AIS data

Automatic identification system (AIS) data are used to identify and track vessels for various purposes (primarily navigational safety). These data can be used to study vessel traffic, such as ship routing and speed over ground (SOG). Source data were obtained from the United States Coast Guard Navigation Center (USCG NAVCEN) for the period from June 2008 to December 2015. Derived data resulting from the processing of the source data are described here. This data set presents annual raster data (1 square kilometer grid size) off California from 2008-2015 for cumulative ship traffic density (kilometers/day) and mean SOG (knots; distance-weighted). The universe of data is limited to vessels with a length greater than or equal to 80 meters. The data are analyzed in three groups: freight vessels (container, general cargo, bulk carrier, refrigerated cargo, vehicle carrier, etc.), tanker vessels (crude oil, chemical/products, liquid petroleum gas, etc.) and all vessels (the previously noted vessels, plus passenger vessels and other vessel classes). The data are contained in a file geodatabase format as raster data sets. Metadata for the overall data set are contained at the level of the file geodatabase. The data were generated and used for a research article (Moore et al. 2018): Moore, T.J., Redfern, J.V., Carver, M., Hastings, S., Adams, J.D., Silber, G.K., 2018. Exploring Ship Traffic Variability off California. Ocean and Coastal Management. See this manuscript for more information on the data description, issues, and processing methods.

Data and Resources

Additional Info

Field Value
Last Updated August 6, 2019, 06:01
Created October 23, 2018, 05:19
access_constraints ["Access Constraints: No constraints for access to data that are published in the Mendeley Data repository. | Use Constraints: If these data are used, please make reference to the following citations:\n\nMoore, T.J., Redfern, J.V., Carver, M., Hastings, S., Adams, J.D., Silber, G.K., 2018. Exploring ship traffic variability off California. Ocean & Coastal Management 163, 515-527. DOI: 10.1016/j.ocecoaman.2018.03.010\n\nMoore, T.J., 2018. Vessel density and vessel speed data off California: 2008-2015, Mendeley Data, v1. DOI: 10.17632/4tgwv45bz8.1"]
bbox-east-long -116.6
bbox-north-lat 42
bbox-south-lat 30.5
bbox-west-long -128.9
coupled-resource []
dataset-reference-date [{"type": "creation", "value": "2017"}, {"type": "publication", "value": "2018-03"}]
frequency-of-update notPlanned
guid gov.noaa.nmfs.inport:54048
licence ["NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose."]
metadata-date 2019-06-26T11:51:22
metadata-language eng
progress onGoing
resource-type dataset
responsible-party [{"name": "", "roles": ["pointOfContact", "custodian"]}]
spatial {"type": "Polygon", "coordinates": [[[-128.9, 30.5], [-116.6, 30.5], [-116.6, 42.0], [-128.9, 42.0], [-128.9, 30.5]]]}
spatial_harvester true
temporal-extent-begin 2008
temporal-extent-end 2015