If a geodetic mark's datasheet has the word SCALED to the right of the mark's coordinates, those coordinates are based on scaling (with a ruler) using a topographic map. (If not SCALED, it will say ADJUSTED.) Scaled coordinates are given to the nearest second with zero decimal places. Scaled coordinates can occasionally be off by as much as 6 seconds, which translates to roughly 600 feet. Therefore, hunting a scaled benchmark absolutely requires using the to-reach part of the datasheet.

scaled (last edited 2009-03-21 21:03:18 by localhost)