By Michael Lautenschlager, Manfred Reinke
Climate and Environmental Database Systems comprises the papers awarded on the moment overseas Workshop on weather and Environmental Database platforms, held November 21-23, 1995, in Hamburg, Germany.
weather and environmental information can be separated into periods, quite a lot of good based info and smaller quantities of much less established facts. the big quantities are produced through numerical weather types and by means of satellites, dealing with info within the order of value of a hundred Tbytes for the weather modelling websites and a thousand Tbytes for the recording and processing of satellite tv for pc info. Smaller quantities of poorly based information are the environmental info, which come typically from observations and measurements. Present-day difficulties in information administration are hooked up with numerous information kinds.
Climate and Environmental Database Systems addresses the state-of-the-art, functional event, and destiny views for weather and environmental database platforms, and should be used as a textual content for a graduate point path at the topic or as a reference for researchers or practitioners in industry.
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The objectives of the FGDC standard are to provide a common set of terminology and definitions for the documentation of digital geospacial data (FGDC 1994). Since April ll, 1995, an executive order is valid for each agency of the Federal Government in the United States forcing them to use this standard in data documentation. The DIF is focused on the description and storage of satellite-born datasets. It was designed to facilitate the interchange of metadata information between the members of the International Directory Network (ION), who are collecting this kind of data.
It is expected that the archive will be larger than l00TByte by the end of the year 1998. The CERA data model was developed at the DKRZ in co-operation with the Alfred-Wegener-Institute (AWl) in order to organize the information about and the handling of this huge amount of climate data. The development was guided by the intention to keep the system as simple as possible, but as complex as necessary to match the user requirements. The CERA system consists of three components (Fig. 1), the metadata (data about data), the blobdata (binary large objects), and the data processing.
It is the basic medium to synchronize the information content of all participants. This format is considered basically a 'de facto' standard for its original purpose, but is being extended to achieve compatibility to other standards which have arisen under various perspectives. The GCMD, being the American coordinating node of the ION, is managed through the Global Change Data Center (GCDC) at NASA's Goddard Space Flight Center (GSFC), Greenbelt, Maryland. The other nodes of the ION are operated by dedicated staff at the related various sites.