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Appendix 1

Home | Abbreviations | Data Collection | Data Processing | Data Access | Metadata | Appendix 1

InfoBank File Naming Conventions

InfoBank is a field data catalog for the U.S. Geological Survey (USGS) Coastal and Marine Geology Program (CMGP) with a structured information storage scheme of databases and software that provide access to USGS CMGP data and metadata, both of which can be accessed at http://walrus.wr.usgs.gov/infobank.

InfoBank uses a unique set of file-naming conventions. Dataset names are the combination of a prefix and a suffix. The prefixes are cruise identifiers and the suffix indicates the data type (Steele and others, 1989). The InfoBank cruise IDs are used to identify and name the MGD77T files presented in this report.

Cruise Identifier

The prefixes are cruise identifiers in one of the following forms: SLYYAA, SLLYYAA.

S = ship code

L (or LL) = leg number

YY = last two digits of the year it was obtained

AA = area code (see below section for descriptions)

Each cruise has a unique combination of ship code, leg number, year, and area code.

Ship Codes Used Within these Datasets

Geographical Area Codes for these Datasets

Data Type Numbering of Data Files from InfoBank

The suffix number indicates data type by its first digit:

.0xx = fix navigation; examples: Global Positioning System (GPS), Loran-C

.3xx = bathymetry

.6xx = range navigation; examples: radar, miniranger

The xx is the processing sequence number used internally by the USGS. The first x indicates equipment type and the second x is the processing version number. For more information about these sequence numbers a data dictionary is available on the USGS InfoBank website at http://walrus.wr.usgs.gov/infobank/programs/html/definition/datadictionary.html.

Home | Abbreviations | Data Collection | Data Processing | Data Access | Metadata | Appendix 1