* * USAGE: * * staticmap.php?center=40.714728,-73.998672&zoom=14&size=512x512&maptype=mapnik&markers=40.702147,-74.015794,blues|40.711614,-74.012318,greeng|40.718217,-73.998284,redc * */ error_reporting(0); ini_set('display_errors','off'); Class staticMapLite { protected $maxWidth = 1024; protected $maxHeight = 1024; protected $tileSize = 256; protected $tileSrcUrl = array( 'mapnik' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png', 'osmarenderer' => 'http://c.tah.openstreetmap.org/Tiles/tile/{Z}/{X}/{Y}.png', 'cycle' => 'http://c.andy.sandbox.cloudmade.com/tiles/cycle/{Z}/{X}/{Y}.png' ); protected $tileDefaultSrc = 'mapnik'; protected $markerBaseDir = 'images/markers'; protected $osmLogo = 'images/osm_logo.png'; protected $markerPrototypes = array(// found at http://www.mapito.net/map-marker-icons.html 'lighblue' => array('regex'=>'/^lightblue([0-9]+)$/', 'extension'=>'.png', 'shadow'=>false, 'offsetImage'=>'0,-19', 'offsetShadow'=>false ), // openlayers std markers 'ol-marker'=> array('regex'=>'/^ol-marker(|-blue|-gold|-green)+$/', 'extension'=>'.png', 'shadow'=>'../marker_shadow.png', 'offsetImage'=>'-10,-25', 'offsetShadow'=>'-1,-13' ), // taken from http://www.visual-case.it/cgi-bin/vc/GMapsIcons.pl 'ylw'=> array('regex'=>'/^(pink|purple|red|ltblu|ylw)-pushpin$/', 'extension'=>'.png', 'shadow'=>'../marker_shadow.png', 'offsetImage'=>'-10,-32', 'offsetShadow'=>'-1,-13' ) ); protected $useTileCache = true; protected $tileCacheBaseDir = 'cache/tiles'; protected $useMapCache = true; protected $mapCacheBaseDir = 'cache/maps'; protected $mapCacheID = ''; protected $mapCacheFile = ''; protected $mapCacheExtension = 'png'; protected $zoom, $lat, $lon, $width, $height, $markers, $image, $maptype; protected $centerX, $centerY, $offsetX, $offsetY; public function __construct(){ $this->zoom = 0; $this->lat = 0; $this->lon = 0; $this->width = 500; $this->height = 350; $this->markers = array(); $this->maptype = $this->tileDefaultSrc; } public function parseParams(){ global $_GET; // get zoom from GET paramter $this->zoom = $_GET['zoom']?intval($_GET['zoom']):0; if($this->zoom>18)$this->zoom = 18; // get lat and lon from GET paramter list($this->lat,$this->lon) = split(',',$_GET['center']); $this->lat = floatval($this->lat); $this->lon = floatval($this->lon); // get zoom from GET paramter if($_GET['size']){ list($this->width, $this->height) = split('x',$_GET['size']); $this->width = intval($this->width); if($this->width > $this->maxWidth) $this->width = $this->maxWidth; $this->height = intval($this->height); if($this->height > $this->maxHeight) $this->height = $this->maxHeight; } if($_GET['markers']){ $markers = split('%7C|\|',$_GET['markers']); foreach($markers as $marker){ list($markerLat, $markerLon, $markerType) = split(',',$marker); $markerLat = floatval($markerLat); $markerLon = floatval($markerLon); $markerType = basename($markerType); $this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'type'=>$markerType); } } if($_GET['maptype']){ if(array_key_exists($_GET['maptype'],$this->tileSrcUrl)) $this->maptype = $_GET['maptype']; } } public function lonToTile($long, $zoom){ return (($long + 180) / 360) * pow(2, $zoom); } public function latToTile($lat, $zoom){ return (1 - log(tan($lat * pi()/180) + 1 / cos($lat* pi()/180)) / pi()) /2 * pow(2, $zoom); } public function initCoords(){ $this->centerX = $this->lonToTile($this->lon, $this->zoom); $this->centerY = $this->latToTile($this->lat, $this->zoom); $this->offsetX = floor((floor($this->centerX)-$this->centerX)*$this->tileSize); $this->offsetY = floor((floor($this->centerY)-$this->centerY)*$this->tileSize); } public function createBaseMap(){ $this->image = imagecreatetruecolor($this->width, $this->height); $startX = floor($this->centerX-($this->width/$this->tileSize)/2); $startY = floor($this->centerY-($this->height/$this->tileSize)/2); $endX = ceil($this->centerX+($this->width/$this->tileSize)/2); $endY = ceil($this->centerY+($this->height/$this->tileSize)/2); $this->offsetX = -floor(($this->centerX-floor($this->centerX))*$this->tileSize); $this->offsetY = -floor(($this->centerY-floor($this->centerY))*$this->tileSize); $this->offsetX += floor($this->width/2); $this->offsetY += floor($this->height/2); $this->offsetX += floor($startX-floor($this->centerX))*$this->tileSize; $this->offsetY += floor($startY-floor($this->centerY))*$this->tileSize; for($x=$startX; $x<=$endX; $x++){ for($y=$startY; $y<=$endY; $y++){ $url = str_replace(array('{Z}','{X}','{Y}'),array($this->zoom, $x, $y), $this->tileSrcUrl[$this->maptype]); $tileImage = imagecreatefromstring($this->fetchTile($url)); $destX = ($x-$startX)*$this->tileSize+$this->offsetX; $destY = ($y-$startY)*$this->tileSize+$this->offsetY; imagecopy($this->image, $tileImage, $destX, $destY, 0, 0, $this->tileSize, $this->tileSize); } } } public function placeMarkers(){ // loop thru marker array foreach($this->markers as $marker){ // set some local variables $markerLat = $marker['lat']; $markerLon = $marker['lon']; $markerType = $marker['type']; // clear variables from previous loops $markerFilename = ''; $markerShadow = ''; $matches = false; // check for marker type, get settings from markerPrototypes if($markerType){ foreach($this->markerPrototypes as $markerPrototype){ if(preg_match($markerPrototype['regex'],$markerType,$matches)){ $markerFilename = $matches[0].$markerPrototype['extension']; if($markerPrototype['offsetImage']){ list($markerImageOffsetX, $markerImageOffsetY) = split(",",$markerPrototype['offsetImage']); } $markerShadow = $markerPrototype['shadow']; if($markerShadow){ list($markerShadowOffsetX, $markerShadowOffsetY) = split(",",$markerPrototype['offsetShadow']); } } } } // check required files or set default if($markerFilename == '' || !file_exists($this->markerBaseDir.'/'.$markerFilename)){ $markerIndex++; $markerFilename = 'lightblue'.$markerIndex.'.png'; $markerImageOffsetX = 0; $markerImageOffsetY = -19; } // create img resource if(file_exists($this->markerBaseDir.'/'.$markerFilename)){ $markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename); } else { $markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png'); } // check for shadow + create shadow recource if($markerShadow && file_exists($this->markerBaseDir.'/'.$markerShadow)){ $markerShadowImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerShadow); } // calc position $destX = floor(($this->width/2)-$this->tileSize*($this->centerX-$this->lonToTile($markerLon, $this->zoom))); $destY = floor(($this->height/2)-$this->tileSize*($this->centerY-$this->latToTile($markerLat, $this->zoom))); // copy shadow on basemap if($markerShadow && $markerShadowImg){ imagecopy($this->image, $markerShadowImg, $destX+intval($markerShadowOffsetX), $destY+intval($markerShadowOffsetY), 0, 0, imagesx($markerShadowImg), imagesy($markerShadowImg)); } // copy marker on basemap above shadow imagecopy($this->image, $markerImg, $destX+intval($markerImageOffsetX), $destY+intval($markerImageOffsetY), 0, 0, imagesx($markerImg), imagesy($markerImg)); }; } public function tileUrlToFilename($url){ return $this->tileCacheBaseDir."/".str_replace(array('http://'),'',$url); } public function checkTileCache($url){ $filename = $this->tileUrlToFilename($url); if(file_exists($filename)){ return file_get_contents($filename); } } public function checkMapCache(){ $this->mapCacheID = md5($this->serializeParams()); $filename = $this->mapCacheIDToFilename(); if(file_exists($filename)) return true; } public function serializeParams(){ return join("&",array($this->zoom,$this->lat,$this->lon,$this->width,$this->height, serialize($this->markers),$this->maptype)); } public function mapCacheIDToFilename(){ if(!$this->mapCacheFile){ $this->mapCacheFile = $this->mapCacheBaseDir."/".substr($this->mapCacheID,0,2)."/".substr($this->mapCacheID,2,2)."/".substr($this->mapCacheID,4); } return $this->mapCacheFile.".".$this->mapCacheExtension; } public function mkdir_recursive($pathname, $mode){ is_dir(dirname($pathname)) || $this->mkdir_recursive(dirname($pathname), $mode); return is_dir($pathname) || @mkdir($pathname, $mode); } public function writeTileToCache($url, $data){ $filename = $this->tileUrlToFilename($url); $this->mkdir_recursive(dirname($filename),0777); file_put_contents($filename, $data); } public function fetchTile($url){ if($this->useTileCache && ($cached = $this->checkTileCache($url))) return $cached; $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0"); curl_setopt($ch, CURLOPT_URL, $url); $tile = curl_exec($ch); curl_close($ch); if($this->useTileCache){ $this->writeTileToCache($url,$tile); } return $tile; } public function copyrightNotice(){ $logoImg = imagecreatefrompng($this->osmLogo); imagecopy($this->image, $logoImg, imagesx($this->image)-imagesx($logoImg), imagesy($this->image)-imagesy($logoImg), 0, 0, imagesx($logoImg), imagesy($logoImg)); } public function sendHeader(){ header('Content-Type: image/png'); $expires = 60*60*24*14; header("Pragma: public"); header("Cache-Control: maxage=".$expires); header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT'); } public function makeMap(){ $this->initCoords(); $this->createBaseMap(); if(count($this->markers))$this->placeMarkers(); if($this->osmLogo) $this->copyrightNotice(); } public function showMap(){ $this->parseParams(); if($this->useMapCache){ // use map cache, so check cache for map if(!$this->checkMapCache()){ // map is not in cache, needs to be build $this->makeMap(); $this->mkdir_recursive(dirname($this->mapCacheIDToFilename()),0777); imagepng($this->image,$this->mapCacheIDToFilename(),9); $this->sendHeader(); if(file_exists($this->mapCacheIDToFilename())){ return file_get_contents($this->mapCacheIDToFilename()); } else { return imagepng($this->image); } } else { // map is in cache $this->sendHeader(); return file_get_contents($this->mapCacheIDToFilename()); } } else { // no cache, make map, send headers and deliver png $this->makeMap(); $this->sendHeader(); return imagepng($this->image); } } } $map = new staticMapLite(); print $map->showMap(); ?>