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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 10 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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