|EDT||Eastern Daylight Time. To derive EDT, subtract 4 hours from the UTC time.|
|Range of values|
|Range of values|
|SBNMS||Region: Stellwagen Bank National Marine Sanctuary|
GPS navigation log: Column A, vessel name, AUK, SBNMS research vessel; column B, field activity number; column C, date, UTC; column D, Julian Day, UTC; column E, study area time zone; column F, time, UTC (for Eastern Daylight Time subtract 4 hours); column G, latitude north, degrees and decimal minutes; column H longitude west, degrees and decimal minutes; column I, latitude north, decimal degrees; column J, longitude west, decimal degrees; column K, geographic region [abbreviations: D, degrees; H, hour; M, minute; S, second; EDT, Eastern Daylight Time; lat, latitude; lon, longitude; WHCMSC, USGS Woods Hole Coastal and Marine Science Center; SBNMS, Stellwagen Bank National Marine Sanctuary; UTC, coordinated universal (Greenwich Mean Time, ZULU time); GPS, satellite-based Global Positioning System receiver]
The 11 columns of data are the same as those represented in the entity and attribute detailed description.
The files with the same prefix name, but the CSV extension are exported from the Excel spreadsheet, minus the first two rows of information.
The *_raw.csv files are the original $GPGGA strings off the ship. The first row in the *raw.csv file describes the file. For the remaining rows, the format of the columns of information is as follows:
$GPGGA, UTC time, latitude (DDMM.MMMM), latitude hemisphere, longitude (DDMM.MMMM), longitude hemisphere.
These navigation data are provided in three different formats: CSV files which are an archive of the navigation data files acquired during the survey in the original collected format, as well as reformatted CSV and XLSX formats. The reformatted files add additional information, and most significantly provide the navigation in decimal degrees.
For the remaining rows, the format of the columns of information is as follows:
$GPGGA, UTC time, latitude (DDMM.MMMM), latitude hemisphere, longitude (DDMM.MMMM), longitude hemisphere. The UTC time is not formatted consistently. In AUK2015017_18may2015_UTC_nav_raw.csv the UTC time is HH:MM:SS, in AUK2015017_29may2015_UTC_nav_raw.csv and AUK2015017_03jun2015_UTC_nav_raw.csv the colon separator is not included.These files come directly from the ship, so the inconsistent formatting is du to their handling of the files. Person who carried out this activity:
latitude: (4211.9672-4200)/60+(42) to give 42.19945 decimal degrees
longitude: ((7043.2105-7000)/60 + 70) * -1 to give -70.72018 decimal degrees with negative for western hemisphere
Additional fields of information were added to the spreadsheet and are defined in the entity and attribute section, as well as within the header information in each spreadsheet. The first row is an explanation header, the second row contains descriptive column headers, and the third row contains brief column headers that are compatible with importing the data into a GIS.
Are there legal restrictions on access or use of the data?
Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
|Data format:||The ZIP file contains the navigation in XLSX and CSV formats, along with the FGDC CSDGM metadata. in format XLSX (version Excel 2016) Size: 3|
|Data format:||The ZIP file contains the navigation in XLSX and CSV formats, along with the FGDC CSDGM metadata. in format CSV Size: 3|
The ZIP file contains data in XLSX and CSV formats. The user must have software capable of uncompressing the ZIP file and reading the data formats.