go to https://edg.epa.gov/data/Public/OLEM/OLEM-OEM/6kquads_epa.zip.

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