--- /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(@_);
+}
git://git.onelab.eu / plewww.git / blobdiff