/ 
GPS-Point-0.09
River stage one • 5 direct dependents • 6 total dependents
/ GPS::Point

NAME

GPS::Point - Provides an object interface for a GPS point.

SYNOPSIS

use GPS::Point;
my $obj=GPS::Point->newGPSD($GPSD_O_line);#e.g. GPSD,O=....
my $obj=GPS::Point->new(
       time        => $time,    #float seconds from the unix epoch
       lat         => $lat,     #signed degrees
       lon         => $lon,     #signed degrees
       alt         => $hae,     #meters above the WGS-84 ellipsoid
       speed       => $speed,   #meters/second (over ground)
       heading     => $heading, #degrees clockwise from North
       climb       => $climb,   #meters/second
       etime       => $etime,   #float seconds
       ehorizontal => $ehz,     #float meters
       evertical   => $evert,   #float meters
       espeed      => $espeed,  #meters/second
       eheading    => $ehead,   #degrees
       eclimb      => $eclimb,  #meters/second
       mode        => $mode,    #GPS mode [?=>undef,None=>1,2D=>2,3D=>3]
       tag         => $tag,     #Name of the GPS message for data
     );

DESCRIPTION

This is a re-write of Net::GPSD::Point that is more portable.

GPS::Point - Provides an object interface for a GPS fix (e.g. Position, Velocity and Time).

Note: Please use Geo::Point, if you want 2D or projection support.

USAGE

print $point->latlon. "\n";               #use a "." here to force latlon to scalar context
my ($x,$y,$z)=$point->ecef;               #if Geo::ECEF is available
my $GeoPointObject=$point->GeoPoint;      #if Geo::Point is available
my @distance=$point->distance($point2);   #if Geo::Inverse is available
my $distance=$point->distance($point2);   #if Geo::Inverse->VERSION >=0.05

USAGE TODO

my $obj=GPS::Point->newNMEA($NMEA_lines); #e.g. GGA+GSA+RMC

CONSTRUCTOR

new

my $obj = GPS::Point->new();

newGPSD

my $obj=GPS::Point->newGPSD($GPSD_O_line);#e.g. GPSD,O=....

METHODS

time

Sets or returns seconds since the Unix epoch, UTC (float, seconds)

print $obj->time, "\n";

lat, latitude

Sets or returns Latitude (float, degrees)

print $obj->lat, "\n";

lon, long or longitude

Sets or returns Longitude (float, degrees)

print $obj->lon, "\n";

alt, altitude

Sets or returns Altitude (float, meters)

print $obj->alt, "\n";

speed

Sets or returns speed (float, meters/sec)

print $obj->speed, "\n";

heading, bearing

Sets or returns heading (float, degrees)

print $obj->heading, "\n";

climb

Sets or returns vertical velocity (float, meters/sec)

print $obj->climb, "\n";

etime

Sets or returns estimated timestamp error (float, seconds, 95% confidence)

print $obj->etime, "\n";

ehorizontal

Sets or returns horizontal error estimate (float, meters)

print $obj->ehorizontal, "\n";

evertical

Sets or returns vertical error estimate (float, meters)

print $obj->evertical, "\n";

espeed

Sets or returns error estimate for speed (float, meters/sec, 95% confidence)

print $obj->espeed, "\n";

eheading

Sets or returns error estimate for course (float, degrees, 95% confidence)

print $obj->eheading, "\n";

eclimb

Sets or returns Estimated error for climb/sink (float, meters/sec, 95% confidence)

print $obj->eclimb, "\n";

mode

Sets or returns the NMEA mode (integer; undef=>no mode value yet seen, 1=>no fix, 2=>2D, 3=>3D)

print $obj->mode, "\n";

tag

Sets or returns a tag identifying the last sentence received. For NMEA devices this is just the NMEA sentence name; the talker-ID portion may be useful for distinguishing among results produced by different NMEA talkers in the same wire. (string)

print $obj->tag, "\n";

fix

Returns either 1 or 0 based upon if the GPS point is from a valid fix or not.

print $obj->fix, "\n";

latlon, latlong

Returns Latitude, Longitude as an array in array context and as a space joined string in scalar context

my @latlon=$point->latlon;
my $latlon=$point->latlon;

ecef

Returns ECEF coordinates if Geo::ECEF is available.

my ($x,$y,$z) = $point->ecef;
my @xyz       = $point->ecef;
my $xyz_aref  = $point->ecef; #if Geo::ECEF->VERSION >= 0.08

GeoPoint

Returns a Geo::Point Object in the WGS-84 projection.

my $GeoPointObject = $point->GeoPoint;

distance

Returns distance. The argument can be a GPS::Point, Geo::Point, {lat=>$lat,lon=>$lon} (can be blessed), [$lat, $lon] (can be blessed) or a Lat, Lon scalar pair.

my ($faz, $baz, $dist) = $point->distance($pt2); #Array context
my $dist = $point->distance($lat, $lon);  #if Geo::Inverse->VERSION >=0.05

track

Returns a point object at the predicted location in time seconds assuming constant velocity. Using Geo::Forward calculation.

my $new_point=$point->track($seconds);

BUGS

SUPPORT

Try GPSD-DEV email list

AUTHOR

Michael R. Davis
CPAN ID: MRDVT
DavisNetworks.com
account=>perl,tld=>com,domain=>michaelrdavis
http://www.davisnetworks.com/

COPYRIGHT

This program is free software licensed under the...

The BSD License

The full text of the license can be found in the LICENSE file included with this module.

SEE ALSO

Geo::Point, Net::GPSD, Net::GPSD::Point, Geo::ECEF, Geo::Functions, Geo::Inverse, Geo::Distance, Geo::Ellipsoids, Geo::Forward