private function readLatitudeAndLongitude($pointer) {
    if (false === $pointer) {
      // Deal with invalid IPs
      $latitude  = self::INVALID_IP_ADDRESS;
      $longitude = self::INVALID_IP_ADDRESS;
    } elseif (0 === self::$columns[self::LATITUDE][$this->type]) {
      // If the field is not suported, return accordingly
      $latitude  = self::FIELD_NOT_SUPPORTED;
      $longitude = self::FIELD_NOT_SUPPORTED;
    } else {
      // Read latitude and longitude
      $latitude  = $this->readFloat($pointer + self::$columns[self::LATITUDE][$this->type]);
      $longitude = $this->readFloat($pointer + self::$columns[self::LONGITUDE][$this->type]);
    }
    return [$latitude, $longitude];
  }