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Computer technology applications at NOAA's National Oceanographic Data Center 

 have led to such innovations as the "live atlas/' a cathode-ray display of various 

 data graphics. Shown here: A display of the four quadrants of the world, a selected 

 quadrant with Marsden Square numbers added {upper right) , average annual 

 sea-surface temperatures by 1 -degree square for Marsden Square No. 81 , and vertical 

 profiles of maximum, minimum, and average water temperature for a selected 

 square and month. 



Beginning with a broad data base compiled during 10 years of marine 

 geophysical exploration by the Coast and Geodetic Survey (now NOAA's 

 National Ocean Survey) and from extensive Navy data formerly in the 

 NODC files, the NGDC marine group has rapidly increased its data in- 

 ventory and, with its IDOE marine geophysical data management respon- 

 sibilities, will now significantly expand its international data files. In addition, 

 the Naval Oceanographic Office has agreed to provide its unclassified marine 

 geophysical files to the NGDC; in March 1972, the Department of Defense 

 Gravity Library released over 160,000 gravity data points in the U.S. 

 coastal areas to the NGDC. 



One of the major programs of the U.S. IDOE effort is that of Seabed 

 Assessment. Approximately 90,000 nautical miles of IDOE trackline surveys 

 were completed in 1971 as part of this program by the USGS and NOAA. 

 Collected data are being forwarded to the NGDC for national and interna- 

 tional dissemination. 



62 



