#! perl -w

use strict;

my $usage = <<__EOT__;
Usage:
$0 [<latitude> <longitude>] [-test]
Converts latitude and longitude (in degrees) to format suitable for Mo
+nkMap.
    -test    runs selftest
__EOT__

my ($lat, $lon, $test) = (0, 0, 0);
if (@ARGV == 2) {
    ($lat, $lon) = @ARGV;
}
elsif (@ARGV == 1 && $ARGV[0] eq '-test') {
    $test = 1;
}
else {
    die $usage;
}

if ($test) {
    selftest();
}
else {
    printf "%s\n", ll2monkmap ($lat, $lon);
}

exit;


sub ll2monkmap {
    my ($lat, $lon) = @_;
    sprintf "%12.5f%12.5f   <!-- Location:latitude=%s,longitude=%s-->"
+, $lat, $lon, dec2degminsec($lat), dec2degminsec($lon);
}

sub dec2degminsec {
    my $dec = shift;

    while ($dec < -180) {
        $dec += 360;
    }
    while ($dec > 180) {
        $dec -= 360;
    }

    my $neg = $dec < 0;
    $dec = - $dec if $neg;

    my $deg = int $dec;
    $dec -= $deg;

    $dec *= 60;
    my $min = int $dec;
    $dec -= $min;

    $dec *= 60;
    my $sec = int $dec;

    sprintf "%s%03d.%02d.%02d", $neg ? "-" : "", $deg, $min, $sec;
}

sub selftest {
    my @angles = ( -360, -270, -180, -90, 0, 90, 180, 270, 360 );
    my @deltas = ( -0.445, 0, 0.555    );
    for my $d (@deltas) {
        for my $a (@angles) {
            my $x = $a+$d;
            my $str = dec2degminsec($x);
            my $strll = ll2monkmap($x, $x);
            print "$strll\n";
        }
    }
}

__END__

Author:    rudif@bluemail.ch 
        rudif@lecroy.com

    46.20832     6.14296   <!-- Location:latitude=046.12.29,longitude=
+006.08.34-->
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