architectural longitudinal section drawing dark background near black 1a1714 subterranean tunnel sequence beneath federal hill baltimore earth mass rendered in dark warm gray poche tunnel interior floor plane in warm off white five chamber sequence visible long compression corridor on left transitioning to arched vault bays staggered baffles in middle zone organic carved sand vaults on right terminus federal hill topographic profile sitting above as solid dark mass thin warm off white dimension lines and chamber labels in small serif type single horizontal ground line avam building silhouette as simple outline on far left atmosphere of controlled darkness and geological weight no color except single accent of muted teal 2d6b5e at rightmost akerson vault presentation quality architectural drawing cinematic aspect ratio 16 9
