Method Init

generator/srtm_parser.cpp:58–104

}

void SrtmTile::Init(std::string const & dir, ms::LatLon const & coord)
{
  Invalidate();

  std::string const base = GetBase(coord);
  std::string const cont = GetSrtmContFileName(dir, base);
  std::string file = base + ".hgt";

  // Original files are stored in zip archives. Alternatively, they can be loaded
  // from uncompressed files like "N34E012.hgt".
  static bool const loadFromZip = static_cast<bool>(std::ifstream(cont));
  if (loadFromZip)
  {
    UnzipMemDelegate delegate(m_data);
    try
    {
      ZipFileReader::UnzipFile(cont, file, delegate);
    }
    catch (ZipFileReader::LocateZipException const &)
    {
      // Sometimes packed file has different name. See N39E051 measure.
      file = base + ".SRTMGL1.hgt";

      ZipFileReader::UnzipFile(cont, file, delegate);
    }

    if (!delegate.m_completed)
    {
      LOG(LWARNING, ("Can't decompress SRTM file:", cont));
      Invalidate();
      return;
    }
  }
  else
  {
    m_data = base::ReadFile(base::JoinPath(dir, file));
  }

  if (m_data.size() != kSrtmTileSize)
  {
    LOG(LWARNING, ("Bad decompressed SRTM file size:", cont, m_data.size()));
    Invalidate();
    return;
  }

  m_valid = true;
}

// static
ms::LatLon SrtmTile::GetCoordInSeconds(ms::LatLon const & coord)