First the numbers:

A test at HARN Station Albert
PID: FJ1359

NGS data Sheet NAD83 UTM Zone 14 Coordinates in meters

Easting 629,057 meters

Northing 3,936,678 meters

NAVD88 372.4 meters

Ellipsoid Height 345.31 meters


Albert marked as a waypoint with the Map 330

NAD83 UTM Zone 14

Easting 629,056 meters

Northing 3,936,678 meters

Elevation 370 meters


Albert marked as a waypoint with the Meridian Color

NAD83 UTM Zone 14

Easting 629,057 meters

Northing 3,936,679 meters

Elevation 370 meters

How accurate is it? The question comes frequently. My answer is almost always the same. The proof is in the dirt.

I took two GPS receivers with me to Oklahoma City a few weeks ago and visited a HARN station called Albert to mark it as a waypoint. This weekend I finally downloaded the data sheet to see how well it worked.

Phil

I sure wish you'd have gone and done some obs. on Station INDIAN (beside the Initial Point stone) while you were in the "neighborhood". I'd still like to have some true "gps'd" coordinates on that station to compare to our last year's "mini-ORGI" session on the point.

As for the use of UTM......do you find many applications of UTM coordinates. This was the system (UTM coords) we decided to use on the Columbia Search and Recovery mission. Unfortunately everyone was instructed to do locations in NAD83 UTM and when we decided to lay the 1k grid blocks on the ground for the search teams, we worked with NAD83 and all the quad maps had NAD27 UTM grid lines. This actually results in a 20 meter shift East and West...not a significant problem when map related... but some 200 meter shift North/South... a real discrepancy when trying to relate a line to a map. But, the ease of following "big round numbers" with the ProMark2 (Map 330) and flag 5 kilometers of line a day was great. Can't think of a better system than UTM for that application.

Modified By J.D. Billings on 3/31/2003 at 11:05 PM