private void PopulateGeoTiffDictionary(GeoTiffDictionary dictionary, FileMetadata mainTile, IGeoTiffService geoTiffService, IEnumerable <FileMetadata> fileMetadataList)
{
// Add main tile
if (!dictionary.ContainsKey(mainTile))
{
dictionary[mainTile] = geoTiffService.OpenFile(mainTile.Filename);
}
foreach (var fileMetadata in fileMetadataList)
{
if (!dictionary.ContainsKey(fileMetadata))
{
dictionary[fileMetadata] = geoTiffService.OpenFile(fileMetadata.Filename);
}
}
}
private float GetElevationAtPoint(FileMetadata mainTile, GeoTiffDictionary tiles, int x, int y, float nullValue)
{
int xRemap, yRemap;
FileMetadata goodTile = FindTile(mainTile, tiles, x, y, out xRemap, out yRemap);
if (goodTile == null)
{
return(nullValue);
}
if (tiles.ContainsKey(goodTile))
{
return(tiles[goodTile].ParseGeoDataAtPoint(goodTile, xRemap, yRemap));
}
else
{
throw new Exception("Tile not found. Should not happen.");
}
}