+GOT GPS? Posted March 11, 2003 Share Posted March 11, 2003 Imagine using a North America map like this to find a cache, or even a city: A 1703 map that is crude, but a little more accurate. A 1710's map of North america An extremely crude map of the USA Some links to old mapping: http://www.libs.uga.edu/darchive/hargrett/maps/colamer.html http://www.mapsofpa.com/antiquemaps20.htm http://www.google.com/search?q=1703+map+Nouvelle&hl=en&lr=&ie=UTF-8&oe=UTF-8&start=10&sa=N With satelite technology we have great maps and positioning ability, but for people of late, they had a hard time navigating just to the general area of Boston Mass. [This message was edited by GOT GPS? on March 11, 2003 at 10:45 AM.] Quote Link to comment
+brad.32 Posted March 11, 2003 Share Posted March 11, 2003 It's all about clocks. John Harrison is our hero. When Captain Cook took Harrison's extremely accurate clocks (for the time) on his voyages, that greatly improved his ability to navigate and map the globe. GPS technology works because of accurate clocks. Light travels about 1 ft / nanosecond. Spatial accuracy depends on the ability to measure time accurately. Quote Link to comment
+GOT GPS? Posted March 11, 2003 Author Share Posted March 11, 2003 John Harrison links: http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=John+Harrison+1693 Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.