mgrubinger/PHPMapTileDownloader.php

## PHPMapTileDownloader.php
<!doctype html>
<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title>PHPMapTileDownloader</title>
    <style>
		body {
			font-family: 'Helvetica', sans-serif;
			text-align: center;
			margin-top: 20px;
		}
    </style>
</head>
<body>
    <h1>PHPMapTileDownloader</h1>

<?php


/***************************
 ***************************
 *** USER CONFIGURATION ****
 ***************************
 **************************/

	// define bounding box
	$north 	= 48.22376;			// lat north
	$east 	= 16.40808;			// lon east
	$south 	= 48.1844;			// lat south
	$west 	= 16.34079;			// lon west
	$zoomlevels = array(14); 	// zoomlevels - e.g. array(15,16,17)
	$tileserver = "https://mytileserver.myserver.com/{z}/{x}/{y}.png"; 	// tileserver - e.g. "https://mytileserver.myserver.com/{z}/{x}/{y}.png";
	$output_dir = "tiles";		// output directory - e.g. "tiles"
	$dry_run = true;			// dry run: do not download files, only output names
	$skip_existing_files = true; 	// skip existing files?

// end of user config


// PHP-Config
error_reporting(E_ALL | E_STRICT);
ini_set('display_errors','On');

// create output dir
if(!file_exists($output_dir)) {
	mkdir($output_dir);
	_log('Directory created: ' . $output_dir);
}

// array to store all required tiles(-urls)
$all_tiles = array();


///// get all the tiles
// loop zoomlevels
foreach ($zoomlevels as $key => $z) {

	// get topleft tile number
	$topleft_x = get_tile_x($west, $z)-1; 	// lon
	$topleft_y = get_tile_y($north, $z)-1;	// lat

	// get bottomright tile number
	$bottomleft_x = get_tile_x($east, $z)+1;  // lon
	$bottomleft_y = get_tile_y($south, $z)+1; // lat

	// loop x-axis
	for ($x=$topleft_x; $x <= $bottomleft_x; $x++) {
		// loop y-axis
		for ($y=$topleft_y; $y <= $bottomleft_y; $y++) {
			$new_url = preg_replace('/\{z\}/', $z, $tileserver);
			$new_url = preg_replace('/\{x\}/', $x, $new_url);
			$new_url = preg_replace('/\{y\}/', $y, $new_url);
			// define tile object
			$the_tile = array('url' => $new_url, 'z' => $z, 'x' => $x, 'y' => $y);
			array_push($all_tiles, $the_tile);
		}
	}
}

_log("Downloading " . count($all_tiles) . " Tiles...");


//// DOWNLOAD FILES
// loop all files
$file_downloaded_counter = 0;
$file_skipped_counter = 0;
foreach($all_tiles as $tile) {
    $tile_url = trim($tile['url']);
    $filename = $tile['y'] . ".png";

    // check if directory exists -> otherwise create it
    $destination_dir = $output_dir . "/" . $tile['z'] . "/" . $tile['x'];
    if(!file_exists($destination_dir)) mkdir($destination_dir, 0777, true);

    $destination_file = $destination_dir . "/" . $filename;

    // download the file
    if(!$dry_run) {
    	// define if file should be downloaded (config->skip_existing_files)
    	$download_file = true;
    	if($skip_existing_files && file_exists($destination_file)) $download_file = false;

    	if($download_file) {
	    	$img = file_get_contents($tile_url);
			$fp = fopen($destination_file, 'w');
			fwrite($fp, $img);
			fclose($fp);
			$file_downloaded_counter++;
    	}
    	else $file_skipped_counter++;

    }
    else {
   		// dry run
   		_log($file_downloaded_counter . ": " . $tile_url);
		$file_downloaded_counter++;
    }
}

_log("<b>Done</b>. " . $file_downloaded_counter . " Tiles have been downloaded. (" . $file_skipped_counter . " tiles skipped – already existed.)");


// --- HELPER FUNCTIONS --- //

/**
 * Simple Log Output
 *
 * @param string     $log_text     The text to output
 */
function _log($log_text) {
	echo $log_text . "<br/>";
}

/**
 * Get the x value for a tile at a certain longitude at a certain zoomlevel
 *
 * @param number     $lon     The longitude
 * @param number     $zoom    The zoomlevel
 *
 * @return number
 */
function get_tile_x($lon, $zoom) {
	$xtile = floor((($lon + 180) / 360) * pow(2, $zoom));
	return $xtile;
}

/**
 * Get the y value for a tile at a certain latitude at a certain zoomlevel
 *
 * @param number     $lat     The latitude
 * @param number     $zoom    The zoomlevel
 *
 * @return number
 */
function get_tile_y($lat, $zoom) {
	$ytile = floor((1 - log(tan(deg2rad($lat)) + 1 / cos(deg2rad($lat))) / pi()) /2 * pow(2, $zoom));
	return $ytile;
}


/**
 * Remove a directory recursively
 * (from php.net)
 *
 * @param string     $dir     The directory path
 *
 * @return bool

 */
function delTree($dir) {
    $files = array_diff(scandir($dir), array('.','..'));
    foreach ($files as $file) {
        (is_dir($dir.'/'.$file)) ? delTree($dir.'/'.$file) : unlink($dir.'/'.$file);
    }
    return rmdir($dir);
}

?>


</body>
</html>
	<!doctype html>
	<html lang="en-US">
	<head>
	<meta charset="UTF-8">
	<title>PHPMapTileDownloader</title>
	<style>
	body {
	font-family: 'Helvetica', sans-serif;
	text-align: center;
	margin-top: 20px;
	}
	</style>
	</head>
	<body>
	<h1>PHPMapTileDownloader</h1>

	<?php


	/***************************
	***************************
	* USER CONFIGURATION **
	***************************
	**************************/

	// define bounding box
	$north = 48.22376; // lat north
	$east = 16.40808; // lon east
	$south = 48.1844; // lat south
	$west = 16.34079; // lon west
	$zoomlevels = array(14); // zoomlevels - e.g. array(15,16,17)
	$tileserver = "https://mytileserver.myserver.com/{z}/{x}/{y}.png"; // tileserver - e.g. "https://mytileserver.myserver.com/{z}/{x}/{y}.png";
	$output_dir = "tiles"; // output directory - e.g. "tiles"
	$dry_run = true; // dry run: do not download files, only output names
	$skip_existing_files = true; // skip existing files?

	// end of user config





	// PHP-Config
	error_reporting(E_ALL \| E_STRICT);
	ini_set('display_errors','On');

	// create output dir
	if(!file_exists($output_dir)) {
	mkdir($output_dir);
	_log('Directory created: ' . $output_dir);
	}

	// array to store all required tiles(-urls)
	$all_tiles = array();


	///// get all the tiles
	// loop zoomlevels
	foreach ($zoomlevels as $key => $z) {

	// get topleft tile number
	$topleft_x = get_tile_x($west, $z)-1; // lon
	$topleft_y = get_tile_y($north, $z)-1; // lat

	// get bottomright tile number
	$bottomleft_x = get_tile_x($east, $z)+1; // lon
	$bottomleft_y = get_tile_y($south, $z)+1; // lat

	// loop x-axis
	for ($x=$topleft_x; $x <= $bottomleft_x; $x++) {
	// loop y-axis
	for ($y=$topleft_y; $y <= $bottomleft_y; $y++) {
	$new_url = preg_replace('/\{z\}/', $z, $tileserver);
	$new_url = preg_replace('/\{x\}/', $x, $new_url);
	$new_url = preg_replace('/\{y\}/', $y, $new_url);
	// define tile object
	$the_tile = array('url' => $new_url, 'z' => $z, 'x' => $x, 'y' => $y);
	array_push($all_tiles, $the_tile);
	}
	}
	}

	_log("Downloading " . count($all_tiles) . " Tiles...");


	//// DOWNLOAD FILES
	// loop all files
	$file_downloaded_counter = 0;
	$file_skipped_counter = 0;
	foreach($all_tiles as $tile) {
	$tile_url = trim($tile['url']);
	$filename = $tile['y'] . ".png";

	// check if directory exists -> otherwise create it
	$destination_dir = $output_dir . "/" . $tile['z'] . "/" . $tile['x'];
	if(!file_exists($destination_dir)) mkdir($destination_dir, 0777, true);

	$destination_file = $destination_dir . "/" . $filename;

	// download the file
	if(!$dry_run) {
	// define if file should be downloaded (config->skip_existing_files)
	$download_file = true;
	if($skip_existing_files && file_exists($destination_file)) $download_file = false;

	if($download_file) {
	$img = file_get_contents($tile_url);
	$fp = fopen($destination_file, 'w');
	fwrite($fp, $img);
	fclose($fp);
	$file_downloaded_counter++;
	}
	else $file_skipped_counter++;

	}
	else {
	// dry run
	_log($file_downloaded_counter . ": " . $tile_url);
	$file_downloaded_counter++;
	}
	}

	_log("<b>Done</b>. " . $file_downloaded_counter . " Tiles have been downloaded. (" . $file_skipped_counter . " tiles skipped – already existed.)");



	// --- HELPER FUNCTIONS --- //

	/**
	* Simple Log Output
	*
	* @param string $log_text The text to output
	*/
	function _log($log_text) {
	echo $log_text . "<br/>";
	}

	/**
	* Get the x value for a tile at a certain longitude at a certain zoomlevel
	*
	* @param number $lon The longitude
	* @param number $zoom The zoomlevel
	*
	* @return number
	*/
	function get_tile_x($lon, $zoom) {
	$xtile = floor((($lon + 180) / 360) * pow(2, $zoom));
	return $xtile;
	}

	/**
	* Get the y value for a tile at a certain latitude at a certain zoomlevel
	*
	* @param number $lat The latitude
	* @param number $zoom The zoomlevel
	*
	* @return number
	*/
	function get_tile_y($lat, $zoom) {
	$ytile = floor((1 - log(tan(deg2rad($lat)) + 1 / cos(deg2rad($lat))) / pi()) /2 * pow(2, $zoom));
	return $ytile;
	}


	/**
	* Remove a directory recursively
	* (from php.net)
	*
	* @param string $dir The directory path
	*
	* @return bool

	*/
	function delTree($dir) {
	$files = array_diff(scandir($dir), array('.','..'));
	foreach ($files as $file) {
	(is_dir($dir.'/'.$file)) ? delTree($dir.'/'.$file) : unlink($dir.'/'.$file);
	}
	return rmdir($dir);
	}

	?>


	</body>
	</html>