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.\" ========================================================================
.\"
.IX Title "Net::GPSD3::Return::TPV 3pm"
.TH Net::GPSD3::Return::TPV 3pm "2011-03-24" "perl v5.14.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Net::GPSD3::Return::TPV \- Net::GPSD3 Return TPV Object
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  printf "Time: %s, Lat: %s, Lon: %s\en", $object\->time, $object\->lat, $object\->lon;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Provides a Perl object interface to the Time-Velocity-Position (\s-1TVP\s0) object returned by the \s-1GPSD\s0 daemon.
.PP
Example \s-1JSON\s0 objects:
.PP
\fIProtocol 3.1 Versions\fR
.IX Subsection "Protocol 3.1 Versions"
.PP
.Vb 12
\&  {
\&    "class":"TPV",
\&    "tag":"MID2",
\&    "device":"/dev/ttyUSB0",
\&    "time":1253593085.470,
\&    "ept":0.005,
\&    "lat":38.88945123,
\&    "lon":\-77.03522143,
\&    "track":171.7249,
\&    "speed":0.467,
\&    "mode":2
\&  }
\&
\&  {
\&    "class":"TPV",
\&    "tag":"MID2",
\&    "device":"/dev/ttyUSB0",
\&    "time":1253593667.430,
\&    "ept":0.005,
\&    "lat":38.88945123,
\&    "lon":\-77.03522143,
\&    "alt":146.911,
\&    "track":180.0000,
\&    "speed":0.194,
\&    "climb":\-0.157,
\&    "mode":3
\&  }
.Ve
.PP
\fIProtocol 3.4 Version\fR
.IX Subsection "Protocol 3.4 Version"
.PP
.Vb 10
\&  {
\&    "class":"TPV",
\&    "tag":"0x0106",
\&    "device":"/dev/cuaU0",
\&    "time":"2011\-03\-20T06:51:59.12Z",
\&    "ept":0.005,
\&    "lat":37.371427205,
\&    "lon":\-122.015179890,
\&    "alt":25.789,
\&    "epx":1.926,
\&    "epy":1.808,
\&    "epv":6.497,
\&    "track":0.0000,
\&    "speed":0.000,
\&    "climb":0.000,
\&    "eps":3.85,
\&    "mode":3
\&  }
.Ve
.SH "METHODS PROPERTIES"
.IX Header "METHODS PROPERTIES"
.SS "class"
.IX Subsection "class"
Returns the object class
.SS "string"
.IX Subsection "string"
Returns the \s-1JSON\s0 string
.SS "parent"
.IX Subsection "parent"
Return the parent Net::GPSD object
.SS "device"
.IX Subsection "device"
Name of originating device.
.SS "tag"
.IX Subsection "tag"
Type tag associated with this \s-1GPS\s0 sentence; from an \s-1NMEA\s0 device this is just the \s-1NMEA\s0 sentence type.
.SS "mode"
.IX Subsection "mode"
\&\s-1NMEA\s0 mode: \f(CW%d\fR, 0=no mode value yet seen, 1=no fix, 2=2D, 3=3D.
.SS "time"
.IX Subsection "time"
Seconds since the Unix epoch, \s-1UTC\s0.  The value may have a fractional part of up to .01sec precision.
.PP
Note: In 2.96 (protocol 3.4) the \s-1TPV\-\s0>time format changed from unix epoch to W3C, but this method hides that from the user.
.SS "timestamp"
.IX Subsection "timestamp"
W3C formated timestamp value either directly from the protocol >= 3.4 or calculated < 3.4.  The value may have a fractional part of up to .01sec precision.
.PP
Note: I expect that in protocol 3.5 the value will be passed directly as \s-1TPV\-\s0>timestamp
.SS "datetime"
.IX Subsection "datetime"
Returns a DateTime object
.SS "lat"
.IX Subsection "lat"
Latitude in degrees: +/\- signifies West/East
.SS "lon"
.IX Subsection "lon"
Longitude in degrees: +/\- signifies North/South.
.SS "alt"
.IX Subsection "alt"
Altitude in meters.
.SS "speed"
.IX Subsection "speed"
Speed over ground, meters per second.
.SS "track"
.IX Subsection "track"
Course over ground, degrees from true north.
.SS "climb"
.IX Subsection "climb"
Climb (postive) or sink (negative) rate, meters per second.
.SS "ept"
.IX Subsection "ept"
Estimated timestamp error (%f, seconds, 95% confidence).
.SS "epx"
.IX Subsection "epx"
.SS "epy"
.IX Subsection "epy"
Latitude error estimate in meters, 95% confidence.
.SS "epv"
.IX Subsection "epv"
Estimated vertical error in meters, 95% confidence.
.SS "eps"
.IX Subsection "eps"
Speed error estimate in meters/sec, 95% confifdence.
.SS "epd"
.IX Subsection "epd"
Direction error estinmate in degrees, 95% confifdence.
.SS "epc"
.IX Subsection "epc"
Climb/sink error estinmate in meters/sec, 95% confifdence.
.SH "METHODS VALUE ADDED"
.IX Header "METHODS VALUE ADDED"
.SS "point"
.IX Subsection "point"
Returns a GPS::Point Object
.SH "BUGS"
.IX Header "BUGS"
Log on \s-1RT\s0 and Send to gpsd-dev email list
.SH "SUPPORT"
.IX Header "SUPPORT"
DavisNetworks.com supports all Perl applications including this package.
.PP
Try gpsd-dev email list
.SH "AUTHOR"
.IX Header "AUTHOR"
.Vb 5
\&  Michael R. Davis
\&  CPAN ID: MRDVT
\&  STOP, LLC
\&  domain=>michaelrdavis,tld=>com,account=>perl
\&  http://www.stopllc.com/
.Ve
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
This program is free software licensed under the...
.PP
.Vb 1
\&  The BSD License
.Ve
.PP
The full text of the license can be found in the \s-1LICENSE\s0 file included with this module.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Net::GPSD3, GPS::Point, Net::GPSD3::Return::Unknown