Map Ruler Specifications

Scale	Maps	Front Side			Back Side
Scale	Maps	Span	Ruler Increments in Minutes	Ruler Increments in Seconds	Ruler Increments in meters	Ruler Increments in Miles or Nautical Miles
1:5,000	NOAA Marine charts	0.5 min	0.01 min	1 sec	5 m	0.005 nm
1:10,000	NOAA Marine charts	0.5 min	0.01 min	1 sec	10 m	0.01 nm
1:15,000	NOAA Marine charts	1 min	0.01 min	1 sec	10 m	0.01 nm
1:20,000	NOAA Marine charts British Columbia TRIM Maps (Terrain Resource Information Management)	1 min	0.01 min	1 sec	10 m	0.01 nm
1:24,000	USGS 7.5 minute topographic maps	2.5 min	0.01 min	1 sec	10 m	0.01 mi
1:25,000	USGS 7.5 minute topographic maps of Alaska and a few places in the Continental United States	2.5 min	0.01 min	1 sec	10 m	0.01 mi
1:30,000	NOAA Marine charts	2 min	0.01 min	1 sec	10 m	0.01 nm
1:40,000	NOAA Marine charts	2.5 min	0.01 min	1 sec	25 m	0.01 nm
1:40,680	National Geographic Trails Illustrated Maps	4 min	0.01 min	1 sec	50 m	0.01 mi
1:50,000	Canadian National Topographic System (NTS) maps USGS County series topographic maps	5 min	0.01 min	1 sec	50 m	0.05 mi
1:62,500	USGS 15 minute topographic maps	5 min	0.05 min	1 sec	50 m	0.05 mi
1:63,360	USGS 15 minute topographic maps of Alaska 1 inch = 1 mile	5 min	0.05 min	1 sec	50 m	0.05 mi
1:65,000	Delorme Atlas & Gazetteers for: Connecticut	5 min	0.05 min	1 sec	50 m	0.05 mi
1:69,500	Green Trails Maps of Washington & Oregon	5 min	0.05 min	1 sec	50 m	0.05 mi
1:75,000	Some National Geographic Trails Illustrated Maps	5 min	0.05 min	1 sec	100 m	0.05 m
1:77,000	Delorme Atlas & Gazetteers for: New Jersey	5 min	0.05 min	1 sec	50 m	0.05 nm
1:80,000	NOAA Marine charts	5 min	0.05 min	1 sec	50 m	0.05 nm
1:80,000	Delorme Atlas & Gazetteers for: Massachusetts	7.5 min	0.05 min	1 sec	50 m	0.05 nm
1:84,000	Delorme Atlas & Gazetteers for: Hawaii	7.5 min	0.05 min	1 sec	50 m	0.05 nm
1:100,000	USGS & BLM 30 X 60 minute topographic maps Delorme Atlas & Gazetteers for: Delaware Maryland New Hampshire Vermont	10 min	0.05 min	5 sec	50 m	0.05 mi
1:100,000	NOAA Marine charts	10 min	0.05 min	5 sec	50 m	0.1 nm
1:125,000	Delorme Atlas & Gazetteers for: Maine (Old editions. New editions are 1:135,000)	7.5 min	0.05 min	5 sec	50 m	0.1 mi
1:126,720	US Forest Service forest maps 1/2 inch = 1 mile maps	7.5 min	0.05 min	5 sec	50 m	0.1 mi
1:150,000	Delorme Atlas & Gazetteers for: California Florida Illinois Kentucky Michigan (Old Editions. New Editions are 1:160,000) New York North Carolina (Old Editions. New Editions are 1:160,000) Ohio (Old Editions. New Editions are 1:160,000) Oklahoma Oregon (Old Editions. New Editions are 1:160,000 and 1:320,000) Pennsylvania South Carolina Tennessee Virginia Washington (Old Editions. New Editions are 1:160,000) West Virginia Wisconsin (Old Editions. New Editions are 1:160,000)	15 min	0.1 min	5 sec	100 m	0.1 mi
1:156,000	Delorme Atlas & Gazetteers for: Indiana	15 min	0.05 min	5 sec	100 m	0.1 mi
1:160,000	Delorme Atlas & Gazetteers for: Colorado Michigan (New Editions.) North Carolina (New Editions.) Ohio (New Editions.) Oregon (New Editions.) Washington (New Editions.) Wisconsin (New Editions.)	15 min	0.05 min	5 sec	100 m	0.1 mi
1:182,000	Delorme Atlas & Gazetteers for: Georgia Louisiana Mississippi	15 min	0.1 min	5 sec	100 m	0.1 mi
1:190,000	Delorme Atlas & Gazetteers for: Minnesota (Old editions. New editions are 1:205,000)	15 min	0.1 min	5 sec	100 m	0.1 mi
1:200,000	Delorme Atlas & Gazetteers for: Alabama (Old editions. New editions are 1:182,000) Arkansas Iowa Kansas Kentucky (New Editions. Old Editions are 1:150,000) Missouri Nebraska North Dakota South Dakota	15 min	0.1 min	10 sec	100 m	0.1 mi
1:250,000	USGS 1 X 2 degree series topographic maps Canadian National Topographic System (NTS) maps Delorme Atlas & Gazetteers for: Arizona (Old editions. New editions are 1:260,000) Idaho Montana Nevada Utah (Old editions. New editions are 1:235,000) Wyoming (Old editions. New editions are 1:225,000)	15 min	0.1 min	15 sec	100 m	0.1 mi
1:300,000	Delorme Atlas & Gazetteers for: Alaska New Mexico	30 min	0.1 min	10 sec	100 m	0.1 mi
1:320,000	Delorme Atlas & Gazetteers for: Colorado Oregon (New Editions)	30 min	0.1 min	10 sec	100 m	0.1 mi
1:400,000	Delorme Atlas & Gazetteers for: Alaska Texas	30 min	0.5 min	15 sec	500 m	0.5 mi
1:500,000	USGS State Base Maps NOAA Aeronautical Sectionals	30 min	0.5 min	30 sec	500 m	0.5 mi

NOTE: As DeLorme has been updating their atlases, they have been changing map scales. We have not been able to keep up, and do not have rulers for some of the new scales.