| <?php | |
| /** | |
| * staticMapLite 0.02 | |
| * | |
| * Copyright 2009 Gerhard Koch | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| * | |
| * @author Gerhard Koch <gerhard.koch AT ymail.com> | |
| * | |
| * 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 $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 $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); | |
| $this->height = intval($this->height); | |
| } | |
| if($_GET['markers']){ | |
| $markers = split('%7C|\|',$_GET['markers']); | |
| foreach($markers as $marker){ | |
| list($markerLat, $markerLon, $markerImage) = split(',',$marker); | |
| $markerLat = floatval($markerLat); | |
| $markerLon = floatval($markerLon); | |
| $markerImage = basename($markerImage); | |
| $this->markers[] = array('lat'=>$markerLat, 'lon'=>$markerLon, 'image'=>$markerImage); | |
| } | |
| } | |
| 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, $this->tileSize); | |
| } | |
| } | |
| } | |
| public function placeMarkers(){ | |
| foreach($this->markers as $marker){ | |
| $markerLat = $marker['lat']; | |
| $markerLon = $marker['lon']; | |
| $markerImage = $marker['image']; | |
| $markerIndex++; | |
| $markerFilename = $markerImage?(file_exists($this->markerBaseDir.'/'.$markerImage.".png")?$markerImage:'lightblue'.$markerIndex):'lightblue'.$markerIndex; | |
| if(file_exists($this->markerBaseDir.'/'.$markerFilename.".png")){ | |
| $markerImg = imagecreatefrompng($this->markerBaseDir.'/'.$markerFilename.".png"); | |
| } else { | |
| $markerImg = imagecreatefrompng($this->markerBaseDir.'/lightblue1.png'); | |
| } | |
| $destX = floor(($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))); | |
| $destY = $destY - imagesy($markerImg); | |
| imagecopy($this->image, $markerImg, $destX, $destY, 0, 0, imagesx($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(); | |
| ?> |