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January 19, 2007, Newsletter Issue #123: Minutes and Seconds
1
Tip of the Week
You can find yourself anywhere on earth if you use latitude and longitude, which are measured in degrees. Each degree is subdivided into minutes and then seconds - so one degree of latitude (or longitude) is the same as sixty minutes of latitude.
Thatīs why topo maps are often published as 15-minutes quadrangles, or 7.5-minute quadrangles. A 15-minute topo map covers an area 15 minutes of latitude by 15 minutes of longitude.
2
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