MGD77 Data(Bathymetry,Geomagnetism,Gravity)

MGD77 data is displayed by every one file per one cruise(voyage).
Each file is separated by two records as below:
- Header Record:Voyage information, such as the observation method, observation machine, and data-processing method, etc. is recorded.
- Data Record:Observation data, such as depth of water,total magnetism, and gravity is recorded.

Data Source : Domestic organizations concerned and National Geophysical Data Center (NGDC).

Sea Region : All of the ocean which centered in nearby seas of Japan

Time Period : 1949 - 2002

Data Volume : 622 files

Bathymetry-----2,133,777 points

Geomagnetism---4,636,814 points

Gravity---------4,472,594 points

Data File Format

Database access

If you have any questions or comments, please do not hesitate to ask us at:
jodc@jodc.go.jp

Last update : Sep. 2006

Data Source	:	Domestic organizations concerned and National Geophysical Data Center (NGDC).
Sea Region	:	All of the ocean which centered in nearby seas of Japan
Time Period	:	1949 - 2002
Data Volume	:	622 files
		Bathymetry-----2,133,777 points
		Geomagnetism---4,636,814 points
		Gravity---------4,472,594 points