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'\" t
.\" Title: gps
.\" Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\" Date: 9 Aug 2004
.\" Manual: GPSD Documentation
.\" Source: The GPSD Project
.\" Language: English
.\"
.TH "GPS" "1" "9 Aug 2004" "The GPSD Project" "GPSD Documentation"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
gps, xgps, xgpsspeed, cgps, lcdgps, gegps \- test clients for gpsd
.SH "SYNOPSIS"
.HP \w'\fBxgps\fR\ 'u
\fBxgps\fR [\-D\ \fIdebug\-level\fR] [\-h] [\-V] [\-l\ [[d]\ |\ [m]\ |\ [s]]] [\-u\ [[i]\ |\ [n]\ |\ [m]]] [\fIserver\fR [\fI:port\fR [\fI:device\fR]]]
.HP \w'\fBxgpsspeed\fR\ 'u
\fBxgpsspeed\fR [\-D\ \fIdebug\-level\fR] [\-h] [\-V] [\-\-speedunits\ {[mph]\ |\ [kph]\ |\ [knots]}] [\fIserver\fR [\fI:port\fR [\fI:device\fR]]]
.HP \w'\fBcgps\fR\ 'u
\fBcgps\fR [\-D\ \fIdebug\-level\fR] [\-h] [\-V] [\-l\ [[d]\ |\ [m]\ |\ [s]]] [\-m] [\-s] [\-u\ [[i]\ |\ [n]\ |\ [m]]] [\fIserver\fR [\fI:port\fR [\fI:device\fR]]]
.HP \w'\fBlcdgps\fR\ 'u
\fBlcdgps\fR [\-h] [\-V] [\-l\ [[d]\ |\ [m]\ |\ [s]]] [\-u\ [[i]\ |\ [n]\ |\ [m]]] [\fIserver\fR [\fI:port\fR [\fI:device\fR]]]
.HP \w'\fBgpxlogger\fR\ 'u
\fBgpxlogger\fR [\-D\ \fIdebug\-level\fR] [\-d] [\-e\ \fIexport\-method\fR] [\-f\ \fIfilename\fR] [\-l] [\-m\ \fIminmove\fR] [\-h] [\-V] [\-i\ \fItrack\ timeout\fR] [\fIserver\fR [\fI:port\fR [\fI:device\fR]]]
.HP \w'\fBgegps\fR\ 'u
\fBgegps\fR [\-d\ \fIdirectory\fR] [\-i]
.SH "DESCRIPTION"
.PP
These are the demonstration clients shipped with
gpsd\&. They have some common options:
.PP
The
\fB\-h\fR
option causes each client to emit a summary of its options and then exit\&.
.PP
The
\fB\-V\fR
option causes each client to dump the package version and exit\&.
.PP
The
\fB\-l\fR
option, when present, sets the format of latitude and longitude reports\&. The value \*(Aqd\*(Aq produces decimal degrees and is the default\&. The value \*(Aqm\*(Aq produces degrees and decimal minutes\&. The value \*(Aqs\*(Aq produces degrees, minutes, and decimal seconds\&.
.PP
xgps,
cgps, and
lcdgps
look at variables in the environment to figure out what units they should default to using for display \(em imperial, nautical, or metric\&. Here are the variables and values they check:
.sp
.if n \{\
.RS 4
.\}
.nf
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
.fi
.if n \{\
.RE
.\}
.PP
These preferences may be overridden by the
\fB\-u\fR
option\&.
.PP
Where present, the
\fB\-u\fR
option can be used to set the system units for display; follow the keyword with \*(Aqi\*(Aq for \*(Aqimperial\*(Aq for American units (feet in altitude and error estimates, miles per hour in speeds), \*(Aqn\*(Aq for \*(Aqnautical\*(Aq (feet in altitude and error estimates, knots in speed) or \*(Aqm\*(Aq for \*(Aqmetric\*(Aq (meters in altitude and error estimates, kilometers per hour in speeds)\&.
.PP
The
\fB\-D\fR
option, when present, sets a debug level; it is primarily for use by GPSD developers\&. It enables various progress messages to standard error\&.
.PP
By default, clients collect data from all compatible devices on localhost, using the default GPSD port 2947\&. An optional argument to any client 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 specific device name to be watched\&. However, if the server specification contains square brackets, the part inside them is taken as an IPv6 address and port/device suffixes are only parsed after the trailing bracket\&. Possible cases look like this:
.PP
localhost:/dev/ttyS1
.RS 4
Look at the default port of localhost, trying both IPv4 and IPv6 and watching output from serial device 1\&.
.RE
.PP
example\&.com:2317
.RS 4
Look at port 2317 on example\&.com, trying both IPv4 and IPv6\&.
.RE
.PP
71\&.162\&.241\&.5:2317:/dev/ttyS3
.RS 4
Look at port 2317 at the specified IPv4 address, collecting data from attached serial device 3\&.
.RE
.PP
[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:2317:/dev/ttyS5
.RS 4
Look at port 2317 at the specified IPv6 address, collecting data from attached serial device 5\&.
.RE
.PP
Not all clients shipped with GPSD are documented here\&. See also the separate manual pages for
\fBgpspipe\fR(1)
and
\fBgpsmon\fR(1)\&.
.SS "xgps"
.PP
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\&.
.PP
In the sky view, satellites are color\-coded to indicate quality of signal; consult the data display to the left for exact figures in dB\&. Square icons indicate WAAS/EGNOS satellites, circles indicate ordinary GPS satellites\&. Filled icons were used in the last fix, outline icons were not\&.
.SS "xgpsspeed"
.PP
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\&.
.PP
The default display mode resembles a car speedometer\&. With the option \-\-nautical you get a more elaborate speed and track presentation modeled after a marine navigation display\&.
.PP
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\&.
.PP
In the nautical mode only, \-\-maxspeed sets the maximum on the speedometer\&.
.SS "cgps"
.PP
cgps
is a client resembling
xgps, but without the pictorial satellite display and able to run on a serial terminal or terminal emulator\&.
.PP
The
\fB\-s\fR
option prevents
cgps
from displaying the data coming from the daemon\&. This display can also be toggled with the s command\&.
.PP
The
\fB\-m\fR
option will display your magnetic heading (as opposed to your true heading)\&. This is a calculated value, not a measured value, and is subject to a potential error of up to two degrees in the areas for which the calculation is valid (currently Western Europe, Alaska, and Lower 48 in the USA)\&. The formulas used are those found in the Aviation Formulary v1\&.43\&.
.PP
cgps
terminates when you send it a SIGHUP or SIGINT; given default terminal settings this will happen when you type Ctrl\-C at it\&. It will also terminate on \*(Aqq\*(Aq
.SS "lcdgps"
.PP
A client that passes
gpsd
data to
lcdproc, turning your car computer into a very expensive and nearly feature\-free GPS receiver\&. Currently assumes a 4x40 LCD and writes data formatted to fit that size screen\&. Also displays 4\- or 6\-character Maidenhead grid square output\&.
.SS "gpxlogger"
.PP
This program collects fixes from
gpsd
and logs them to standard output in GPX, an XML profile for track logging\&.
.PP
The output may be composed of multiple tracks\&. A new track is created if there\*(Aqs no fix for an interval specified by the
\fB\-i\fR
and defaulting to 5 seconds\&.
.PP
The
\fB\-d\fR
option tells
gpxlogger
to run as a daemon in background\&. It requires the
\fB\-f\fR
option, which directs output to a specified logfile\&.
.PP
The
\fB\-m\fR
option sets a minimum move distance in meters (it may include a fractional decimal part)\&. Motions shorter than this will not be logged\&.
.PP
gpxlogger
can use any of the export methods that
gpsd
supports\&. For a list of these methods, use the
\fB\-l\fR\&. To force the method, give the
\fB\-e\fR
one of the colon\-terminated method names from the
\fB\-l\fR
table\&.
.PP
If D\-Bus support is available on the host, GPSD is configured to use it, and
\fB\-e dbus\fR
is specified, this program listens to DBUS broadcasts from
gpsd
via org\&.gpsd\&.fix\&.
.PP
With
\fB\-e sockets\fR, or if sockets is the method defaulted to, you may give a server\-port\-device specification as arguments\&.
.SS "gegps"
.PP
This program collects fixes from
gpsd
and feeds them to a running instance of Google Earth for live location tracking\&.
.PP
The
\fB\-d\fR
argument is the location of the Google Earth installation directory\&. If not specified, it defaults to the current directory\&.
.PP
If you have the free (non\-subscription) version, start by running with the
\fB\-i\fR
option to drop a clue in the Google Earth installation directory, as \*(AqOpen_in_Google_Earth_RT_GPS\&.kml\*(Aq, then open that file in Places (File > Open\&.\&.\&.)\&. Run
gpsd
in the normal way after that\&.
.SH "SEE ALSO"
.PP
\fBgpsd\fR(8),
\fBlibgps\fR(3),
\fBlibgpsd\fR(3),
\fBgpsfake\fR(1),
\fBgpsctl\fR(1),
\fBgpscat\fR(1),
\fBgpsprof\fR(1)\&.
\fBgpspipe\fR(1)\&.
\fBgpsmon\fR(1)\&.
.SH "AUTHORS"
.PP
Remco Treffcorn, Derrick Brashear, Russ Nelson & Eric S\&. Raymond, Jeff Francis (cgps)\&. Amaury Jacquot
<sxpert@sxpert\&.org>
& Petter Reinholdtsen
<pere@hungry\&.com>
(gpxlogger)\&. Chris Kuethe
<chris\&.kuethe@gmail\&.com>
(gpxlogger), Chen Wei
<weichen302@aol\&.com>
(gegps & xgpsspeed), Robin Wittler
<real@the\-real\&.org>
(xgpsspeed)\&.
.PP
This manual page by Eric S\&. Raymond
<esr@thyrsus\&.com>
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