Parent Layer: MSP_PublicUse

Name: Shipping Density 2011

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Type: Group Layer

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Description: These vessel density data were generated to provide insight into maritime vessel traffic patterns so they could be analyzed in the coastal waters of Washington. The density data are presented by vessel type in length in feet of vessel tracks per square mile. Each count per 660 feet (1/8 mile) squared block represents the number of vessels traveling within a square mile during the year of 2011. These data are created from 2011 AIS broadcast returns. Automatic Identification System (AIS) data is information collected by the U.S. Coast Guard to monitor real-time vessel information to improve navigation safety. Data such as ship name, purpose, course, and speed are acquired 24 hours per day in coastal U.S. waters. There were some grid cells which were unable to be processed, but this does not interfere with the integrity of this dataset. Overall data outages were minimal on the order less than a day per month and because random and affect all areas uniformly do not has a significant effect on the integrity of the data. The AIS data is not representative of all vessel traffic and USCG NAIS receivers do not fully cover the entire extent of this study area.

Service Item Id: 7b34b2db09644f8ba048af64f7153eb7

Copyright Text: TNC / Coast Guard

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Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

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