NAME

       gpsplot - tool to dynamically dump plot data from gpsd

SYNOPSIS

       gpsplot [OPTIONS] [server[:port[:device]]]

       gpsplot -h

       gpsplot -V

DESCRIPTION

       gpsplot is a tool to connect to gpsd and dynamically plot data to the users screen. Plot
       types include scatterplots and stripcharts.

       Plotting requires the Python Matplotlib module, and its many dependencies be installed on
       the display host. If the display host is not the gpsd host, then Matplotlib is not
       required to be on the gpsd host.

       gpslot does not require root privileges, but can be run as root. Running under sudo will
       cause some loss of functionality. It can be run concurrently with other tools connecting
       to the local gpsd without causing problems.

OPTIONS

       -?, -h, --help
           Print a usage message and exit.

       -b BACKEND, --backend BACKEND
           Set the Matplotlib interactive backend to BACKEND.

       -B, --backends
           Print available Matplotlib interactive backends, then exit. The Matplotlib backends
           vary wildly in how fst they run and how good they look. Try them all to see for
           yourself.

       -d LVL, --debug LVL
           Set debug level to LVL.

       --device DEVICE
           The DEVICE on the gpsd to connect to. Defaults to all.

       --exit
           Exit after --count, --file, or --file completes.

       --fields FIELDS
           The code for the fields to plot. FIELDS is one of: llh (lat/lon/altHAE) or llm
           (lat/lon/altMSL).

       --file FILE
           Read JSON from FILE instead of from gpsd..

       --host HOST
           Connect to the gpsd on HOST (server). Defaults to localhost.

       --image IMAGE.EXT
           Save plot as IMAGE.EXT. EXT determines image type (.jpg, .png, etc.). Which EXT are
           supported is installation dependent.

       -n COUNT, --count COUNT
           Stop after COUNT plot messages. 0 to disable. Default 0',

       --plottype PLOTTYPE
           The type of plot to make. PLOTTYPE is one of 'scatterplot' or 'stripchart'.

       -p PORT, --port PORT
           Use PORT to connect to gpsd. Defaults to 2947.

       -V, --version
           Print the program version and exit.

       -x SECONDS, --seconds SECONDS
           Stop after SECONDS. 0 to disable. Default 0',

ARGUMENTS

       By default, clients collect data from the local gpsd daemon running on localhost, using
       the default GPSD port 2947. The optional argument to any client may override this
       behavior: [server[:port[:device]]]

       For further explanation, and examples, see the ARGUMENTS section in the gps(1) man page

ENVIRONMENT

       You can set the environment variable MPLBACKEND to your desired Matplotlib backend. This
       save you from using -b BACKEND every time you run gpsplot.

EXAMPLES

       Generate a scatterplot of Latitude, Longitude and the Altitude above Mean Sea Level
       (altMSL). Stop after 60 seconds:

           gpsplot --seconds 60 --fields llm

       Generate a scatterplot of Latitude, Longitude and the Height Above Ellipsoid (altHAE).
       Stop after 60 fixes:

           gpsplot --count 60 --plottype stripchart

       Use the WXAgg backend to repeat the last experiment to see if it is faster or looks better
       to you.

           export MPLBACKEND=WX
           gpsplot --count 60 --plottype stripchart

       Generate a scatterplot locally of Latitude, Longitude and altMSL from a remote gpsd
       instance at host "example.com" and the remote device "/dev/ttyS0". Collect 60 fixes, Stop,
       save the plot as "save.jpg, and exit:

           gpsplot --count 60 --exit --fields llm --image save.jpg example.com::/dev/ttyS0

RETURN VALUES

       0
           on success.

       1
           on failure

SEE ALSO

       gpsd(8), gpsprof(1), gpsfake(1).

RESOURCES

       Project web site: https://gpsd.io/

COPYING

       This file is Copyright 2020 by the GPSD project
       SPDX-License-Identifier: BSD-2-clause

AUTHOR

       Gary E. Miller