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.
Wiktionary(0.00 / 0 votes)Rate this definition: halcyon days(Noun) Period of calm during the winter, when storms do not occur. halcyon days(Noun) A period of calm, often nostalgic: u201Chalcyon days of yoreu201D, u201Chalcyon days of youthu201D.