private bool IsDatabaseComplete()
{
// checks if elevation database is complete
try
{
// get all locs needed for covered area
// try to read cached catalogue first
ElevationCatalogue cat = ElevationData.Database.ElevationCatalogueCreateCheckBoundsAndLastModified(null, StartOptions.Model, StartOptions.MinLat, StartOptions.MinLon, StartOptions.MaxLat, StartOptions.MaxLon);
// process tiles
foreach (KeyValuePair <string, DateTime> availabletile in cat.Files)
{
// check if tile is in database and return false if tile is not found
if (!ElevationData.Database.ElevationTileExists(availabletile.Key.Substring(0, 6).ToUpper(), StartOptions.Model))
{
return(false);
}
if (this.CancellationPending)
{
break;
}
}
}
catch (Exception ex)
{
this.ReportProgress(-1, ex.ToString());
return(false);
}
return(true);
}
public static ElevationCatalogue FromJSONFileCheckBoundsAndLastModified(string filename, double minlat, double minlon, double maxlat, double maxlon)
{
// read cache from json file
ElevationCatalogue cat = FromJSONFile(filename);
// return null on error
if (cat == null)
{
return(null);
}
// check last write time from json file --> must be equal to LastModification timestamp of catalogue
if (File.GetLastWriteTimeUtc(filename) != cat.LastModified)
{
return(null);
}
// check if bounds are equal
if ((cat.MinLat != minlat) || (cat.MinLon != minlon) || (cat.MaxLat != maxlat) || (cat.MaxLon != maxlon))
{
return(null);
}
// success --> return cached catalogue
return(cat);
}
private int UpdateDatabase()
{
// updates elevation database
int errors = 0;
int bulkmax = 400;
try
{
// get all locs needed for covered area
// try to read cached catalogue first
ElevationCatalogue cat = ElevationData.Database.ElevationCatalogueCreateCheckBoundsAndLastModified(null, StartOptions.Model, StartOptions.MinLat, StartOptions.MinLon, StartOptions.MaxLat, StartOptions.MaxLon);
// process tiles
List <ElevationTileDesignator> tiles = new List <ElevationTileDesignator>();
foreach (KeyValuePair <string, DateTime> availabletile in cat.Files)
{
// collect tiles for bulk insert
ElevationTileDesignator t;
bool b = UpdateElevationTileFromURL(availabletile.Key, availabletile.Value, StartOptions.Model, out t);
if (b)
{
if (t != null)
{
tiles.Add(t);
}
}
else
{
errors++;
}
if (tiles.Count >= bulkmax)
{
errors -= ElevationData.Database.ElevationTileBulkInsert(tiles, StartOptions.Model);
tiles.Clear();
}
if (this.CancellationPending)
{
break;
}
// sleep or not whether database is complete
if ((ElevationData.Database.GetDBStatus(StartOptions.Model) & DATABASESTATUS.COMPLETE) > 0)
{
Thread.Sleep(Properties.Settings.Default.Database_BackgroundUpdate_ThreadWait);
}
else
{
Thread.Sleep(10);
}
}
// update rest of tiles
if (tiles.Count > 0)
{
errors -= ElevationData.Database.ElevationTileBulkInsert(tiles, StartOptions.Model);
}
// cleanup all *.loc files
foreach (string f in Directory.EnumerateFiles(ElevationData.Database.DefaultDatabaseDirectory(StartOptions.Model), "*.loc"))
{
try
{
File.Delete(f);
}
catch (Exception ex)
{
this.ReportProgress(-1, ex.ToString() + ": " + f);
errors++;
}
}
}
catch (Exception ex)
{
this.ReportProgress(-1, ex.ToString());
// report at least one error
if (errors == 0)
{
errors = 1;
}
return(-errors);
}
return(-errors);
}