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Geo::Forward.3pm
Langue: en
Version: 2006-12-09 (fedora - 06/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
Geo::Forward - Calculate geographic location from lat, lon, distance, and heading.SYNOPSIS
use Geo::Forward; my $obj = Geo::Forward->new(); # default "WGS84" my ($lat1,$lon1,$faz,$dist)=(38.871022, -77.055874, 62.888507083, 4565.6854); my ($lat2,$lon2,$baz) = $obj->forward($lat1,$lon1,$faz,$dist); print "Input Lat: $lat1 Lon: $lon1\n"; print "Input Forward Azimuth: $faz\n"; print "Input Distance: $dist\n"; print "Output Lat: $lat2 Lon: $lon2\n"; print "Output Back Azimuth: $baz\n";
DESCRIPTION
This module is a pure Perl port of the NGS program in the public domain ``forward'' by Robert (Sid) Safford and Stephen J. Frakes.CONSTRUCTOR
new
The new() constructor may be called with any parameter that is appropriate to the ellipsoid method which establishes the ellipsoid.
my $obj = Geo::Forward->new(); # default "WGS84"
METHODS
ellipsoid
Method to set or retrieve the current ellipsoid object. The ellipsoid is a Geo::Ellipsoids object.
my $ellipsoid=$obj->ellipsoid; #Default is WGS84 $obj->ellipsoid('Clarke 1866'); #Built in ellipsoids from Geo::Ellipsoids $obj->ellipsoid({a=>1}); #Custom Sphere 1 unit radius
forward
This method is the user frontend to the mathematics. This interface will not change in future versions.
my ($lat2,$lon2,$baz) = $obj->forward($lat1,$lon1,$faz,$dist);
TODO
Add tests for more ellipsoids.BUGS
Please send to the geo-perl email list.LIMITS
No guarantees that Perl handles all of the double precision calculations in the same manner as Fortran.AUTHOR
Michael R. Davis qw/perl michaelrdavis com/LICENSE
Copyright (c) 2006 Michael R. Davis (mrdvt92)This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
Net::GPSD Geo::Spline Geo::Ellipsoid Geo::EllipsoidsContenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre