Data File Structures; Waypoint Files - Garmin Waypoint Manager User Manual

Data File
Structures
These files are transferred and stored in ASCII text format. A
simple editor is included in the program for editing these files,
or they can be edited using a standard text editor.
The files can be given any name desired. They will be stored in
the directories listed above.

Waypoint Files

A waypoint file can contain from 1,000 to 2,000 waypoints
depending on your model. Each waypoint in the file is a line of
text with the following information:
HANGER
OFFICE
USER1
Waypoint
Identifier
(up to 6
characters)
Latitude
degrees
(2 digits)
Latitude
minutes
(5 digits)
Latitude
hemisphere
(N or S)
This section contains information about the structure of
each of the following file types.
Waypoint files (stored in \WPTMGR\WAYPOINT
directory)
Route files (stored in \WPTMGR\ROUTE directory)
Track history files (stored in \WPTMGR\HISTORY
directory)
Waypoint identifier
Degrees latitude to the nearest 1/1,000th of a minute
North or South hemisphere.
Degrees longitude to the nearest 1/1,000th of a minute
East or West hemisphere
45 54.467 N 122 59.930 W
44 54.431 N 122 59.696 W
44 54.573 N 123 00.150 W
Longitude
hemisphere
(E or W)
Longitude
minutes
(5 digits)
Longitude
degrees
(3 degrees)