|Title:||2016 AIS Vessel Transit Counts|
Automatic Identification Systems (AIS) are a navigation safety device that transmits and monitors the location and characteristics of many vessels in U.S. and international waters in real-time. In the U.S. the Coast Guard and industry collect AIS data, which can also be used for a variety of coastal planning purposes. NOAA and BOEM have worked jointly to re-task and make available some of the most important records from the U.S. Coast Guard's national network of AIS receivers. This dataset represents annual vessel transit counts summarized at a 100 m by 100 m geographic area. A single transit is counted each time a vessel track passes through, starts, or stops within a 100 m grid cell.
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.
|Other Citation Details:||
Design, development, and processing provided by: The Baldwin Group Inc. and RPS Group Inc.
Reference System: Web Mercator Auxiliary Sphere
Horizontal Datum: D_WGS_1984
Linear Unit: Meter (1.0)
Angular Unit: Degree (0.0174532925199433)
Geographic extent: 132W to 60W, 10.7S to 51.5N
|Global Change Master Directory (GCMD) Science Keywords||EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT|
|ISO 19115 Topic Categories||environment|
|ISO 19115 Topic Categories||oceans|
|ISO 19115 Topic Categories||planningCadastre|
|ISO 19115 Topic Categories||transportation|
|None||Automatic Identification System|
|None||coastal zone management|
|None||static data report|
|Global Change Master Directory (GCMD) Location Keywords||CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA|
|None||Exclusive Economic Zone|
|None||Outer Continental Shelf|
|None||United States of America|
|Organization:||Office for Coastal Management|
Data Set Information
|Data Set Scope Code:||Data Set|
|Maintenance Frequency:||None Planned|
|Data Presentation Form:||Map (digital)|
|Data Set Credit:||NOAA Office for Coastal Management, Bureau of Ocean Energy Management|
Point of Contact
|Date Effective From:||2018|
|Date Effective To:|
|Contact (Organization):||NOAA Office for Coastal Management (NOAA/OCM)|
2234 South Hobson Ave
Charleston, SC 29405-2413
|Currentness Reference:||Publication Date|
Extent Group 1
Spatial Representation: Grid
Dimension Count: 3
Cell Geometry: Point
Transformation Parameters Available: No
Axis1 Dimension Type: Row
Axis1 Size: varies
Axis2 Dimension Type: Column
Axis2 Size: varies
Axis3 Dimension Type: Vertical
Axis3 Size: 1
Extent Group 1 / Geographic Area 1
Extent Group 1 / Time Frame 1
|Time Frame Type:||Range|
|Data Access Constraints:||
|Data Use Constraints:||
For coastal and ocean planning.
MarineCadastre.gov Data Registry
|File Name:||Vessel Transit Counts 2016|
Content was acquired from original sources – no additional testing was done to cross reference or confirm otherwise the field or geometry values from other sources.
|Horizontal Positional Accuracy:||
Maximum scale of intended use is 1:80,000. Positional accuracy reflects the specifications and methods of the original data producer and has not been modified for the generation of this product.
All known records acquired from the Nationwide Automatic Identification System which includes approximately 58 U.S. ports and 11 coastal areas out to 24 nautical miles offshore. For further information on vessel reporting requirements and participation in the AIS, see carriage requirements in the Code of Federal Regulations, Title 33. Significant null values exist in some fields principally as a result of vessel operator practices.
Tested through visual inspection and through the analysis of summary statistics on field values.
AIS Vessel Tracks 2016
|Citation URL Name:||Source Online Linkage|
|Citation URL Description:||
URL where the source data were originally accessed.
Annual vessel tracks built using the Track Builder Pro 1.0 tool with time and distance parameters of 30 minutes and 1 nm. Vessel type definitions derived from the original NMEA record and the Authoritative Vessel Identification Service (AVIS) Vessel Catalog
Process Step 1
1. Select tracks for each vessel type from the 2016 AIS Vessel Tracks geodatabase by groups as defined in the AIS Vessel Type and Group Codes, Marine Cadastre 2018-05-23.
2. Calculate transit count grids using the MarineCadastre.gov AIS Vessel Transit Counter tool for each month of tracks and for each ocean basin.
3. Merge monthly transit count grids into an annual transit count grid.
|Process Date/Time:||2018-01-02 00:00:00|
|Source:||AIS Vessel Tracks 2016|
Process Step 2
1. Merge all 4 ocean basin/regional rasters into one raster using the mosaic to new raster tool.
|Process Date/Time:||2018-11-20 00:00:00|
|Process Contact:||NOAA Office for Coastal Management (NOAA/OCM)|
|Phone (Voice):||(843) 740-1202|
|Catalog Item ID:||54957|
|Metadata Record Created By:||Anna Verrill|
|Metadata Record Created:||2018-11-27 16:39+0000|
|Metadata Record Last Modified By:||Jesse Brass|
|Metadata Record Last Modified:||2022-01-13 17:04+0000|
|Metadata Record Published:||2019-01-24|
|Metadata Publication Status:||Published Externally|
|Do Not Publish?:||N|
|Metadata Next Review Date:||2020-01-25|