NAD27 UTM

[jimmynholly7677]

anyone know waht this is?

 

Ignorance is no excuse!!!! Your never lost your always right there.... Its never tomorow its always today...

[+PDOP's]

Have a look at this web page

 

PDOP's GPS Pages

[+GEO*Trailblazer 1]

NAD 27 is North American Datum of 1927,most Public Lands States and Maps that have not been updated to the North American Datum of 1984(WGS-84) World Geodetic Survey of 1984. UTM is Universal Transverse Mercator.There is a long list of Map Datums.The bottom of the map you are using usually has the Type of Projection Used.Other Datums that are not usually referenced are Clark Spheriod of 1866.to the newest the Geoid-99 and DEFL-99.These are just the Measurements used to scale the GLOBE,(Earth).

 

THE MOST DANGEROUS ANIMAL IN THE FOREST DOES NOT EVEN LIVE THERE*********WHEN ALL ELSE FAILS*GEOTRYAGAIN **1803-2003 "LOUSIANA PURCHASE" 200TH ANNIVERSARY AND THE "LEWIS AND CLARK EXPADITION" http://www.lapurchase.org http://www.msnusers.com/MissouriTrails

[jimmynholly7677]

so which datum should i be using for cacheing???

 

i got it on the wgs-84 now i just changed it it was on iran one and i was way off..

 

Ignorance is no excuse!!!! Your never lost your always right there.... Its never tomorow its always today...

[stutzismydog]

GEO*

 

Good post on the subject.......thank you!

[+Renegade Knight]

Geocaching is WGS84

 

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Wherever you go there you are.

[+jonboy]

You certainly could cache with NAD27 and the UTM coordinate system, by switching your GPS receiver to NAD27 CONUS and converting the waypoint datum to NAD27. You might do this if you were navigating using a USGS Topographic Map, instead of just following a little arrow on a GPS. Almost all USGS quads are still using NAD27, they were supposed to have been updated to WGS84 metric maps, but with budget cuts and resistance to the metric system, 95 percent of maps are yet to be converted.

 

As for why to use the UTM system instead of Lat and Long, that is to enable map users to plot their position on a map. Most maps do not have grid lines drawn on them, so some users draw grid lines on their maps using the UTM hash marks on the edge of the map. Lattitude grid lines are actually curved, being wider near the equator and closer together as you near the poles. The UTM system is explained pretty simply here:

http://www.maptools.com/