Manual

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11.12. Settings to obtain correct north direction
In some cases, it is necessary to obtain a correct north orientation of the map for NMEA
output from Marvelmind system. For example, when using a Marvelmind mobile beacon
as the navigation data source for Pixhawk installed on a copter, correct north is required
for correct yaw control of the copter. The Marvelmind system cannot determine north
automatically, so the user should make corrections after building and freezing the map.
It can be done in one of two ways:
Option 1
- Rotate the Marvelmind map using the dashboard as shown on the screenshot below
- You can also view the video:
https://www.youtube.com/watch?v=AsYXrtg7aVU&feature=youtu.be
Option 2
- Enter the angle correction (the angle shown on screenshot) on the Pixhawk side from
the Mission Planner of APM Planner
- Refer to the parameter "BCN_ORIENT_YAW":
http://ardupilot.org/copter/docs/parameters.html?highlight=bcn_orient_yaw