During the accessioning process, NODC created two files to include as additional metadata for this data collection. These files are a list of all latitude-longitude pairs for observations and a graphical plots of all data locations in a .jpg. The accession number assigned by NODC is depicted in each file name as #######. The files use the following naming conventions: #######_lonlat.txt - this file is created by extracting the longitude and latitude values for all station locations in the data. The list of longitude-latitude pairs is then processed to remove duplicate stations and to reformat the values to decimal degree formats, if necessary. The left column contains longitude values, the right column contains latitude values. In accordance with FGDC guidelines, North latitude and East longitude are positive values, South latitude and West longitude are negative values. #######_map.jpg - this JPEG file is created by plotting the values in #######_lonlat.txt using the unix plotting software Generic Mapping Tools (GMT). For more information about GMT, please see http://gmt.soest.hawaii.edu/ (last accessed on 2006-01-27).