■グーグルマップを壁紙にしてみる

10/18 改訂

グーグルマップの航空写真をつなげて一枚にするスクリプト。

なお、取得した画像の著作権はグーグル他各社が保持しています。

ご利用は計画的に私的範囲でどうぞご利用ください。

#!/usr/bin/perl

use strict;
use warnings;
use Getopt::Long;
use LWP::UserAgent;
use GD;

my $cmdline = join(" ", $0, @ARGV);
my $usage = "usage: $0 -sx=116423 -sy=51603 -ex=116426 -ey=51605 -dx=4 -dy=3 -z=17 -size=300 -get=30 -dir=cache -output=output.jpg -nodebug";
my ($sx, $sy) = (0, 0);
my ($ex, $ey) = (0, 0);
my ($dx, $dy) = (4, 3);
my $z = 17;
my $size = 300;
my $get = 30;
my $dir = "cache";
my $output = "output.jpg";
my $debug = 0;
GetOptions("sx=i" => \$sx, "sy=i" => \$sy,
	   "ex=i" => \$ex, "ey=i" => \$ey,
	   "dx=i" => \$dx, "dy=i" => \$dy,
	   "z=i" => \$z,
	   "size=i" => \$size, "get=i" => $get,
	   "dir=s" => \$dir, "output=s" => \$output,
	   "debug!" => \$debug) or die "$usage\nDied";
if ($ex == 0) {
    $ex = $sx + $dx;
} else {
    $ex++;
    $dx = $ex - $sx;
}
if ($ey == 0) {
    $ey = $sy + $dy;
} else {
    $ey++;
    $dy = $ey - $sy;
}
$sx>0 and $dx>0 and $sy>0 and $dy>0 and $z>0 and $dir and $output
    or die "$usage\nBad arguments";
$dx*$dy > $size and die "Getting too large.";

$debug and print "debug: mkdir $dir\n";
mkdir $dir;
-d $dir or die "can't make dir $dir: $!";

my $base = sprintf("http://khm%d.google.co.jp/kh/v=46&z=%d", int(rand(4)), $z);
my $ua = LWP::UserAgent->new;
printf "now get %d images...\n", $dx*$dy;
for (my $x=$sx; $x < $ex; $x++) {
    for (my $y=$sy; $y < $ey; $y++) {
	my $file = sprintf("%s/%02dz%06dx%06d.jpg", $dir, $z, $x, $y);
	$debug and print "debug: check of $file\n";
	-s $file and next;
	--$get < 0 and last;
	my $req = HTTP::Request->new(GET=>+"$base&x=$x&y=$y");
	$debug and print "debug: fetch from ".$req->uri."\n";
	my $res = $ua->request($req);
	unless ($res->is_success) {
	    print "fail fetch from $file: ", $res->status_line, "\n";
	    next;
	}
	if (open(my $fh, ">", $file)) {
	    $debug and print "debug: write of $file\n";
	    binmode $fh;
	    print $fh $res->content;
	    close $fh;
	} else {
	    print "fail open in $file: $!\n";
	}
    }
}
$get < 0 and print "reach the getting limit, skip after all.\n";

printf "creating %dX%d image...\n", 256*$dx, 256*$dy;
my $image = new GD::Image(256*$dx, 256*$dy);
for (my $x=$sx; $x < $ex; $x++) {
    for (my $y=$sy; $y < $ey; $y++) {
	my $file = sprintf("%s/%02dz%06dx%06d.jpg", $dir, $z, $x, $y);
	$debug and print "debug: check of $file\n";
	-s $file or next;
	$debug and print "debug: read of $file\n";
	my $part = GD::Image->newFromJpeg($file);
	$debug and print "debug: image copy\n";
	$image->copy($part, 256*($x-$sx), 256*($y-$sy), 0, 0, 256, 256);
    }
}
#$image->string(gdSmallFont, 0, 0, $cmdline, $image->colorAllocate(255, 255, 255));
open(my $fh, ">", $output) or die "fail open $output: $!";
$debug and print "debug: write of $output\n";
binmode $fh;
print $fh $image->jpeg();
close $fh;

例えば秋葉原とか

perl gmwall.pl -sx=116423 -sy=51603 -ex=116427 -ey=51606

駅だけとか

perl gmwall.pl -sx=465701 -sy=206420 -ex=465705 -ey=206423 -z=19

使う数値はfirebugなどで拾ってください。

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