//*****************************************************************************
$query = "\n\tSELECT\n\t\theight,\n\t\tASTEXT(footprint) AS footprint\n\tFROM\n\t\tbuildings\n\tWHERE\n\t\tMBRINTERSECTS(GEOMFROMTEXT('%s'), footprint)\n ORDER BY\n height\n";
$args = array($boxPolygon);
$res = mysql_query(vsprintf($query, array_map("mysql_escape_string", $args)), $db);
if (mysql_error()) {
header("HTTP/1.0 404 Not Found");
exit;
}
if (!mysql_num_rows($res)) {
header("HTTP/1.0 204 No Content");
exit;
}
//*****************************************************************************
$json = array("meta" => array("n" => round($_GET["n"] * 100000) / 100000, "w" => round($_GET["w"] * 100000) / 100000, "s" => round($_GET["s"] * 100000) / 100000, "e" => round($_GET["e"] * 100000) / 100000, "x" => $XY["x"], "y" => $XY["y"], "z" => $Z), "data" => array());
//*****************************************************************************
header("Content-Type: application/json; charset=utf-8");
while ($row = mysql_fetch_object($res)) {
$h = ($row->height ? $row->height : 5) * SCALE_Z >> $z;
if ($h <= 1) {
continue;
}
$f = strToPoly($row->footprint);
$fp = array();
for ($i = 0; $i < count($f) - 1; $i += 2) {
$px = geoToPixel($f[$i], $f[$i + 1], $Z);
$fp[$i] = $px["x"] - $XY["x"];
$fp[$i + 1] = $px["y"] - $XY["y"];
}
$json["data"][] = array($h, $fp);
}
echo json_encode($json);
$source->query(createBBox($n, $w, $s, $e));
} catch (Exception $e) {
header('HTTP/1.0 404 Not Found');
exit;
}
if (!$source->count()) {
header('HTTP/1.0 204 No Content');
exit;
}
//*****************************************************************************
$json = array('meta' => array('n' => crop($_GET['n']), 'w' => crop($_GET['w']), 's' => crop($_GET['s']), 'e' => crop($_GET['e']), 'x' => $XY['x'], 'y' => $XY['y'], 'z' => $Z), 'data' => array());
//*****************************************************************************
header('Content-Type: application/json; charset=utf-8');
while ($row = $source->fetch()) {
$h = ($row->height ? $row->height : 5) * $heightScale >> $z;
if ($h <= 1) {
continue;
}
$f = strToPoly($row->footprint);
$fp = array();
for ($i = 0; $i < count($f) - 1; $i += 2) {
$px = preg_match('/^lat/i', $coordsOrder) ? geoToPixel($f[$i], $f[$i + 1], $Z) : geoToPixel($f[$i + 1], $f[$i], $Z);
$fp[$i] = $px['x'] - $XY['x'] + $offsetX;
$fp[$i + 1] = $px['y'] - $XY['y'] + $offsetY;
}
// Make polygon winding clockwise. This is needed for proper backface culling on client side.
// TODO: do this during data import
$fp = makeClockwiseWinding($fp);
$json['data'][] = array($h, $fp);
}
echo json_encode($json);