private IObservable <Unit> Download(GeoCoordinate coordinate)
{
_trace.Info(TraceCategory, "downloading data for {0}", coordinate.ToString());
return(_downloader.Download(coordinate).SelectMany(bytes =>
{
_trace.Info(TraceCategory, "downloaded {0} bytes", bytes.Length.ToString());
_hgtData = CompressionUtils.Unzip(bytes).Single().Value;
InitData((int)coordinate.Latitude, (int)coordinate.Longitude);
// store data to disk
var path = GetFilePath(_srtmLat, _srtmLon);
_trace.Info(TraceCategory, "storing as {0}", path);
using (var stream = _fileSystemService.WriteStream(path))
stream.Write(_hgtData, 0, _hgtData.Length);
return Observable.Return <Unit>(Unit.Default);
}));
}
