GPSTgeo.pm

   1 package GPSTgeo;
   2
   3 #=======================================================================
   4 # $Id$
   5 # File ID: 6ac1a50e-fafa-11dd-a267-000475e441b9
   6 #
   7 # Character set: UTF-8
   8 # ©opyleft 2002– Øyvind A. Holm <sunny@sunbase.org>
   9 # License: GNU General Public License, see end of file for legal stuff.
  10 #=======================================================================
  11
  12 use strict;
  13 use warnings;
  14
  15 BEGIN {
  16     use Exporter ();
  17     our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
  18
  19     my $rcs_id = '$Id$';
  20     push(@main::version_array, $rcs_id);
  21     $VERSION = ($rcs_id =~ / (\d+) /, $1);
  22
  23     @ISA = qw(Exporter);
  24     @EXPORT = qw(&list_nearest_waypoints &ddd_to_dms);
  25     %EXPORT_TAGS = ();
  26 }
  27 our @EXPORT_OK;
  28
  29 sub list_nearest_waypoints {
  30     # {{{
  31     my ($Lat, $Lon, $Count) = @_;
  32
  33     # FIXME: Hardcoding
  34     my $waypoint_file = "/home/sunny/gps/waypoints.gpx";
  35
  36     # FIXME: Incredible unfinished and kludgy.
  37     if (open(WaypFP, "$main::Cmd{'gpsbabel'} -i gpx -f $waypoint_file " .
  38                      "-x radius,lat=$Lat,lon=$Lon,distance=1000 " .
  39                      "-o gpx -F - |")
  40     ) {
  41         my $Str = join("", <WaypFP>);
  42         $Str =~ s{
  43             ^.*?<wpt\s.*?>.*?<name>(.+?)</name>.*?</wpt>.*?
  44              .*?<wpt\s.*?>.*?<name>(.+?)</name>.*?</wpt>.*?
  45              .*?<wpt\s.*?>.*?<name>(.+?)</name>.*?</wpt>.*$
  46         }{
  47             "($1, $2, $3)";
  48         }sex;
  49         return($Str);
  50     } else {
  51         die("$main::progname: Cannot open $main::Cmd{'gpsbabel'} pipe: $!\n");
  52     }
  53     # }}}
  54 }
  55
  56 sub ddd_to_dms {
  57     # Convert floating-point degrees into D°M'S.S" (ISO-8859-1).
  58     # Necessary for import into GPSman. Based on toDMS() from
  59     # gpstrans-0.39 to ensure compatibility.
  60     # {{{
  61     my $ddd = shift;
  62     my $Neg = 0;
  63     my ($Hour, $Min, $Sec) =
  64        (    0,    0,    0);
  65     my $Retval = "";
  66
  67     ($ddd =~ /^\-?(\d*)(\.\d+)?$/) || return(undef);
  68     length($ddd) || ($ddd = 0);
  69
  70     if ($ddd < 0.0) {
  71         $ddd = 0 - $ddd;
  72         $Neg = 1;
  73     }
  74     $Hour = int($ddd);
  75     $ddd = ($ddd - $Hour) * 60.0;
  76     $Min = int($ddd);
  77     $Sec = ($ddd - $Min) * 60.0;
  78
  79     if ($Sec > 59.5) {
  80         $Sec = 0.0;
  81         $Min += 1.0;
  82     }
  83     if ($Min > 59.5) {
  84         $Min = 0.0;
  85         $Hour += 1.0;
  86     }
  87     $Retval = sprintf("%s%.0f\xB0%02.0f'%04.1f\"",
  88                       $Neg
  89                         ? "-"
  90                         : "",
  91                       $Hour, $Min, $Sec);
  92     return $Retval;
  93     # }}}
  94 }
  95
  96 1;