PDA

View Full Version : UTM vs. Lat/Long


Scouter
08-12-2009, 11:41 AM
Using latitude and longitude is alright if you're navigating over long distances such as when flying a plane or navigating a ship. But for people using maps to navigate on foot, bicycle, or even in motor vehicles for short distances, latitude and longitude are impractical.

For land navigation, the grid system most commonly used is the Universal Transverse Mercator or, as it's commonly called, UTM system. The UTM system was developed by the military during World War I for long-range military artillery, but its practicality for any type of land navigation soon made it the universal standard for all military uses, and it quickly migrated to non-military use.

The following link will provide a document with great information on how to use the UTM system as well as some good info on GPS datums and spatial coordinate systems:

How To Use UTM (http://norwela.org/documents/How_to_use_UTM.pdf)

Scouter
08-12-2009, 11:58 AM
To download a free 24k Quad UTM overlay:

24,000 Quad UTM Overlay (http://norwela.org/documents/24kPocket.pdf)

How to make overlays from these files

To produce usable overlays you need to print directly onto or copy onto clear transparency film. Toner based printers and copiers will produce overlays that are prone to having the toner scratched off. Some have reported success laminating the transparency film to protect the image.

Scouter
08-15-2009, 03:59 PM
Website changed servers and restored an old backup. Will update the links to the information on Monday.

rwamf
08-27-2009, 09:20 AM
Thanks
Great info
R