A generic position and navigation data structure. More...

#include <ocpn_types.h>

Public Attributes
double	kLat
	Latitude in decimal degrees.

double	kLon
	Longitude in decimal degrees.

double	kCog
	Course over ground in degrees.

double	kSog
	Speed over ground in knots.

double	kVar
	Magnetic variation in degrees.

double	kHdm
	Magnetic heading in degrees.

double	kHdt
	True heading in degrees.

time_t	FixTime
	UTC time of fix.

int	nSats
	Number of satellites used in the fix.

Detailed Description

A generic position and navigation data structure.

This structure provides position and navigation data that may come from various sources:

GNSS receiver (primary source)
Last known position (when GNSS signal is lost)
User-defined position (when manually moved on map)
Dead reckoning (calculated from last known position and movement)

Definition at line 68 of file ocpn_types.h.

Member Data Documentation

◆ FixTime

time_t GenericPosDatEx::FixTime

UTC time of fix.

If GNSS available: Time from most recent GNSS message
If GNSS watchdog expired: Current system time

Definition at line 118 of file ocpn_types.h.

◆ kCog

double GenericPosDatEx::kCog

Course over ground in degrees.

Definition at line 86 of file ocpn_types.h.

◆ kHdm

double GenericPosDatEx::kHdm

Magnetic heading in degrees.

May be NaN if heading sensor data is not available.

Definition at line 104 of file ocpn_types.h.

◆ kHdt

double GenericPosDatEx::kHdt

True heading in degrees.

May be NaN if true heading cannot be calculated (requires both magnetic heading and variation).

Definition at line 111 of file ocpn_types.h.

◆ kLat

double GenericPosDatEx::kLat

Latitude in decimal degrees.

May represent last known position rather than current true position if:

GNSS signal is lost
Position has been manually set by user on map

Definition at line 75 of file ocpn_types.h.

◆ kLon

double GenericPosDatEx::kLon

Longitude in decimal degrees.

May represent last known position rather than current true position if:

GNSS signal is lost
Position has been manually set by user on map

Definition at line 83 of file ocpn_types.h.

◆ kSog

double GenericPosDatEx::kSog

Speed over ground in knots.

May be NaN if speed cannot be determined.

Definition at line 92 of file ocpn_types.h.

◆ kVar

double GenericPosDatEx::kVar

Magnetic variation in degrees.

Typically sourced from NMEA RMC message.

Definition at line 98 of file ocpn_types.h.

◆ nSats

int GenericPosDatEx::nSats

Number of satellites used in the fix.

Will be 0 if:

GNSS watchdog has expired
Position is not from GNSS

Definition at line 126 of file ocpn_types.h.

The documentation for this struct was generated from the following file:

/home/runner/work/main/main/opencpn/model/include/model/ocpn_types.h

Public Attributes