Map Ruler Specifications
Scale
Maps
Front Side
Back Side
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
1:50,000
  • 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"=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
1:77,000
  • 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
7.5 min
0.05 min
5 sec
50 m
0.1 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
7.5 min
0.05 min
5 sec
50 m
0.1 mi
1:126,720
  • US Forest Service forest maps
  • 1/2"=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
    • New York
    • North Carolina
    • Ohio
    • Oklahoma
    • Oregon
    • Pennsylvania
    • South Carolina
    • Tennessee
    • Virginia
    • Washington
    • West Virginia
    • Wisconsin
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
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
15 min
0.1 min
5 sec
100 m
0.1 mi
1:200,000
  • Delorme Atlas & Gazetteers for:
    • Alabama
    • Arkansas
    • Iowa
    • Kansas
    • 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
    • Idaho
    • Montana
    • Nevada
    • Utah
    • Wyoming
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
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