function getMapFromServerDEM($num = 0)
{
global $CONF;
$forceRefresh = 1;
$filename = $this->getMapFilename();
if (is_file($filename) && !$forceRefresh) {
return;
}
// if no file exists do the proccess now
if (!is_file($this->getPointsFilename(1)) || $forceRefresh) {
$this->storeIGCvalues();
}
$lines = file($this->getPointsFilename(1));
// get the normalized with constant time step points array
if (!$lines) {
return;
}
$i = 0;
$jsTrack['max_alt'] = 0;
$jsTrack['min_alt'] = 100000;
$min_lat = 1000;
$max_lat = -1000;
$min_lon = 1000;
$max_lon = -1000;
for ($k = 3; $k < count($lines); $k++) {
$line = trim($lines[$k]);
if (strlen($line) == 0) {
continue;
}
eval($line);
$lon = -$lon;
if ($lat > $max_lat) {
$max_lat = $lat;
}
if ($lat < $min_lat) {
$min_lat = $lat;
}
if ($lon > $max_lon) {
$max_lon = $lon;
}
if ($lon < $min_lon) {
$min_lon = $lon;
}
$lat_arr[] = $lat;
$lon_arr[] = $lon;
}
/*
$max_lat+=0.01;
$max_lon+=0.01;
$min_lat-=0.01;
$min_lon-=0.01;
*/
$totalWidth1 = calc_distance($min_lat, $min_lon, $min_lat, $max_lon);
$totalWidth2 = calc_distance($max_lat, $min_lon, $max_lat, $max_lon);
$totalWidth = max($totalWidth1, $totalWidth2);
$totalHeight1 = calc_distance($min_lat, $min_lon, $max_lat, $min_lon);
$totalHeight2 = calc_distance($min_lat, $max_lon, $max_lat, $max_lon);
$totalHeight = max($totalHeight1, $totalHeight2);
if ($totalWidth > $totalHeight) {
// Landscape style
DEBUG("MAP", 1, "Landscape style <BR>");
DEBUG("MAP", 1, "totalWidth: {$totalWidth}, totalHeight: {$totalHeight}, totalHeight/totalWidth: " . $totalHeight / $totalWidth . "<br>");
// if ( $totalHeight / $totalWidth < 3/4 ) $totalHeight = (3/4) * $totalWidth ;
$mapWidthPixels = 600;
$mapHeightPixels = $mapWidthPixels * ($totalHeight / $totalWidth);
} else {
// portait style
DEBUG("MAP", 1, "Portait style <BR>");
DEBUG("MAP", 1, "totalWidth: {$totalWidth}, totalHeight: {$totalHeight}, totalWidth/totalHeight: " . $totalWidth / $totalHeight . "<br>");
// if ( $totalWidth / $totalHeight < 3/4 ) $totalWidth = (3/4) * $totalHeight ;
$mapWidthPixels = 300;
$mapHeightPixels = $mapWidthPixels * ($totalHeight / $totalWidth);
}
DEBUG("MAP", 1, "MAP min_lat: {$min_lat}, min_lon: {$min_lon}, max_lat: {$max_lat}, max_lon: {$max_lon} <BR>");
require_once dirname(__FILE__) . '/CL_hgt.php';
$latStep = ($max_lat - $min_lat) / $mapHeightPixels;
$lonStep = ($max_lon - $min_lon) / $mapWidthPixels;
$max_ground_elev = 0;
$lon = $min_lon;
for ($x = 0; $x < $mapWidthPixels; $x++) {
$lat = $min_lat;
for ($y = 0; $y < $mapHeightPixels; $y++) {
// echo "lat:$lat lon:$lon<BR>";
// $lon=$min_lon+ $x * ($max_lon-$min_lon) / $mapWidthPixels;
// $lat=$min_lat+ $y * ($max_lat-$min_lat) / $mapHeightPixels;
$alt = hgt::getHeight($lat, $lon);
//echo "$alt#";
if ($alt > $max_ground_elev) {
$max_ground_elev = $alt;
}
$mapEvelGnd[$x][$y] = $alt;
// $mapLatLon[$x][$y]="$lat,$lon";
$lat += $latStep;
}
$lon += $lonStep;
}
// print_r($mapEvelGnd);
// print_r($mapLatLon);
$img = imagecreatetruecolor($mapWidthPixels, $mapHeightPixels);
$backColor = imagecolorallocate($img, 214, 223, 209);
// $backColor =imagecolorallocate ($this->img,73,76,50);
if ($backColor == -1) {
echo "FAILED TO allocate new color<br>";
}
// imagefill($this->img,0,0, 1 );
imagefilledrectangle($img, 0, 0, $mapWidthPixels - 1, $mapHeightPixels - 1, $backColor);
// Allocate the color map
InterpolateRGB($colorScale, RGB(0, 0, 110), RGB(0, 0, 110), 0, 255);
InterpolateRGB($colorScale, RGB(0, 100, 0), RGB(180, 180, 50), 1, 60);
InterpolateRGB($colorScale, RGB(180, 180, 50), RGB(150, 110, 50), 60, 100);
InterpolateRGB($colorScale, RGB(150, 110, 50), RGB(150, 150, 150), 100, 150);
InterpolateRGB($colorScale, RGB(150, 150, 150), RGB(255, 255, 255), 150, 200);
InterpolateRGB($colorScale, RGB(255, 255, 255), RGB(255, 255, 255), 200, 253);
InterpolateRGB($colorScale, RGB(0, 0, 0), RGB(0, 0, 0), 254, 255);
AllocateColorMap($img, $colorScale, $cMap);
$factor = 256 / $max_ground_elev;
for ($x = 0; $x < $mapWidthPixels; $x++) {
for ($y = 0; $y < $mapHeightPixels; $y++) {
$color = $cMap[$mapEvelGnd[$x][$mapHeightPixels - $y] * $factor - 1];
imagesetpixel($img, $x, $y, $color);
}
}
$track_color = imagecolorallocate($img, 255, 0, 0);
for ($i = 0; $i < count($lat_arr); $i++) {
$lat = $lat_arr[$i];
$lon = $lon_arr[$i];
$x = ($lon - $min_lon) * $mapWidthPixels / ($max_lon - $min_lon);
$y = ($lat - $min_lat) * $mapHeightPixels / ($max_lat - $min_lat);
imagesetpixel($img, $x, $mapHeightPixels - $y, $track_color);
}
imagefilter($img, IMG_FILTER_SMOOTH, 200);
imagejpeg($img, $filename, 85);
imagedestroy($img);
return;
}
header('Content-Type: image/png');
echo $data;
} else {
set_time_limit(0);
$imgWidth = G_TILE_SIZE;
$imgHeight = G_TILE_SIZE;
$image = imagecreate($imgWidth, $imgHeight);
// Allocate the color map
InterpolateRGB($colorScale, RGB(0, 0, 110), RGB(0, 0, 110), 0, 255);
InterpolateRGB($colorScale, RGB(0, 100, 0), RGB(180, 180, 50), 1, 60);
InterpolateRGB($colorScale, RGB(180, 180, 50), RGB(150, 110, 50), 60, 100);
InterpolateRGB($colorScale, RGB(150, 110, 50), RGB(150, 150, 150), 100, 150);
InterpolateRGB($colorScale, RGB(150, 150, 150), RGB(255, 255, 255), 150, 200);
InterpolateRGB($colorScale, RGB(255, 255, 255), RGB(255, 255, 255), 200, 253);
InterpolateRGB($colorScale, RGB(0, 0, 0), RGB(0, 0, 0), 254, 255);
AllocateColorMap($image, $colorScale, $cMap);
MakeTile($image, $x, $y, $z);
$cache->set(PngToString($image), $id);
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);
}
} else {
header('Content-type: text/plain');
echo 'Invalid URL';
}
// Tile handling
function MakeTile($image, $x, $y, $zoom)
{
$proj = new Mercator($zoom, G_TILE_SIZE);
$lonL = $proj->Lon($x * G_TILE_SIZE);