Example #1
0
function checkAirspace($filename)
{
    $lines = file($filename);
    if (!$lines) {
        echo "Cant read file";
        return;
    }
    $i = 0;
    // find bounding box of flight
    $min_lat = 1000;
    $max_lat = -1000;
    $min_lon = 1000;
    $max_lon = -1000;
    foreach ($lines as $line) {
        $line = trim($line);
        if (strlen($line) == 0) {
            continue;
        }
        if ($line[0] == 'B') {
            if (strlen($line) < 23) {
                continue;
            }
            $thisPoint = new gpsPoint($line, 0);
            if ($thisPoint->lat > $max_lat) {
                $max_lat = $thisPoint->lat;
            }
            if ($thisPoint->lat < $min_lat) {
                $min_lat = $thisPoint->lat;
            }
            if (-$thisPoint->lon > $max_lon) {
                $max_lon = -$thisPoint->lon;
            }
            if (-$thisPoint->lon < $min_lon) {
                $min_lon = -$thisPoint->lon;
            }
        }
    }
    // echo "$min_lat,	$max_lat,$min_lon,	$max_lon<BR>";
    // now find the bounding boxes that have common points
    // !( A1<X0 || A0>X1 ) &&  !( B1<Y0 || B0>Y1 )
    // X,A -> lon
    // Y,B -> lat
    // X0 -> $min_lon A0-> $area->minx
    // X1 -> $max_lon A1-> $area->maxx
    // Y0 -> $min_lat B0-> $area->miny
    // Y1 -> $max_lat B1-> $area->maxy
    // !( $area->maxx<$min_lon || $area->minx>$max_lon ) &&  !( $area->maxx<$min_lat || $area->miny>$max_lat )
    global $AirspaceArea, $NumberOfAirspaceAreas;
    getAirspaceFromDB($min_lon, $max_lon, $min_lat, $max_lat);
    $NumberOfAirspaceAreas = count($AirspaceArea);
    /*
    	foreach($AirspaceArea as $i=>$area) {
    		if ( !( $area->maxx<$min_lon || $area->minx>$max_lon ) &&
    			 !( $area->maxy<$min_lat || $area->miny>$max_lat )
    		) {
    			if ($area->Shape==1) $shape="Area  "; else $shape="Circle";
    			DEBUG("checkAirspace",1, "Found $shape [$i] => ".$area->Name.'<BR>');
    			// print_r($area);
    			if ($area->Shape==1) {
    				$area->Points[]=$area->Points[0];
    				// $area->NumPoints=count($area->Points);
    			}
    			$selAirspaceArea[]=$area;
    		}
    	}
    
    	$AirspaceArea=$selAirspaceArea;
    	$NumberOfAirspaceAreas=count($AirspaceArea);
    */
    //	echo '<HR>';
    // print_r($AirspaceArea);
    //	echo '<HR>';
    //	echo '<HR>';
    $violations = array();
    $i = 0;
    foreach ($lines as $line) {
        $line = trim($line);
        if (strlen($line) == 0) {
            continue;
        }
        if ($line[0] == 'B') {
            if (strlen($line) < 23) {
                continue;
            }
            $thisPoint = new gpsPoint($line, 0);
            $alt = $thisPoint->getAlt(1);
            // prefer vario alt
            // $insideArea=-1;
            $insideAreas = array();
            $insideAreas = FindAirspaceArea(-$thisPoint->lon, $thisPoint->lat, $alt);
            if (count($insideAreas) > 0) {
                //echo "point [$i] INSIDE AIRSPACE areas: ";
                //foreach($insideAreas as $areaInfo) echo $AirspaceArea[$areaInfo[0]]->Name." areaID[$areaInfo[0]] disInside[$areaInfo[1]] altInside[$areaInfo[2]]  ";
                foreach ($insideAreas as $areaInfo) {
                    $areaID = $areaInfo[0];
                    $disInside = $areaInfo[1];
                    $altInside = $areaInfo[2];
                    if ($disInside > $violations[$areaID]['maxDistance']) {
                        $violations[$areaID]['maxDistance'] = $disInside;
                    }
                    if ($altInside > $violations[$areaID]['maxAlt']) {
                        $violations[$areaID]['maxAlt'] = $altInside;
                    }
                }
                //echo "<BR>";
            } else {
                // echo "OK<BR>";
            }
            $i++;
        }
    }
    $resStr = '';
    $resStr1 = '';
    if (count($violations) > 0) {
        foreach ($violations as $i => $violatedArea) {
            $resStr1 .= $AirspaceArea[$i]->id . ",";
            $resStr .= "HorDist: " . floor($violatedArea['maxDistance']) . "m, VertDist:" . floor($violatedArea['maxAlt']) . "m, ";
            $resStr .= 'Airspace: ' . $AirspaceArea[$i]->Name . ' [' . $AirspaceArea[$i]->Type . '] ' . floor($AirspaceArea[$i]->Base->Altitude) . '-' . floor($AirspaceArea[$i]->Top->Altitude) . "m\n";
            // COMMENT: '.$AirspaceArea[$i]->Comment."\n";
        }
        if ($resStr1) {
            $resStr1 = substr($resStr1, 0, -1) . "\n";
            $resStr = trim($resStr);
        }
    }
    //$m1=memory_get_usage();
    //echo "ReadAltitude: mem usage: $m1 <BR>";
    return $resStr1 . $resStr;
}
Example #2
0
 $max_lon = $_REQUEST['max_lon'];
 $min_lat = $_REQUEST['min_lat'];
 $max_lat = $_REQUEST['max_lat'];
 //Mod. P. Wild 5.10.2009 - show a few more airspaces around track (increase proximity level)
 // show a bit more airspaces around the flight
 // Manolis 09.12.2009
 // put in the config variable $CONF['airspace']['zoom']
 if ($CONF['airspace']['zoom'] && $CONF['airspace']['zoom'] != 100) {
     // $zoom=102; //Percentage
     $zoom = $CONF['airspace']['zoom'];
     $min_lon = $min_lon + $min_lon * (100 - $zoom) / 100;
     $max_lon = $max_lon + $max_lon * ($zoom - 100) / 100;
     $min_lat = $min_lat + $min_lat * (100 - $zoom) / 100;
     $max_lat = $max_lat + $max_lat * ($zoom - 100) / 100;
 }
 getAirspaceFromDB($min_lon, $max_lon, $min_lat, $max_lat);
 $NumberOfAirspaceAreas = count($AirspaceArea);
 // echo " // found( $NumberOfAirspaceAreas) areas  $min_lon , $max_lon , $min_lat ,$max_lat <BR>";
 $res = '{ "airspaces": [ ';
 $i = 0;
 foreach ($AirspaceArea as $i => $area) {
     if ($i > 0) {
         $res .= " ,\n";
     }
     $points = "";
     if ($area->Shape == 1) {
         // area
         for ($j = 0; $j < $area->NumPoints; $j++) {
             if ($j > 0) {
                 $points .= " ,";
             }