64830 Data Set Published / External 55360 Automatic Identification System (AIS) Project Completed 2021-09-28 A vessel track shows the location and characteristics of commercial and recreational boats as a sequence of positions transmitted by an Automatic Identification System (AIS). AIS signals are susceptible to interference and this can result in a gap within a vessel track. The distribution, type, and frequency of vessel tracks are a useful aid to understanding the risk of conflicting uses within a certain geographic area. The vessel track positions in this data set are collected and recorded from land-based antennas as part of a national network operated by the U.S. Coast Guard. To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act. Bureau Code: 006:48, Program Code: 006:055 Theme ISO 19115 Topic Category oceans Theme ISO 19115 Topic Category transportation Theme coastal Theme planning Theme renewable energy Spatial Exclusive Economic Zone Spatial Outer Continental Shelf Spatial Territorial Sea Spatial United States of America Data Set Geodatabase None Planned Map (digital) OBJECTID, MMSI, TrackStartTime, TrackEndTime, VesselType, Length, Width, Draft, DurationMinutes, VesselGroup https://www.marinecadastre.gov/about/disclaimer.html U.S. Coast Guard Navigation Center, Bureau of Ocean Energy Management, NOAA Office for Coastal Management Point of Contact 2021-09-28 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource -168 -60 50 15 Range 2020-01-01 2020-12-31 No Yes No No No Geometry Only No No Yes No No No Geographic 2D EPSG:4269 NAD83 North American Datum 1983 GRS 1980 6378137 298.257222101 1 Geodetic Latitude Lat degree north 1 Geodetic Latitude Lat degree north 2 Geodetic Longitude Lon degree east 2 Geodetic Longitude Lon degree east Unclassified For coastal and ocean planning https://marinecadastre.gov/data Marine Cadastre Data Registry https://ocmgeodatastor1.blob.core.windows.net/marinecadastre/ais/aistrack/index-aistrack.html Microsoft Windows, ArcGIS Pro Compiled to meet 10 meters horizontal accuracy at 95% confidence level a) The geographic extent of these data include the conterminous United States, Hawaii, U.S. Virgin Islands and Puerto Rico. b) Presence, absence, and contiguity of a track is dependent on the distance and temporal filters applied in the track building algorithm. Parameters for these data were 1 nautical mile and 30 minutes. These data are logically consistent U.S. Coast Guard Navigation Center 2021-01-01 Daily compressed log files containing original AIS messages in NMEA format for the months of January through December for the United States 1 1. Filter the raw NMEA data to a one-minute sample rate and select a subset of fields using MarineCadastre.gov NMEA to SQL Server processing tools 2. Load filtered records to an SQL Server 2020 database using MarineCadastre.gov NMEA to SQL Server processing tools 3. Conduct quality and completeness check using logging results from the filter and loading process 4. Update the IMO, CallSign, VesselName, Length, Width, VesselType, and Draft from United States Coast Guard AVIS where original AIS values are missing 5. Add a new vessel type code to each record fragment that originated from the United States Coast Guard AVIS 6. Develop track line features directly from the SQL Server database using a customize version of the MarineCadastre.gov Track Builder 3.1 (64-bit version) for each month of broadcast records and for each ocean basin, using a filter setting of 30 minutes and 1 mile 7. Added field for vessel type group and populated based on the vessel type code to vessel group mapping described in attribute metadata 8. Added field for track line duration, and calculated the time in minutes between the start and end time for each track feature 9. Performed visual quality and consistency checks, and removed vessel tracks that were clearly invalid (on land) or beyond the ocean basin 10. REPAIR GEOMETRY to remove features with null geometry 2021-04-01T00:00:00 gov.noaa.nmfs.inport:64830 Jesse Brass 2021-07-01T19:21:43 Jesse Brass 2026-04-14T15:37:32 2021-09-28 Office for Coastal Management OCM 1002 Public No No 2021-09-28 1 Year 2022-09-28