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<?php
/**
* staticMapLite 0.3.1
*
* 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 $maxWidth = 1024;
protected $maxHeight = 1024;
protected $tileSize = 256;
protected $tileSrcUrl = array('mapnik' => 'http://tile.openstreetmap.org/{Z}/{X}/{Y}.png',
'osmarenderer' => 'http://otile1.mqcdn.com/tiles/1.0.0/osm/{Z}/{X}/{Y}.png',
'cycle' => 'http://a.tile.opencyclemap.org/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'
),
// http://svn.openstreetmap.org/sites/other/StaticMap/symbols/0.png
'ojw' => array('regex' => '/^bullseye$/',
'extension' => '.png',
'shadow' => false,
'offsetImage' => '-20,-20',
'offsetShadow' => false
)
);
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 $_GET;
if (!empty($_GET['show'])) {
$this->parseOjwParams();
}
else {
$this->parseLiteParams();
}
}
public function parseLiteParams()
{
// 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) = explode(',', $_GET['center']);
$this->lat = floatval($this->lat);
$this->lon = floatval($this->lon);
// get size from GET paramter
if ($_GET['size']) {
list($this->width, $this->height) = explode('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 = $this->maxHeight;
}
if (!empty($_GET['markers'])) {
$markers = explode('|', $_GET['markers']);
foreach ($markers as $marker) {
list($markerLat, $markerLon, $markerType) = explode(',', $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 parseOjwParams()
{
$this->lat = floatval($_GET['lat']);
$this->lon = floatval($_GET['lon']);
$this->zoom = intval($_GET['z']);
$this->width = intval($_GET['w']);
if ($this->width > $this->maxWidth) $this->width = $this->maxWidth;
$this->height = intval($_GET['h']);
if ($this->height > $this->maxHeight) $this->height = $this->maxHeight;
if (!empty($_GET['mlat0'])) {
$markerLat = floatval($_GET['mlat0']);
if (!empty($_GET['mlon0'])) {
$markerLon = floatval($_GET['mlon0']);
$this->markers[] = array('lat' => $markerLat, 'lon' => $markerLon, 'type' => "bullseye");
}
}
}
public function lonToTile($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]);
$tileData = $this->fetchTile($url);
if ($tileData) {
$tileImage = imagecreatefromstring($tileData);
} else {
$tileImage = imagecreate($this->tileSize, $this->tileSize);
$color = imagecolorallocate($tileImage, 255, 255, 255);
@imagestring($tileImage, 1, 127, 127, 'err', $color);
}
$destX = ($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) = explode(",", $markerPrototype['offsetImage']);
}
$markerShadow = $markerPrototype['shadow'];
if ($markerShadow) {
list($markerShadowOffsetX, $markerShadowOffsetY) = explode(",", $markerPrototype['offsetShadow']);
}
}
}
}
// check required files or set default
if ($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 . "/" . $this->maptype . "/" . $this->zoom . "/cache_" . substr($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($ch);
if ($tile && $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();