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28 lines
616 B
Plaintext
28 lines
616 B
Plaintext
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#!/usr/bin/perl
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use Math::Trig;
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use strict;
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# http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
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sub getTileNumber {
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my ($lat, $lon, $zoom) = @_;
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my $xtile = int(($lon + 180) / 360 * 2 ** $zoom);
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my $ytile = int((1 - log(tan(deg2rad($lat)) + sec(deg2rad($lat))) / pi) / 2 * 2 ** $zoom);
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return ($xtile, $ytile);
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}
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my ($minlon, $minlat, $maxlon, $maxlat, $z, $x, $y) = @ARGV;
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my ($x1, $y1) = getTileNumber($maxlat, $minlon, $z);
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my ($x2, $y2) = getTileNumber($minlat, $maxlon, $z);
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if ($x >= $x1 && $x <= $x2 && $y >= $y1 && $y <= $y2) {
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while (<STDIN>) {
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print;
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}
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} else {
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while (<STDIN>) {
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}
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}
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