+++ /dev/null
-#!/usr/bin/perl -w
-
-##############################################################################
-## Plots user supplied lat/longs on a user chosen map.
-##
-## plot-latlong reads lat/long values from stdin and writes a PNG to
-## stdout. The input should contain one pair of lat/long values per line,
-## with the values separated by whitespace. Blank lines and lines starting
-## with the pound character ('#') are ignored.
-##
-## Command line options are
-##
-## -m <map-name> specifies the name of a map to use (default: the first
-## map listed in .mapinfo: 'World'); see .mapinfo for the valid map names;
-## see the file CONFIG for a description of the .mapinfo format
-##
-## -s <point-size> specifies the size of the points to draw (default: 1);
-## points are filled squares, and the size is the width in pixels
-##
-## -c causes the pixel coordinates of each lat/long to be printed to stderr;
-## the coordinates (0, 0) are at the upper left corner, and values increase
-## to the right and down
-##
-## -i <map-info-file> specifies an alternate location for .mapinfo (other
-## than in the current directory or $HOME).
-##
-##----------------------------------------------------------------------------
-##
-## The code for handling the Alber/Lambert map projection is derived from
-## GTrace v1.0.0beta (http://www.caida.org/tools/visualization/gtrace),
-## which was written by Ram Periakaruppan. The included set of maps are also
-## derived from the GTrace distribution. GTrace redistributed these maps
-## with the permission of VisualRoute (http://www.visualroute.com),
-## the original source of the maps.
-##
-##----------------------------------------------------------------------------
-##
-## Copyright (C) 2003,2004,2005 The Regents of the University of California.
-## All Rights Reserved.
-##
-## Permission to use, copy, modify and distribute any part of this
-## plot-latlong software package for educational, research and non-profit
-## purposes, without fee, and without a written agreement is hereby
-## granted, provided that the above copyright notice, this paragraph
-## and the following paragraphs appear in all copies.
-##
-## Those desiring to incorporate this into commercial products or use
-## for commercial purposes should contact the Technology Transfer
-## Office, University of California, San Diego, 9500 Gilman Drive, La
-## Jolla, CA 92093-0910, Ph: (858) 534-5815, FAX: (858) 534-7345.
-##
-## IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY
-## PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
-## DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS
-## SOFTWARE, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF
-## THE POSSIBILITY OF SUCH DAMAGE.
-##
-## THE SOFTWARE PROVIDED HEREIN IS ON AN "AS IS" BASIS, AND THE
-## UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
-## SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. THE UNIVERSITY
-## OF CALIFORNIA MAKES NO REPRESENTATIONS AND EXTENDS NO WARRANTIES
-## OF ANY KIND, EITHER IMPLIED OR EXPRESS, INCLUDING, BUT NOT LIMITED
-## TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
-## PARTICULAR PURPOSE, OR THAT THE USE OF THE SOFTWARE WILL NOT INFRINGE
-## ANY PATENT, TRADEMARK OR OTHER RIGHTS.
-##
-## The plot-latlong software is developed by the plot-latlong Team at the
-## University of California, San Diego under the Cooperative Association
-## for Internet Data Analysis (CAIDA) Program. Support for this work is
-## provided by the National Communications System (NCS) via NSF grant
-## ANI-0221172, entitled "Routing and Peering Analysis for Enhancing
-## Internet Performance and Security."
-##
-##############################################################################
-
-use strict;
-use File::Basename;
-use GD;
-use Getopt::Std;
-use vars qw($opt_m $opt_s $opt_c $opt_i);
-
-sub usage
-{
- die "usage: cat datapoints | plot-latlong [-m <map-name>] [-s <point-size>] [-c] [-i <map-info-file>] >output.png\n";
-}
-
-if (not getopts('m:s:ci:'))
-{
- usage();
-}
-
-my $DEBUG = 0;
-my $PI = 3.141592654;
-
-my $point_size = $opt_s || 1;
-
-my $first_map;
-my $map_directory; # directory containing map images
-my %configuration;
-my @mapinfo_locations = (".mapinfo", "$ENV{HOME}/.mapinfo");
-if ($opt_i) {
- unshift @mapinfo_locations, $opt_i;
-}
-load_configuration(@mapinfo_locations);
-
-my $selected_map = $opt_m || $first_map;
-
-# lat/long of the upper-left and lower-right corners of the map image
-my $map_top_lat;
-my $map_top_long;
-my $map_bottom_lat;
-my $map_bottom_long;
-
-# parameters for linear projection: pixels per degree
-my $map_lat_scale;
-my $map_long_scale;
-
-# parameters for Alber projection (supplied by user):
-# (in degrees)
-my $R; # radius of sphere
-#my $phi_1; # standard parallel
-#my $phi_2; # standard parallel
-#my $phi_0; # origin latitude
-#my $lambda_0; # origin longitude
-my $false_easting; # the false easting amount
-my $false_northing; # the false northing amount
-
-# values for Alber projection calculated from user parameters:
-# (in radians)
-my $PHI_1;
-my $PHI_2;
-my $PHI_0;
-my $LAMBDA_0;
-my $N;
-my $C;
-
-my $conversion_fn; # pointer to function for converting lat/long to (x, y)
-
-my $map = load_map($selected_map);
-
-#############################################################################
-
-my $green = $map->colorAllocate(64, 192, 64);
-my $red = $map->colorAllocate(220, 64, 64);
-
-while (<>)
-{
- chomp;
- next if /^\s*$/;
- next if /^\s*#/;
-
- # REQUIRE: -90 <= $lat <= 90
- my ($lat, $long) = split /\s+/;
- my $adjusted_long = $long;
- if ($long < $map_top_long) {
- $adjusted_long += 360;
- } elsif ($long > $map_bottom_long) {
- $adjusted_long -= 360;
- }
- my ($x, $y) = &$conversion_fn($lat, $adjusted_long);
-
- print STDERR "$lat $long $x $y\n" if $DEBUG || $opt_c;
-
- if ($point_size == 1)
- {
- $map->setPixel($x, $y, $red);
- }
- else
- {
- my $half = int($point_size / 2);
- my $left_x = $x - $half;
- my $top_y = $y - $half;
- $map->filledRectangle($left_x, $top_y,
- $left_x + $point_size - 1, $top_y + $point_size - 1,
- $red);
- }
-}
-
-print $map->png if not $DEBUG;
-
-#############################################################################
-#############################################################################
-
-sub convert_latlong_to_xy_linear
-{
- my ($lat, $long) = @_;
-
- my $lat_rel = $map_top_lat - $lat;
- my $long_rel = $long - $map_top_long;
-
- return ($long_rel * $map_long_scale, $lat_rel * $map_lat_scale);
-}
-
-#############################################################################
-
-
-# See the publication "Map Projections Used by the U.S. Geological
-# Survey Bulletin 1532" for details about this projection.
-#
-# However, the present coder does not know exactly which projection this
-# function corresponds to in the USGS Bulletin.
-
-sub round {
- my ($number) = @_;
- return int($number + .5 * ($number <=> 0));
-}
-
-sub convert_latlong_to_xy_alber
-{
- my ($lat, $long) = @_;
-
- my $phi = ($lat * $PI) / 180.0;
- my $lambda = ($long * $PI) / 180.0;
-
- my $p = ($R * sqrt($C - 2.0 * $N * sin($phi))) / $N;
- my $p_0 = ($R * sqrt($C - 2.0 * $N * sin($PHI_0))) / $N;
- my $theta = $N * ($lambda - $LAMBDA_0);
-
- my $x = $false_easting + round($p * sin($theta));
- my $y = $false_northing - round($p_0 - $p * cos($theta));
-
- return ($x, $y);
-}
-
-############################################################################
-
-sub load_map
-{
- my ($name) = @_;
-
- if (not exists $configuration{"MAP $name"})
- {
- die "ERROR: Map '$name' not found in map configuration file.\n";
- }
-
- print("OPEN: $name ", $configuration{"MAP $name"}, "\n") if $DEBUG;
-
- my $filename;
- ($filename, $map_top_lat, $map_top_long, $map_bottom_lat, $map_bottom_long)
- = split(/\s+/, $configuration{"MAP $name"});
-
- my $path = "$map_directory/$filename";
- my $retval = new GD::Image($path)
- or die "ERROR: Couldn't open map image '$path': $!\n";
-
- my ($map_width, $map_height) = $retval->getBounds();
-
- print("DIM: $map_width $map_height\n") if $DEBUG;
-
- $map_lat_scale = $map_height / ($map_top_lat - $map_bottom_lat);
- $map_long_scale = $map_width / ($map_bottom_long - $map_top_long);
-
- print("SCALE: $map_lat_scale $map_long_scale\n") if $DEBUG;
-
- # -- projections -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-
- if (not exists $configuration{"PROJECTION $name"})
- {
- $conversion_fn = \&convert_latlong_to_xy_linear;
- }
- else
- {
- my @F = split(/\s+/, $configuration{"PROJECTION $name"});
- if ($F[0] eq "ALBER")
- {
- ($R, $false_easting, $false_northing) = @F[1,6,7];
- my ($phi_1, $phi_2, $phi_0, $lambda_0) = @F[2..5];
-
- $PHI_1 = ($phi_1 * $PI) / 180.0;
- $PHI_2 = ($phi_2 * $PI) / 180.0;
- $PHI_0 = ($phi_0 * $PI) / 180.0;
- $LAMBDA_0 = ($lambda_0 * $PI) / 180.0;
-
- $N = (sin($PHI_1) + sin($PHI_2)) / 2.0;
- $C = cos($PHI_1) ** 2 + 2.0 * $N * sin($PHI_1);
-
- $conversion_fn = \&convert_latlong_to_xy_alber;
- }
- else
- {
- die "INTERNAL ERROR: unknown projection '$F[0]'\n";
- }
- }
-
- return $retval;
-}
-
-#############################################################################
-
-sub load_configuration
-{
- foreach my $filename (@_)
- {
- if (-f $filename)
- {
- $map_directory = dirname($filename) . "/.mapimages";
- load_configuration_aux($filename);
- return;
- }
- }
-
- die "ERROR: Couldn't find map configuration file; looked for: @_\n";
-}
-
-sub load_configuration_aux
-{
- my ($filename) = @_;
-
- open CONFIG, "$filename"
- or die "ERROR: Couldn't open map configuration file '$filename': $!\n";
- while (<CONFIG>)
- {
- chomp;
- next if /^\s*$/;
- next if /^\s*#/;
-
- my @F = split /\s+/;
- if ($F[0] eq "MAP")
- {
- if ($#F == 6)
- {
- my ($top_lat, $top_long, $bot_lat, $bot_long) = @F[3..6];
- if (!check_coordinate($top_lat)
- || !check_coordinate($top_long)
- || !check_coordinate($bot_lat)
- || !check_coordinate($bot_long))
- {
- die "ERROR: Line $.: boundary coordinates are malformed in map configuration file.\n";
- }
-
- if ($top_lat < $bot_lat || $top_long > $bot_long)
- {
- die "ERROR: Line $.: boundary coordinates have wrong relations in map configuration file.\n";
- }
-
- $first_map = $F[1] if not defined $first_map;
- $configuration{"MAP $F[1]"} = join(" ", @F[2..6]);
- next;
- }
- }
- elsif ($F[0] eq "PROJECTION")
- {
- if ($#F >= 2)
- {
- if ($F[2] eq "ALBER")
- {
- if ($#F == 9)
- {
- foreach my $x (@F[3..9])
- {
- if (not check_number($x))
- {
- die "ERROR: Line $.: projection parameters are malformed in map configuration file.\n";
- }
- }
-
- $configuration{"PROJECTION $F[1]"} = join(" ", @F[2..9]);
- next;
- }
- }
- else
- {
- die "ERROR: Line $.: unknown map projection '$F[2]' in map configuration file.\n";
- }
- }
- }
- else
- {
- die "ERROR: Line $.: unknown key '$F[0]' in map configuration file.\n";
- }
-
- die "ERROR: Line $. of map configuration file is malformed.\n";
- }
- close CONFIG;
-}
-
-#############################################################################
-
-sub check_coordinate
-{
- my ($x) = @_;
-
- return $x =~ /^(\-?)\d+(\.\d+)?$/;
-}
-
-
-sub check_number
-{
- return check_coordinate(@_);
-}
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