One exception to this is the Biological Data Profile of the FGDC. To go along with Bounding Coordinates specifying the extent of the data in the dataset, the profile specifies a mandatory Description of Geographic Extent element to provide a text description of the extent of the study and/or data set.
Calm, peaceful days. The Halcyon is a bird of Greek legend and the name is now commonly given to the European Kingfisher. The ancients believed that the bird made a floating nest in the Aegean Sea and had the power to calm the waves while brooding her eggs.
The Pillar of Autumn was a Halcyon class cruiser that was in service with the UNSC and it is where the first level of Halo takes place. While the Halcyon class of cruisers were described as old and lacking mobility and firepower they had one redeeming quality; they were extremely tough.