public function to_json($load)
{
$field_data = parent::to_json($load);
$field_data = array_merge($field_data, array('lat' => is_float($this->lat) ? $this->lat : $this->default_lat, 'lng' => is_float($this->lng) ? $this->lng : $this->default_lng, 'zoom' => is_int($this->zoom) ? $this->zoom : $this->default_zoom, 'address' => $this->address));
return $field_data;
}