+++ /dev/null
-MAP World World100.png 90 -170 -90 190
-MAP USA USA100.png 50 -125 24 -66
-MAP World50 World50-new.png 90 -170 -90 190
-MAP World100 World100.png 90 -170 -90 190
-MAP Africa Africa.png 38 -18 -35 52
-MAP Australia Australia.png -10 110 -45 155
-MAP Canada Canada.png 75 -142 41 -50
-MAP Caribbean Caribbean.png 27 -85 10 -59
-MAP CentralAmerica CentralAmerica.png 19 -93 5 -77
-MAP China China.png 54 73 18 135
-MAP Europe Europe.png 60 -15 35 30
-MAP Hawaii Hawaii.png 23 -161 18 -154
-MAP India India.png 36 68 5 110
-MAP Japan Japan.png 42 125 30 149
-MAP Korea Korea.png 44 124 34 131
-MAP MalaysiaIndonesia MalaysiaIndonesia.png 8 95 -11 135
-MAP MiddleEast MiddleEast.png 43 25 12 78
-MAP NewZealand NewZealand.png -34 166 -48 180
-MAP NOSEFI NOSEFI.png 72 4 55 32
-MAP Philippines Philippines.png 19 117 5 127
-MAP USA50 USA50-new.png 50 -125 24 -66
-MAP USA100 USA100.png 50 -125 24 -66
-MAP USA200 USA200.png 50 -125 24 -66
-MAP SouthAmerica SouthAmerica.png 13 -82 -56 -34
-MAP Belgium Belgium.png 51.6 2.5 49.4 6.6
-MAP France France.png 52 -5 42 9
-MAP Germany Germany.png 56 5 47 16
-MAP Italy Italy.png 48 6 35 19
-MAP Netherlands Netherlands.png 53.6 3.3 50.7 7.3
-MAP UK UK.png 59 -11 49 2
-# Calculated via trial and error.
-PROJECTION USA50 ALBER 703.18 30.8 45.5 21.7 -99.9 232 390
-PROJECTION USA100 ALBER 1406.35 30.8 45.5 21.7 -99.9 464 781
-PROJECTION USA ALBER 1406.35 30.8 45.5 21.7 -99.9 464 781
-PROJECTION USA200 ALBER 2812.7 30.8 45.5 21.7 -99.9 929 1561
+++ /dev/null
-OVERVIEW
-
-This document describes the format of the .mapinfo configuration file,
-which specifies the maps (and their projection parameters) available to
-users of plot-latlong.
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-SYNTAX
-
-The .mapinfo file has a simple line-oriented syntax. Each line
-independently specifies some piece of information, and the order of the
-lines is unimportant. Blank lines and lines starting with '#', which
-may be preceded by whitespace, are ignored. All other lines must have
-the syntax described below.
-
-We use a few conventions in the following description of the syntax.
-Placeholders are denoted by words enclosed in angle brackets (e.g.,
-<map-name>). All other words are literals that should be included
-verbatim. The order of the words on each line is significant. One or
-more whitespace characters should separate the individual words on each line.
-
-1) map definitions:
-
- MAP <map-name> <image-path> <top-lat> <top-long> <bot-lat> <bot-long>
-
- MAP World World100.png 90 -170 -90 190
-
-These lines specify a map that is available to the user and supply some
-basic attributes.
-
-The values are
-
- <map-name> -- the name of the map; this is the name used for the '-m'
- command line argument; the name must consist of letters,
- digits, and underscores--no spaces are allowed
-
- <image-path> -- the name of the PNG file containing the map image; the
- path is relative to the location of the .mapimages directory,
- so in most cases, the path can be a simple filename such as
- "World100.png"
-
- <top-lat>
- <top-long> -- the lat/long of the top-left corner of the map image in
- decimal degrees
-
- <bot-lat>
- <bot-long> -- the lat/long of the bottom-right corner of the map image in
- decimal degrees
-
-
-2) map projection parameters:
-
- PROJECTION <map-name> <projection-name> <projection parameters>
-
- PROJECTION USA50 ALBER 704.0 30.8 45.5 21.86 -99.9 232 388
-
-These lines specify the parameters for nonlinear map projections. In
-contrast, the values given in MAP lines are sufficient for linear map
-projections.
-
-The values are
-
- <map-name> -- the name of the map; this value should match the name used
- in the corresponding MAP line
-
- <projection-name> -- the name of the nonlinear projection that will be
- applied to the map; currently, if maps are not linear, they may
- have one nonlinear projection specified for them; multiple
- nonlinear projections for the same map are not allowed
-
- <projection parameters> -- a variable set of values that provides the
- actual parameters for the map projection; see below for details
-
-
-The following describes the supported projections and their parameters.
-Only one projection is currently supported:
-
- ALBER -- an Alber/Lambert projection; this is used by the USA maps
- included in the distribution
-
- See the publication "Map Projections Used by the U.S. Geological
- Survey Bulletin 1532" for details about this projection.
-
- parameters:
-
- <R> <phi_1> <phi_2> <phi_0> <lambda_0> <false-easting> <false-northing>
-
- where
-
- <R> -- radius of sphere
- <phi_1> -- standard parallel (lower)
- <phi_2> -- standard parallel (upper)
- <phi_0> -- origin latitude
- <lambda_0> -- origin longitude
- <false-easting> -- the false easting amount
- <false-northing> -- the false northing amount
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-TIPS & TRICKS
-
-Creating maps at different scales is both useful and relatively easy.
-The following describes the steps for creating maps at different scales
-using existing maps:
-
- 1) Use an image editing tool/package like ImageMagick or NetPBM to create
- a map image at a different size; e.g.,
-
- convert -scale '50%' .mapimages/World100.png .mapimages/World50.png
-
- would create a half-sized image using the 'convert' tool of ImageMagick.
-
- 2) Add a MAP line to .mapinfo; specifically, copy the MAP line of the
- source map and change the map name and image path--don't change the
- lat/long parameters; e.g.,
-
- MAP World100 World100.png 90 -170 -90 190
- => MAP World50 World50.png 90 -170 -90 190
-
- 3) For maps created with nonlinear projections, add a PROJECTION line to
- .mapinfo; again, you may simply copy and tweak the PROJECTION line of
- the source map; e.g.,
-
- PROJECTION USA50 ALBER 704.0 30.8 45.5 21.86 -99.9 232 388
- PROJECTION USA100 ALBER 1408.0 30.8 45.5 21.86 -99.9 464 776
- PROJECTION USA200 ALBER 2816.0 30.8 45.5 21.86 -99.9 928 1552
-
- For the Alber/Lambert projection, you need only change the <R>,
- <false-easting>, and <false-northing> parameters. These values change
- in direct proportion to the change in size of the image itself. For
- example, if the size is halved, then these parameter values should be
- halved; if the size is doubled, then the values should be doubled.
- In the above example, USA100 is the USA map at 100%; USA50 and USA200
- represent images at 50% and 200%, respectively.
+++ /dev/null
- plot-latlong
-
- version 0.3
-
- Jun 10, 2005
-
- (c) 2003,2004,2005 CAIDA/UCSD
-
- (http://www.caida.org/tools/visualization/plot-latlong/index.xml)
-
- plot-latlong-info@caida.org
- plot-latlong-bugs@caida.org
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-CHANGES
-
- * v0.3 released Jun 10, 2005
-
- - added -i option to specify location of mapinfo file.
-
- * v0.2 released Apr 6, 2004
-
- - added test-gd script for testing the GD installation
-
- * v0.1 released Oct 3, 2003 -- initial release
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-DESCRIPTION
-
-plot-latlong is a small command line tool written in perl for plotting
-points on geographic maps given a list of latitude/longitude (lat/long)
-pairs. This is aimed at situations in which
-
- * a moderate amount of accuracy and precision is sufficient
- * a large number of locations need to be plotted (tens of thousands of
- locations can be easily handled)
- * the plotting needs to be automatable (from a shell script, for example)
- * a lightweight tool (both small and with few dependencies) that just plots
- points is sufficient
- * ease of modification is important (so that special requirements can be
- met)
-
-plot-latlong can handle nonlinear map projections (currently the
-Alber/Lambert projection) and is intentionally minimalistic so that it can
-serve as a building block. Users can build upon it in three ways: (1) add
-new maps, (2) run the output images through packages like NetPBM to add
-titles, etc., and (3) modify the source to change how points are drawn, to
-add labels, etc. plot-latlong can also be used to simply compute the
-mapping from lat/long to pixel coordinates (for a given map). These pixel
-coordinates can then be fed to other programs to draw more elaborate
-pictures.
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-IMPLEMENTED FEATURES
-
-The list of implemented features is intentionally short:
-
- * drawing points at a user-specified size
- * printing out just the pixel coordinates of input lat/long pairs
- * support for linear projections (the relationship between pixels
- and lat/long values is linear)
- * support for the Alber/Lambert nonlinear projection
-
-The distribution includes over two dozen maps, covering the continents
-and several country groups. Users can also supply maps to use, so
-long as the projection type is supported and the projection parameters
-are known.
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-CAVEATS
-
-plot-latlong is unsuitable for applications demanding high accuracy.
-Accuracy is likely no better than 5-10 miles--and even this is merely a
-shot in the dark, since we're not in a position to rigorously determine the
-accuracy of the generated plots. The following factors contribute to
-increased inaccuracy:
-
- * the relative coarseness of the supplied maps
- * unverified projection parameters for the supplied maps
- * the USA maps, which use the Alber/Lambert projection, have parameters
- calibrated by eye
- * the geodetic datum assumed by the supplied maps is unknown to us
- (http://www.colorado.edu/geography/gcraft/notes/datum/datum_f.html)
-
- + lat/long coordinate values are not universal; values are always
- specified in some system, the datum, and mismatches in the assumed
- datum can lead to the specification of physical locations that are
- separated by as much as 1km
-
- + to assess whether plot-latlong will be sufficient for your needs,
- you might try comparing the results with those from the
- Tiger Map Server (http://tiger.census.gov/cgi-bin/mapbrowse-tbl/)
- and MapQuest (http://www.mapquest.com/maps/latlong.adp).
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-REQUIREMENTS
-
-The requirements for running plot-latlong are:
-
- * UNIX-like operating system
- * perl (http://www.perl.com)
- * GD.pm (http://stein.cshl.org/WWW/software/GD/), which in turn requires
- (see the README of GD.pm):
-
- + the gd graphics library (http://www.boutell.com/gd/)
- + the PNG graphics library (http://www.libpng.org/pub/png/libpng.html)
- + the zlib compression library (http://www.gzip.org/zlib/)
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-INSTALLATION
-
-No installation, per se, is required, but for the greatest convenience,
-it is best to copy some files to your home directory, as in the following:
-
- cp plot-latlong $HOME/bin
- cp -R .mapinfo .mapimages $HOME
-
-Assuming $HOME/bin is in your PATH, you can now run plot-latlong from
-anywhere.
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-USAGE
-
-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. Each coordinate should be a
-decimal value, with negative values indicating south or west. 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
-
- (NOTE: Points drawn at the default size of 1 pixel may be hard to see
- when only a few points are plotted. Use '-s 10' when plotting
- a small number of points.)
-
- -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 $HOME).
-
-Examples:
-
-$ cat locations.txt | ./plot-latlong >plot.png
-
-$ ./plot-latlong -m USA -s 10 >plot.png <<EOF
-# san diego
-32.8155594 -117.1361008
-
-# miami, fl
-25.7707844 -80.2112045
-
-# new york, ny
-40.6691055 -73.9439468
-EOF
-
-$ cat locations.txt | ./plot-latlong -c >/dev/null 2>xy.txt
-$ head xy.txt
-33.58 -86.52 250.44 168.946555555556
-33.59 -86.96 249.12 168.916611111111
-...
-
-
-NOTE: You may safely ignore the following warning:
-
- gd-png warning: alpha channel not supported
-
- This warning says that the input map image had transparency information,
- which some GD versions don't support. None of the map images included
- in the distribution have transparency, but maps of your own may.
- In such cases, use an image editing tool to remove the transparency
- information.
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-ACKNOWLEDGMENTS
-
-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.
-
-
-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-LICENSE
-
-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."
+++ /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 / commitdiff
