Ham Radio log to interactive OpenStreetMap

You might notice that there’s now a Ham Radio QSO Map lurking on the front page. Thanks to the WordPress OpenStreetMap plugin (which I’ve slightly abused before). Here’s a small piece of Perl which will take your ADIF log and convert it to a WP-OSM marker file.

Note that this program assumes you’ve downloaded your log from QRZ.com, as it requires the locator field for both inbound and outbound stations.

#!/usr/bin/perl -w
# adif2osm - convert ADIF log to OSM map file
# scruss.com / VA3PID - 2011/06/19

use strict;
use constant MARKERDIR =>
  'https://glaikit.org/wp-content/plugins/osm/icons/';
use constant QRZURL => 'http://qrz.com/db/';
sub maidenhead2latlong;

my ( $temp, @results ) = '';

### Fast forward past header
while (<>) {
  last if m/<eoh>\s+$/i;
}

### While there are records remaining...
while (<>) {
  $temp .= $_;

  ### Process if end of record tag reached
  if (m/<eor>\s+$/i) {
    my %hash;
    $temp =~ s/\n//g;
    $temp =~ s/<eoh>.*//i;
    $temp =~ s/<eor>.*//i;
    my @arr = split( '<', $temp );
    foreach (@arr) {
      next if (/^$/);
      my ( $key, $val ) = split( '>', $_ );
      $key =~ s/:.*$//;
      $hash{ lc($key) } = $val unless ( $key eq '' );
    }
    push @results, \%hash;
    $temp = '';
  }
}

# generate OSM plugin file
my @data = ();
my ( $mygrid, $station_callsign ) = '';

# output header
print
  join( "\t", qw/lat lon title description icon iconSize iconOffset/ ),
  "\n";
foreach (@results) {
  next unless ( exists( $_->{gridsquare} ) && exists( $_->{call} ) );
  $mygrid = $_->{my_gridsquare}
    if ( exists( $_->{my_gridsquare} ) );
  $station_callsign = $_->{station_callsign}
    if ( exists( $_->{station_callsign} ) );

  push @data, $_->{freq} . ' MHz' if ( exists( $_->{freq} ) );
  $data[$#data] .= ' (' . $_->{band} . ')' if ( exists( $_->{band} ) );
  push @data, $_->{mode} if ( exists( $_->{mode} ) );
  push @data, $_->{qso_date} . ' ' . $_->{time_on} . 'Z'
    if ( exists( $_->{qso_date} ) && exists( $_->{time_on} ) );
  my ( $lat, $long ) = maidenhead2latlong( $_->{gridsquare} );
  print join( "\t",
    $lat,
    $long,
    '<a href="' . QRZURL . $_->{call} . '">' . $_->{call} . '</a>',
    join( ' - ', @data ),
    MARKERDIR . 'wpttemp-green.png',
    '0,-24' ),
    "\n";

  @data = ();
}

# show home station last, so it's on top
my ( $lat, $long ) = maidenhead2latlong($mygrid);
print join( "\t",
  $lat,
  $long,
  '<a href="'
    . QRZURL
    . $station_callsign . '">'
    . $station_callsign . '</a>',
  'Home Station',
  MARKERDIR . 'wpttemp-red.png',
  '0,-24' ),
  "\n";

exit;

sub maidenhead2latlong {

  # convert a Maidenhead Grid location (eg FN03ir)
  #  to decimal degrees
  # this code could be cleaner/shorter/clearer
  my @locator =
    split( //, uc(shift) );    # convert arg to upper case array
  my $lat      = 0;
  my $long     = 0;
  my $latdiv   = 0;
  my $longdiv  = 0;
  my @divisors = ( 72000, 36000, 7200, 3600, 300, 150 )
    ;                          # long,lat field size in seconds
  my $max = ( $#locator > $#divisors ) ? $#divisors : $#locator;

  for ( my $i = 0 ; $i <= $max ; $i++ ) {
    if ( int( $i / 2 ) % 2 ) {    # numeric
      if ( $i % 2 ) {             # lat
        $latdiv = $divisors[$i];    # save for later
        $lat += $locator[$i] * $latdiv;
      }
      else {                        # long
        $longdiv = $divisors[$i];
        $long += $locator[$i] * $longdiv;
      }
    }
    else {                          # alpha
      my $val = ord( $locator[$i] ) - ord('A');
      if ( $i % 2 ) {               # lat
        $latdiv = $divisors[$i];    # save for later
        $lat += $val * $latdiv;
      }
      else {                        # long
        $longdiv = $divisors[$i];
        $long += $val * $longdiv;
      }
    }
  }
  $lat  += ( $latdiv / 2 );         # location of centre of square
  $long += ( $longdiv / 2 );
  return ( ( $lat / 3600 ) - 90, ( $long / 3600 ) - 180 );
}

You’ll need to update MARKERDIR to reflect your own WP-OSM installation. Mine might move, so if you don’t change it, and you don’t get markers, please don’t blame me.

The basic code to include a map is like this:

You’ll need to change the marker_file URL, too.

Note that, while this script generates links into the QRZ callsign database, it doesn’t hit that site unless you click a link.