/**
* Finds the closest image available for a given time and datasource
*
* @return JSON meta information for matching image
*
* TODO: Combine with getJP2Image? (e.g. "&display=true")
*/
public function getClosestImage()
{
include_once HV_ROOT_DIR . '/../src/Database/ImgIndex.php';
$imgIndex = new Database_ImgIndex();
$image = $imgIndex->getDataFromDatabase($this->_params['date'], $this->_params['sourceId']);
// Read JPEG 2000 header
$file = HV_JP2_DIR . $image['filepath'] . '/' . $image['filename'];
$xmlBox = $imgIndex->extractJP2MetaInfo($file);
// Prepare cache for tiles
$this->_createTileCacheDir($image['filepath']);
// Return date and id
$response = array_merge(array('id' => $image['id'], 'date' => $image['date']), $xmlBox);
// Print result
$this->_printJSON(json_encode($response));
}