User's Manual

Geospatial information

This message provides standard NMEA-formatted positional information, including latitude,

longitude, altitude, course, and speed. Geospatial information messages can be

enabled/disabled using the $GN or $OP command.

$GN <latitude>,<longitude>,<altitude>,<course>,<speed>*xx

Parameter

Description

latitude

Latitude in d.ddddddd format (float). The latitude is presented in the N

basis (negative latitudes are in the southern hemisphere)

longitude

Longitude in d.ddddddd format (float). The longitude is presented in the E

basis (negative longitudes are in the western hemisphere)

altitude

Altitude in meters (integer)

course

Course in degrees (0..359) (integer). Course proceeds clockwise, with

0=north, 90=east, 180=south, and 270=west

speed

Speed in kilometers per hour (0..999.99) (integer * 100)