NAME
Geo::Ellipsoids - Standard perl Geo package for Ellipsoids a and f (and invf) values.
SYNOPSIS
use Geo::Ellipsoids;
my $obj = Geo::Ellipsoids->new();
$obj->set('WGS84'); #default
print "a=", $obj->a, "\n";
print "b=", $obj->b, "\n";
print "f=", $obj->f, "\n";
print "i=", $obj->i, "\n";DESCRIPTION
CONSTRUCTOR
new
The new() constructor may be called with any parameter that is appropriate to the set method.
my $obj = Geo::Ellipsoid->new();
METHODS
list
Method returns a list of known elipsoid names.
a
Method returns the value of the semi-major axis.
f
Method returns the value of flatting
i
Method returns the value of the inverse flatting
invf
Method synonym for the i method
b
Method returns the value of the semi-minor axis.
e2
Method returns the value of eccentricity squared (e.g. e^2)
e
Method returns the value of eccentricity
set
longname
Method returns the long name of the current ellipsoid
shortname
Method returns the shortname, which is the hash key, of the current ellipsoid
data
Method returns a hash reference for the ellipsoid definition data structure.
name2ref
Method returns a hash reference (e.g. {a=>6378137,i=>298.257223563}) when passed a valid ellipsoid name (e.g. 'WGS84').
TODO
BUGS
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
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
Geo::Forward Geo::Ellipsoid