Google maps support

function get($url,$head,$timeout,$useragent){

		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_HEADER, $head);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
		curl_setopt($ch, CURLOPT_TIMEOUT,$timeout);

		curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
		$r=curl_exec($ch);
		curl_close($ch);
		return $r;
}
function save_image($x,$y,$z,$filename){
	$img=get("http://khm0.google.at/kh/v=67&x=$x&y=$y&z=$z",0,10,"Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8");
	$f=fopen($filename,"w");
	fwrite($f,$img);
	fclose($f);
	}

save_image($x,$y,$zoom,"data/$zoom/$x-$y-$zoom.jpg");}}

    function ToNormalisedPixelCoords($lat,$lng)
    {
      // first convert to Mercator projection
      // first convert the lat lon to mercator coordintes.
      if ($lng > 180.0)
      {
        $lng -= 360.0;
      }

      $lng = (180.0 + $lng) / 360.0;
      $lat = 0.5 - log(tan((pi() / 4.0) + ((pi() * $lat) / (2.0 * 180.0)))) / (2.0 * pi());

	  $ret[]=$lng;
	  $ret[]=$lat;
	  return $ret;    
}
function ToTileXY($lng,$lat,$zoom)
    {
      $in=ToNormalisedPixelCoords($lat,$lng);
	  
	  $lng=$in[0];
	  $lat=$in[1];
	  
      $scale = 1 << $zoom;

      $x = (int)($lng * $scale);
      $y = (int)($lat * $scale);

	  $r['x']=$x;
	  $r['y']=$y;
	  return $r;
    }

$center=ToTileXY($lng,$lat,$zoom);
$x=$center['x'];
$y=$center['y'];

function GetTileRect($x,$y,$zoom){// out double topLat, out double leftLong, out double bottomLat, out double rightLong)

      $tilesAtThisZoom = 1 << $zoom;
      $lngWidth = 360 / $tilesAtThisZoom; // width in degrees longitude
      $leftLong = -180.0 + ($x * $lngWidth); // left edge in degrees longitude
      $rightLong = $leftLong + $lngWidth;

      $latHeightMerc = 1.0 / $tilesAtThisZoom; // height in "normalized" mercator 0,0 top left
      $topLatMerc = $y * $latHeightMerc; // top edge in "normalized" mercator 0,0 top left
      $bottomLatMerc = $topLatMerc + $latHeightMerc;

      
	  $bottomLat = (180.0 / pi()) * ((2.0 * atan(exp(pi() * (1.0 - (2.0 * $bottomLatMerc))))) - (pi() / 2.0));

      $topLat =    (180.0 / pi()) * ((2.0 * atan(exp(pi() * (1.0 - (2.0 * $topLatMerc))))) - (pi() / 2.0));
	  

	  
	  $cord[0]=$leftLong;
	  $cord[1]=$rightLong;
	  $cord[2]=$topLat;
	  $cord[3]=$bottomLat;
	  return $cord;
    }
$cord=GetTileRect($x,$y,$zoom);

$gesamt=imagecreatetruecolor((256*(($anz*2)+1)),(256*(($anz*2)+1)));

for($i=$center['x']-$anz;$i<=$center['x']+$anz;$i++){
for($j=$center['y']-$anz;$j<=$center['y']+$anz;$j++){

	$im = imagecreatefromjpeg("data/$zoom/$i-$j-$zoom.jpg");
	$dst_x=($i-$center['x']+($anz))*256;
	$dst_y=($j-$center['y']+($anz))*256;
	imagecopy  ($gesamt,$im,$dst_x,$dst_y,0,0,256,256);//, int $src_w  , int $src_h  )
	imagedestroy($im);
	


}}

function circle($im,$lat,$lng,$cx,$cy,$anz,$wayp){
	global $zoom;
	
	$center=ToTileXY($lng,$lat,$zoom);
	
	$new_x=256*($center['x']-$cx)+($anz*256);
	$new_y=256*($center['y']-$cy)+($anz*256);


	$rect=GetTileRect($center['x'],$center['y'],$zoom);//left - right - top - bottom

	$height=$rect[2]-$rect[3];
	$width=$rect[1]-$rect[0];

	$y=(($rect[2]-$lat)/$height)*256;
	$x=256-(($rect[1]-$lng)/$width)*256;

	if(substr($wayp,0,2)=="GC"){imagefilledellipse($im,$x+$new_x,$y+$new_y,10,10,imagecolorallocate($im,255,0,0));
	
	imagefilledrectangle($im,$x+$new_x+12,$y+$new_y-8,$x+$new_x+80,$y+$new_y+8,imagecolorallocate($im,255,255,255));
	imagestring($im,5,$x+$new_x+12,$y+$new_y-8,$wayp,imagecolorallocate($im,255,0,0));}
}

foreach ($xml->cachelist[0]->CACHE as $cache) {

	$c_lat=floatval(str_replace(",",".",$cache['lat']));
	$c_lon=floatval(str_replace(",",".",$cache['lon']));
   	circle($gesamt,$c_lat,$c_lon,$center['x'],$center['y'],$anz,$cache['wayp']);
	echo $cache['lat'].",".$cache['lon']."<br>";
   }

1: drehung y (=0.0)
2: latitude/pixel
3:longitude/pixel
4:drehung x (=0.0)
5:latutude oben
6:longitude links
7:latitude unten
8:longitude rechts
9:LEER