/// <summary>
/// Test method to load a series of HGT files in a directory
/// </summary>
/// <param name="directory"></param>
public static List<IElevationDataSet> LoadHGTFilesInDirectory(String directoryPath)
{
IHgtFileNameParser fileNameParser = new HgtFileNameParser();
IHgtByteConverter byteConverter = new HgtByteConverter();
IElevationFileReader elevationDataReader = new LocalFileStorageHgtElevationFileReader(fileNameParser, byteConverter);
List<String> fileNames = new List<string>();
List<IElevationDataSet> elevationDataSets = new List<IElevationDataSet>();
if (!Directory.Exists(directoryPath))
throw new DirectoryNotFoundException(directoryPath);
fileNames.AddRange(Directory.GetFiles(directoryPath, "*.hgt", SearchOption.AllDirectories));
foreach (String fileName in fileNames)
{
DecimalGeoCoordinate geoCoordinate = fileNameParser.ParseGeoCoordinateFromFileName(fileName);
IElevationDataSet dataSet = elevationDataReader.LoadDataSet(fileName);
elevationDataSets.Add(dataSet);
}
return elevationDataSets;
}
static void Main(string[] args)
{
String demDataFolder = @"D:\\Code\\Projects\\DEMData\\";
IHgtFileNameParser fileNameParser = new HgtFileNameParser();
IHgtByteConverter byteConverter = new HgtByteConverter();
IAzureFileStorageShareProvider azureStorageProvider = new AzureFileStorageShareProvider(
System.Configuration.ConfigurationManager.AppSettings["StorageConnectionString"],
"hgt");
IElevationFileReader elevationFileReader = new LocalFileStorageHgtElevationFileReader(fileNameParser, byteConverter);
IElevationFileReader azureFileReader = new AzureFileStorageHgtElevationFileReader(fileNameParser, byteConverter, azureStorageProvider);
CloudFileDirectory cloudDirectoryRoot = azureStorageProvider.GetCloudFileShare().GetRootDirectoryReference();
IElevationDataSet azureTestSet = azureFileReader.LoadDataSet(
Path.Combine(cloudDirectoryRoot.Uri.ToString(), "N48E000.hgt"));
IElevationDataSetRepository dataSetRepository = new ElevationDataSetFileSystemRepository(
azureFileReader,
fileNameParser,
demDataFolder);
IElevationDataManager elevationDataManager = new ElevationDataManager(dataSetRepository);
DecimalGeoCoordinate testCoordinate = new DecimalGeoCoordinate(54.5, -2.5);
int elevation;
if (elevationDataManager.IsElevationDataSetAvailable(testCoordinate))
elevation = elevationDataManager.GetElevationAtCoordinate(testCoordinate);
IElevationProfiler elevationProfiler = new ElevationProfiler(
elevationDataManager,
new SimplePathPlotter()); // Used to draw the line by the elevation profiler
IElevationProfile elevationProfile = elevationProfiler.GetElevationProfile(
new DecimalGeoCoordinate(55.1, -2.1), // Start of line
new DecimalGeoCoordinate(55.2, -2.2), // End of line
100); // Number of segments or 'resolution' of the profile
IElevationProfile elevationProfile2 = elevationProfiler.GetElevationProfile(
new List<DecimalGeoCoordinate>() { new DecimalGeoCoordinate(52, -1), new DecimalGeoCoordinate(52.2, -1.2), new DecimalGeoCoordinate(52.2, -1.4) }, 10);
foreach (ElevationDataPoint point in elevationProfile.Points)
Console.WriteLine("{0} {1}", point.Coordinates, point.ElevationInMetres);
Console.ReadKey();
}
/// <summary>
/// Convert an elevation data file (.hgt) to an azure table store
/// </summary>
/// <param name="message"> Specifies the filename of the .hgt file on azure file storage </param>
/// <param name="log"></param>
public static void ProcessHgtElevationFile([QueueTrigger("table-conversion-queue")] string message, TextWriter log)
{
IHgtFileNameParser fileNameParser = new HgtFileNameParser();
if (!fileNameParser.IsValidHGTFileNameFormat(message.Replace(".hgt", String.Empty)))
throw new ArgumentException(String.Format("'{0}' is not a valid hgt filename.", message));
IElevationFileReader azureFileReader = GetAzureStorageElevationFileReader();
CloudTable cloudTable = GetAzureCloudTable();
IElevationDataSet dataSet = azureFileReader.LoadDataSet(message);
Stopwatch sw = new Stopwatch();
Console.WriteLine(String.Format("Processing file: {0}", message));
sw.Start();
ConvertToTableStorage(cloudTable, dataSet);
sw.Stop();
Console.WriteLine("Finished processing file '{0}'. Time Taken: {1}", message, sw.Elapsed);
}
/// <summary>
/// Create an elevation reader for the azure file storage
/// </summary>
/// <returns></returns>
private static IElevationFileReader GetAzureStorageElevationFileReader()
{
IHgtFileNameParser fileNameParser = new HgtFileNameParser();
IHgtByteConverter byteConverter = new HgtByteConverter();
IAzureFileStorageShareProvider azureStorageProvider = new AzureFileStorageShareProvider(
ConfigurationManager.ConnectionStrings["AzureWebJobsStorage"].ConnectionString,
"hgt");
return new AzureFileStorageHgtElevationFileReader(fileNameParser, byteConverter, azureStorageProvider);
}