Commercial Vessel Density October 2009-2010 AIS UTM16
Data Set (DS) | Office for Coastal Management (OCM)GUID: gov.noaa.nmfs.inport:48868 | Updated: August 21, 2024 | Published / External
Item Identification
Title: | Commercial Vessel Density October 2009-2010 AIS UTM16 |
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Short Name: | CommercialVesselDensityOctober2009-2010UTM16 |
Status: | Completed |
Publication Date: | 2012-10 |
Abstract: |
These data were generated to provide insight into marine traffic patterns on a macro scale so they could be analyzed across the coastal waters of the Continental United States, this data set is for the UTM Zone 16N. 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. Some grid cells were unable to be processed, but this does not interfere with the integrity of this dataset. Please note multiple connection errors occurred during the time frame of this study. In most cases data gaps were filled by making subsequent request to the coastguard 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 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. Also as stated on the USCG NAIS website AIS data is 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. |
Purpose: |
To support coastal and ocean planning and other activities pursuant to the Energy Policy Act, Coastal Zone Management Act, Magnuson-Stevens Fishery Conservation and Management Act, National Environmental Policy Act, Rivers and Harbors Act and the Submerged Lands Act. |
Notes: |
11003 |
Other Citation Details: |
was received by Office for Coastal Management (OCM) by Office of Coast Survey (OCS) |
Supplemental Information: |
Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Transverse Mercator Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0001 Ordinate_Resolution: 0.0001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D North American 1983 Ellipsoid_Name: GRS 1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT
|
ISO 19115 Topic Category |
oceans
|
ISO 19115 Topic Category |
transportation
|
UNCONTROLLED | |
None | AIS |
None | ship counts |
None | vessel traffic |
Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
|
UNCONTROLLED | |
None | United States |
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Distribution Liability: |
These data are intended for coastal and ocean use planning. Not for navigation. |
Support Roles
Data Steward
Date Effective From: | 2012-10 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Distributor
Date Effective From: | 2012-10 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Metadata Contact
Date Effective From: | 2012-10 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Point of Contact
Date Effective From: | 2012-10 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Extents
Currentness Reference: | Ground Condition |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -90.218325 | |
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E° Bound: | -83.692684 | |
N° Bound: | 30.753747 | |
S° Bound: | 22.7091 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 2010 |
Spatial Information
Spatial Representation
Representations Used
Vector: | Yes |
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Access Information
Security Class: | Unclassified |
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Data Access Constraints: |
None |
Data Use Constraints: |
These data are intended for coastal and ocean use planning. Not for navigation. |
Distribution Information
Distribution 1
Download URL: | https://marinecadastre.gov/data/ |
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Distributor: | |
Description: |
Marine Cadastre Data Registry |
Distribution 2
Download URL: | https://marinecadastre.gov/downloads/data/ais/ais2009/CommercialVesselDensityOctober2009_2010UTM16.zip |
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Distributor: |
Activity Log
Activity Log 1
Activity Date/Time: | 2015-12-18 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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Description: |
Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. |
Activity Log 3
Activity Date/Time: | 2018-02-08 |
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Description: |
Partial upload of Positional Accuracy fields only. |
Data Quality
Accuracy: |
The attributes in this dataset are believed to be accurate. |
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Horizontal Positional Accuracy: |
Maximum scale of intended use is 1:80,000. |
Completeness Report: |
Spatial and attribute properties are believed to be complete, although attribute information has been simplified. Geometric thresholds from original data are preserved. No tests have been completed for exhaustiveness. |
Conceptual Consistency: |
These data are believed to be logically consistent. Geometry is topologically clean. |
Lineage
Sources
AIS Vessel Count - 2010
Contact Name: | Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS) |
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Publish Date: | 2012-07-01 |
Extent Type: | Range |
Extent Start Date/Time: | 2009-10 |
Extent End Date/Time: | 2010-10 |
Source Contribution: |
2010 Automatic Identification System (AIS) vessel count data for UTM Zone16N which provided information regarding vessel counts derived from AIS data at 1 kilometer square grids. | Type of Source Media: electronic mail system |
NATIONWIDE AUTOMATIC IDENTIFICATION SYSTEM
Contact Name: | U.S. Department of Homeland Security, United States Coast Guard, Navigation Center |
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Publish Date: | 2010-01-01 |
Extent Type: | Range |
Extent Start Date/Time: | 2009-10 |
Extent End Date/Time: | 2010-10 |
Citation URL: | http://www.navcen.uscg.gov/?pageName=NAISmain |
Source Contribution: |
NATIONWIDE AUTOMATIC IDENTIFICATION SYSTEM | Type of Source Media: online |
Process Steps
Process Step 1
Description: |
Source data derived from the raw AIS data processing is as follows: The USCG maintains a network of AIS receivers that collects AIS messages from passing ships. These data are transmitted to USCG data center that compiles the data and provides data feeds to other government agencies. In accordance with the USCG COMDTINST 5230.80, the USCG provided OCS with a "Level A" data feed. Level A is unfiltered real-time data that is less than 96 hours from initial time of transmission. OCS has subscribed to this data since 2008. To limit data storage requirements the data feed was filtered by the USCG to only send one position message per ship per minute and all duplicate messages (i.e. ship broadcasts received by more than one NAIS station) were removed. This real time feed was archived at OCS. A specialized software NOAADATA.py (K. Schwehr. The noaadata-py Software Tool-set, v0.42, 2009. http://vislab-ccom.-unh.edu/schwehr/software/noaadata) is used to create daily files and and load the data into an Oracle Spatial database. Despite receiving this filtered feed, a great deal of conditioning needs to take place to prepare this data to be analyzed. The AIS system was not intended or designed for subsequent analysis; however Calder and Schwehr ably proved, given the proper conditioning, AIS data can be used for traffic analysis. ( B. R. Calder., K. Schwehr. Traffic Analysis for the Calibration of Risk Assessment Methods. Proceedings: US Hydrographic Conference 2009, Norfolk, VA, 11-14 May 2009, http://www.thsoa.org/us09papers.htm) Based on their research, we filtered out AIS messages with non-unique user IDs and vessels with erroneous dimensions. We also separated messages by speed, separating those reporting a speed of less than 0.4 knots into a separate anchored table. The accuracy and abundance of the AIS data support high resolution analysis specifically within port areas. This study however was interested in traffic patterns on a macro scale so patterns could be analyzed across the coastal waters of the Continental United States. To limit the processing time and the overall file size for each region a grid cell size of 1 kilometer was chosen. For this dataset a transits is counted for every unique vessel intersecting a grid cell each day. Multiple trips into a grid cell on a given day by the same vessel are only counted as one transit. Instead of calculating transits based on the coordinates within the AIS message transit lines were created by connecting all the vessels reports each day. Traffic counts were then calculated by summing the number of lines within each cell. Although this dataset only contains the total traffic count "TRNSTS_TTL" the original dataset has transits by AIS vessel type and many other attributes as well. Processed from May - July 2012. |
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Process Date/Time: | 2012-07-01 00:00:00 |
Source: | NATIONWIDE AUTOMATIC IDENTIFICATION SYSTEM |
Process Step 2
Description: |
Further data development processing followed to obtain this feature class: Acquire original source data and maintain a copy on the development tier, create geodatabase import the original shapefiles. Delete all feature will zero values and validate the feature classes' geometry (Data Management > Features > Repair Geometry). Acquire, create and update metadata from providers (as needed). Compressed data set into a zip file for ease of download. |
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Process Date/Time: | 2012-10-16 00:00:00 |
Source: | AIS Vessel Count - 2010 |
Child Items
Rubric scores updated every 15m
Type | Title |
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Entity | Commercial Vessel Density October 2009-2010 AIS UTM16 |
Catalog Details
Catalog Item ID: | 48868 |
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GUID: | gov.noaa.nmfs.inport:48868 |
Metadata Record Created By: | Anne Ball |
Metadata Record Created: | 2017-11-14 15:55+0000 |
Metadata Record Last Modified By: | Jesse Brass |
Metadata Record Last Modified: | 2024-08-21 15:20+0000 |
Metadata Record Published: | 2019-01-24 |
Owner Org: | OCM |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2019-01-24 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2020-01-24 |