/ 
Geo-Direction-Distance-0.0.2
River stage zero No dependents
/ Geo::Direction::Distance

NAME

Geo::Direction::Distance - Process between Lat-Lng coordinates and direction - distance

SYNOPSIS

use Geo::Direction::Distance;
# Export two functions, dirdist2latlng and latlng2dirdist.

# Calcurate direction/distance from two coordinates (in wgs84 ellipsoid,degree format)
# Return values are direction (0-360 degree format), distance [m unit].
my @fromlatlng  = (35.000,135.000);
my @tolatlng    = (36.000,136.000);
my ($dir,$dist) = latlng2dirdist(@fromlatlng,@tolatlng);

# Calcurate coordinate from one coordinate and direction, distance.
# Return values are direction (0-360 degree format), distance [m unit].
my @fromlatlng  = (35.000,135.000);
my ($dir,$dist) = (270.000,5000.00);
my @tolatlng    = dirdist2latlng(@fromlatlng,$dir,$dist);

# If you want to use other ellipsoid, you can set ellipsoid name as option.
my ($dir,$dist) = latlng2dirdist(@fromlatlng,@tolatlng,{ellps => clrk66});

# You can also set original ellipsoid parameter.
# parameter keys are same with proj4.
my @tolatlng    = dirdist2latlng(@fromlatlng,$dir,$dist,{a => 6378165.0, rf => 298.3});

EXPORT METHODS

  • dirdist2latlng

  • latlng2dirdist

INTERNAL METHODS

  • p2v_pp

  • set_af

  • v2p_pp

TODO

Get ellipsoid information from Geo::Proj4, Geo::Proj or Geo::Shape object.
Can accept other distance unit

DEPENDENCIES

Math::Trig

AUTHOR

OHTSUKA Ko-hei <nene@kokogiko.net>

LICENCE AND COPYRIGHT

Copyright (c) 2008, OHTSUKA Ko-hei <nene@kokogiko.net>. 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 COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF 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 THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, 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 LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.