public static ElevationTileCollection GetUniqueTilesForRemoval(long dedId, IEnumerable <DownloadedElevationData> allData, ElevationTileCollection tilesToBeRemoved)
{
//Get only tiles, that are not used by another areas
var tilesForRemoval = new List <ElevationTile>();
foreach (var tile in tilesToBeRemoved.AsEnumerable())
{
var doNotRemove = false;
foreach (var anotherDedItem in allData)
{
if (anotherDedItem.Id == dedId)
{//skip deleted item (but it is actually already removed)
continue;
}
var anotherDedTiles = new ElevationTileCollection(new GpsLocation(anotherDedItem.Longitude, anotherDedItem.Latitude, 0), anotherDedItem.Distance);
if (anotherDedTiles.HasElevation(tile.StartLocation, false))
{
doNotRemove = true;
break;
}
}
if (!doNotRemove)
{
tilesForRemoval.Add(tile);
}
}
return(new ElevationTileCollection(tilesForRemoval));
}
public static ElevationTileCollection GetTilesForRemoval(GpsLocation location, int oldDistance, int newDistance)
{
var dedTiles = new ElevationTileCollection(location, newDistance);
var dedTilesOld = new ElevationTileCollection(location, oldDistance);
var tilesForRemoval = new List <ElevationTile>();
foreach (var tile in dedTilesOld.AsEnumerable())
{
if (!dedTiles.HasElevation(tile.StartLocation, false))
{
tilesForRemoval.Add(tile);
}
}
return(new ElevationTileCollection(tilesForRemoval));
}
