Provided by: libgeo-gpx-perl_1.09-1_all 
NAME
Geo::Gpx - Create and parse GPX files
SYNOPSIS
my ($gpx, $waypoints, $tracks);
# From a filename, an open file, or an XML string:
$gpx = Geo::Gpx->new( input => $fname );
$gpx = Geo::Gpx->new( input => $fh );
$gpx = Geo::Gpx->new( xml => $xml );
my $waypoints = $gpx->waypoints();
my $tracks = $gpx->tracks();
DESCRIPTION
"Geo::Gpx" supports the parsing and generation of GPX data.
Constructor
new( input => ($fname | $fh) or xml => $xml [, work_dir => $working_directory ] )
Create and return a new "Geo::Gpx" instance based on a *.gpx file ($fname), an open
filehandle ($fh), or an XML string ($xml). GPX 1.0 and 1.1 are supported.
The optional "work_dir" (or "wd" for short) specifies where to save any working files,
such as with the save() method. It can be supplied as a relative path or as an
absolute path. If "work_dir" is omitted, it is set based on the path of the $fname
supplied or the current working directory if the constructor is called with an XML
string or a filehandle (see "set_wd()" for more info).
clone()
Returns a deep copy of a "Geo::Gpx" instance.
$clone = $self->clone;
Methods
waypoints( $int or name => $name )
Without arguments, returns the array reference of waypoints.
With an argument, returns a reference to the waypoint whose "name" field is an exact
match with $name or the one at integer index $int (1-indexed). Returns "undef" if none
are found such that this method can be used to check if a specific point exists (i.e.
no exception is raised if $name or $int do not exist) .
waypoints_add( $point or \%point [, $point or \%point, X ] )
Add one or more waypoints. Each waypoint must be either a Geo::Gpx::Point or a hash
reference with fields that can be parsed by Geo::Gpx::Point's "new()" constructor. See
the later for the possible fields.
%point = ( lat => 54.786989, lon => -2.344214, ele => 512, name => 'My house' );
$gpx->waypoints_add( \%point );
or
$pt = Geo::Gpx::Point->new( %point );
$gpx->waypoints_add( $pt );
waypoints_search( $field => $regex )
returns an array of waypoints whose $field (e.g. "name", "desc", X) matches $regex. By
default, the regex is case-sensitive; specify "qr/(?i:search_string_here)/" to ignore
case.
waypoints_count()
returns the number of waypoints in the object.
waypoints_delete_all()
delete all waypoints. Returns true.
waypoint_delete( $name )
delete the waypoint whose "name" is an exact match, case sensitively. Returns true if
successful, "undef" if the name cannot be found.
waypoints_merge( $gpx, $regex )
Merge waypoints with those contained in the Geo::Gpx instance provide as argument.
Waypoints are compared based on their respective "name" fields, which must exist in
$gpx (if names are missing in the current instance, all points will be merged).
A $regex may be provided to limit the merge to a subset of waypoints from $gpx.
Returns the number of points successfully merged (i.e. the difference in
"$gps->waypoints_count" before and after the merge).
waypoint_closest_to( $point of $tcx_trackpoint )
From any Geo::Gpx::Point or Geo::TCX::Trackpoint object, return the waypoint that is
closest to it. If called in list context, returns a two-element array consisting of
that waypoint, and the distance from the coordinate (in meters).
routes( integer or name => 'name' )
Returns the array reference of routes when called without argument. Optionally accepts
a single integer referring to the route number from routes aref (1-indexed) or a key
value pair with the name of the route to be returned.
routes_add( $route or $points_aref [, name => $route_name )
Add a route to a "Geo::Gpx" object. The $route is expected to be an existing route
(i.e. a hash ref). Returns true. A new route can also be created based an array
reference(s) of Geo::Gpx::Point objects and added to the "Geo::Gpx" instance.
"name" and all other meta fields supported by routes can be provided and will
overwrite any existing fields in $route.
routes_count()
returns the number of routes in the object.
tracks( integer or name => 'name' )
Returns the array reference of tracks when called without argument. Optionally accepts
a single integer referring to the track number from tracks aref (1-indexed) or a key
value pair with the name of the track to be returned.
tracks_add( $track or $points_aref [, $points_aref, X ] [, name => $track_name ] )
Add a track to a "Geo::Gpx" object. The $track is expected to be an existing track
(i.e. a hash ref). Returns true.
If $track has no "name" field and none is provided, the timestamp of the first point
of the track will be used (this is experimental and may change in the future). All
other fields supported by tracks can be provided and will overwrite any existing
fields in $track.
A new track can also be created based an array reference(s) of Geo::Gpx::Point objects
and added to the "Geo::Gpx" instance. If more than one array reference is supplied,
the resulting track will contain as many segments as the number of aref's provided.
tracks_count()
returns the number of tracks in the object.
iterate_waypoints()
iterate_trackpoints()
iterate_routepoints()
Get an iterator for all of the waypoints, trackpoints, or routepoints in a "Geo::Gpx"
instance, as per the iterator chosen.
iterate_points()
Get an iterator for all of the points in a "Geo::Gpx" instance, including waypoints,
trackpoints, and routepoints.
my $iter = $gpx->iterate_points();
while ( my $pt = $iter->() ) {
print "Point: ", join( ', ', $pt->{lat}, $pt->{lon} ), "\n";
}
bounds( $iterator )
Compute the bounding box of all the points in a "Geo::Gpx" returning the result as a
hash reference.
my $gpx = Geo::Gpx->new( xml => $some_xml );
my $bounds = $gpx->bounds();
returns a structure like this:
$bounds = {
minlat => 57.120939,
minlon => -2.9839832,
maxlat => 57.781729,
maxlon => -1.230902
};
$iterator defaults to "$self->iterate_points" if not specified.
xml( $version )
Generate and return an XML string representation of the instance.
If the version is omitted it defaults to the value of the "version" attribute. Parsing
a GPX document sets the version. If the "version" attribute is unset defaults to 1.0.
TO_JSON
For compatibility with JSON modules. Convert this object to a hash with keys that
correspond to the above methods. Generated ala:
my %json = map { $_ => $self->$_ }
qw(name desc author keywords copyright
time link waypoints tracks routes version );
$json{bounds} = $self->bounds( $iter );
With one difference: the keys will only be set if they are defined.
save( filename => $fname, key/values )
Saves the "Geo::Gpx" instance as a file.
The filename field is optional unless the instance was created without a filename (i.e
with an XML string or a filehandle) and "set_filename()" has not been called yet. If
the filename is a relative path, the file will be saved in the instance's working
directory (not the caller's, "Cwd").
key/values are (all optional):
"force": overwrites existing files if true, otherwise it won't.
"extensions": save "<extensions>X</extension>" tags if true (defaults to false).
"meta_time": save the "<time>X</time>" tag in the file's meta information tags if
true (defaults to false). Some applications like MapSource return an error if this
tags is present. (All other time tags elsewhere are kept.)
set_filename( $filename )
Sets/gets the filename. Returns the name of the file with the complete path.
set_wd( $folder )
Sets/gets the working directory for any eventual saving of the *.gpx file and checks
the validity of that path. It can be set as a relative path (i.e. relative to the
actual Cwd) or as an absolute path, but is always returned as a full path.
This working directory is always defined. The previous one is also stored in memory,
such that "set_wd('-')" switches back and forth between two directories. The module
never actually "chdir"'s, it just keeps track of where the user wishes to save files.
Accessors
name( $str )
desc( $str )
copyright( $str )
keywords( $aref )
Accessors to get or set the "name", "desc", "copyright", or "keywords" fields of the
"Geo::Gpx" instance.
author( $href )
The author information is stored in a hash that reflects the structure of a GPX 1.1
document. To set it, supply a hash reference as ("link" and "email" are optional):
{
link => { text => 'Hexten', href => 'http://hexten.net/' },
email => { domain => 'hexten.net', id => 'andy' },
name => 'Andy Armstrong'
},
link( $href )
The link is stored similarly to the author information, it can be set by supplying a
hash reference as:
{ link => { text => 'Hexten', href => 'http://hexten.net/' } }
time( $epoch )
Accessor for the <time> element of a GPX. The time is converted to a Unix epoch time
when a GPX document is parsed, therefore only epoch time is supported for setting.
version()
Returns the schema version of a GPX document. Versions 1.0 and 1.1 are supported.
DEPENDENCIES
DateTime, DateTime::Format::ISO8601, Geo::Coordinates::Transform, HTML::Entities,
Math::Trig, Scalar::Util, XML::Descent
SEE ALSO
JSON
BUGS AND LIMITATIONS
No bugs have been reported.
Please report any bugs or feature requests to "bug-geo-gpx@rt.cpan.org", or through the
web interface at <http://rt.cpan.org>.
AUTHOR
Originally by Rich Bowen "<rbowen@rcbowen.com>" and Andy Armstrong "<andy@hexten.net>".
This version by Patrick Joly "<patjol@cpan.org>".
Please visit the project page at: <https://github.com/patjoly/geo-gpx>.
VERSION
1.09
LICENSE AND COPYRIGHT
Copyright (c) 2004-2022, Andy Armstrong "<andy@hexten.net>", Patrick Joly
"patjol@cpan.org". All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same
terms as Perl itself. See perlartistic.
DISCLAIMER OF WARRANTY
BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE,
TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE
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ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO
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HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY
THE ABOVE LICENSE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
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