Manpages

NAME

gps, xgps, xgpsspeed, cgps, cgpxlogger − test clients for gpsd

SYNOPSIS

xgps [X−options] [−h] [−V] [−speedunits {[mph] | [kph] | [knots]}] [−altunits {[feet] | [meters]}] [−l [[d] | [m] | [s]]] [−s smoothing] [server [:port [:device]]]

xgpsspeed [−rv] [X−options] [−h] [−V] [−nc X−color] [−speedunits {[mph] | [kph] | [knots]}] [server [:port [:device]]]

cgps [−h] [−s] [−V] [−speedunits {[mph] | [kph] | [knots]}] [−altunits {[feet] | [meters]}] [−l [[d] | [m] | [s]]] [server [:port [:device]]]

gpxlogger [logfile]

cgpxlogger [−s gpsd−server] [−p gpsd−port] [−i poll−interval] [−h]

DESCRIPTION

xgps
xgps is a simple test client for gpsd with an X interface. It displays current GPS position/time/velocity information and (for GPSes that support the feature) the locations of accessible satellites.

xgps accepts an −h option as for gpsd, or a −V option to dump the package version and exit.

An optional argument may specify a server to get data from; a colon−separated suffix is taken as a port number. If there is a second colon−separated suffix, that is taken as a device name to be handed to the daemon in an F= command.

The −speedunits option can be used to set the speed units for display; follow the keyword with knots for nautical miles per hour, kph for kilometres per hour, or mph for miles per hour. The default is miles per hour. This option can also be set as the X resource ’speedunits’.

The −altunits option can be used to set the altitude units for display; follow the keyword with ’meters’ or ’feet’. The default is feet. This option can also be set as the X resource ’altunits’.

The −l option sets the format of latitude and longitude reports. The value ’d’ produces decimal degrees and is the default. The value ’m’ produces degrees and decimal minutes. The value ’s’ produces degrees, minutes, and decimal seconds.

The −s option sets the number of received sentences to process after any fix is received before blanking any field. By default it is set to 4, which prevents annoying display flicker on NMEA devices that send several difference sentence types per update cycle, only one of which is a true fix. Set this option to zero to disable smoothing and see each update exactly as it is sent.

There is a known bug in xgps; it assumes the default font size is no more than 18 pixels. If this is not the case, the satellite data display will show fewer than 12 satellites.

xgpsspeed
xgpsspeed is a speedometer that uses position information from the GPS. It accepts an −h option and optional argument as for gps, or a −V option to dump the package version and exit. Additionally, it accepts −rv (reverse video) and −nc (needle color) options.

The −speedunits option can be used to set the speed units for display; follow the keyword with knots for nautical miles per hour, kph for kilometres per hour, or mph for miles per hour. The default is miles per hour. This option can also be set as the X resource ’speedunits’.

cgps
cgps is a client resembling xgps, but without the pictorial satellite display and able to run on a serial terminal or terminal emulator.

The −s option prevents cgps from printing the raw data. This display can also be toggled with the s command.

Rather than use X resources to determine which units to use, cgps looks at variables in its environment. Here are the variables and values it checks:

GPSD_UNITS one of:
imperial = miles/feet
nautical = knots/feet
metric = km/meters
LC_MEASUREMENT

en_US = miles/feet

C = miles/feet
POSIX = miles/feet
[other] = km/meters
LANG

en_US = miles/feet

C = miles/feet
POSIX = miles/feet
[other] = km/meters

cgps terminates when you send it a SIGHUP or SIGINT; given default terminal settings this will happen when you type Ctl−C at it. It will also terminate on ’q’

cgpxlogger
This program connects to gpsd, polls for location, and logs each fix to standard output in GPX (XML) format.

The program also writes start and end messages to syslog.

gpxlogger
This program listens to DBUS broadcasts from gpsd (org.gpsd.fix) and logs each fix to standard output as they arrive in an XML format.

The output may be composed of multiple tracks. A new track is created if there’s no fix for 5 seconds.

The program also writes start and end messages to syslog.

SEE ALSO

gpsd(1), libgps(3), libgpsd(3), gpsprof(1), gpsfake(1).

AUTHORS

Remco Treffcorn, Derrick Brashear, Russ Nelson & Eric S. Raymond(xgps). Jeff Francis (cgps). Amaury Jacquot <sxpert [AT] esitcom.org> & Petter Reinholdtsen <pere [AT] hungry.com> (gpxlogger). Chris Kuethe <chris.kuethe [AT] gmail.com> (cgpxlogger).

This manual page by Eric S. Raymond <esr [AT] thyrsus.com>. There is a project page, with xgps screenshots, at [1]berlios.de.

REFERENCES

1. berlios.de

http://gpsd.berlios.de/

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