Commercial Vessel Density October 2009-2010 AIS National

These data were generated to provide insight into traffic patterns on a macro scale so they could be analyzed across the coastal waters of the Continental United States. For this dataset, a transit is counted for every unique vessel intersecting a 1 kilometer square grid cell each day. This data represents the total number of vessel transits from October 2009 - October 2010. There were some grid cells which were unable to be processed, but it is not perceived that this interferes with the integrity of these data. Please note multiple connection errors occurred during the time frame of this study. In most cases, data gaps were filled by making subsequent requests to the Coast Guard or other groups receiving the same data feed. However, due to resource constraints, uninterrupted coverage was not obtained. Overall data outages were minimal, on the order of less than a day per month. Because outages were random and affect all areas uniformly, they do not have a significant effect on the integrity of the data. As stated on the USCG NAIS website, AIS data are not representative of all vessel traffic and USCG NAIS receivers do not fully cover the entire extent of this study area. Please take time to understand both of these limitations.

Data and Resources

Additional Info

Field Value
Last Updated June 19, 2017, 22:19
Created June 19, 2017, 22:19
access_constraints ["Use Constraints: These data are intended for coastal and ocean use planning. Not for navigation.", "Access Constraints: None"]
bbox-east-long -65.565865
bbox-north-lat 49.228432
bbox-south-lat 22.655590
bbox-west-long -126.142653
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2012-09-01"}]
frequency-of-update notPlanned
licence ["These data are intended for coastal and ocean use planning. Not for navigation."]
metadata-date 2016-07-13
progress completed
resource-type dataset
responsible-party [{"name": "NOAA Office for Coastal Management", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-126.142653, 22.65559], [-65.565865, 22.65559], [-65.565865, 49.228432], [-126.142653, 49.228432], [-126.142653, 22.65559]]]}
spatial_harvester true