56121
COLREGS Demarcation Lines
Data Set
Published / External
37232
MarineCadastre
Project
Completed
2019-05-16
U.S. collision regulation boundaries delineate those waters upon which mariners shall comply with the International Regulations for Preventing Collisions at Sea, 1972 (72 COLREGS) and those waters upon which mariners shall comply with the Inland Navigation Rules. The waters inland of these lines are subject to the Inland Navigation Rules Act of 1980. The waters outside these lines are subject to the International Navigation Rules of the International Regulations for Preventing Collisions at Sea, 1972 (COLREGS). The Coast Guard has the legal authority to effect regulatory changes to COLREGS. Records in this database are derived from descriptions published in the Code of Federal Regulations Title 33, Part 80 and are for planning purposes only.
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 National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act.
Bureau Code: 006:48, Program Code: 006:055
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT
Theme
ISO 19115 Topic Category
boundaries
Theme
ISO 19115 Topic Category
oceans
Theme
ISO 19115 Topic Category
transportation
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Theme
coastal
Theme
planning
Theme
renewable energy
Spatial
Territorial Sea
Spatial
United States of America
Charleston
SC
Data Set
As Needed
Map (digital)
effectiveDate, state, boundaryIdentifier, instanceCode
https://www.marinecadastre.gov/about/disclaimer.html
U.S. Coast Guard, NOAA Office for Coastal Management, Bureau of Ocean Energy Management
56129
COLREGS Demarcation Lines
Published / External
GIS File
Yes
U.S. collision regulations boundaries; Source: NOAA Office for Coastal Management
1
state
n/a
No
No
Active
State within which the COLREGS boundary exists or is associated with; Source: NOAA Office for Coastal Management
Free text
2
effectiveDate
n/a
No
No
Active
Date the feature most currently represents; Source: NOAA Office for Coastal Management
Free text
3
boundaryName
n/a
No
No
Active
Name of the feature, as defined by the Code of Federal Regulations; Source: NOAA Office for Coastal Management
Free text
4
OBJECTID
n/a
No
No
Active
Internal feature number.; Source: Esri
Sequential unique whole numbers that are automatically generated.
5
instanceCode
n/a
No
No
Active
The enabling regulation reference statement under which the specific section is derived; Source: NOAA Office for Coastal Management
Free text
6
SHAPE_Length
n/a
No
No
Active
Length of feature in internal units.; Source: Esri
Positive real numbers that are automatically generated.
7
boundaryIdentifier
n/a
No
No
Active
Specific section within the CFR describing the feature; Source: NOAA Office for Coastal Management
Free text
8
SHAPE
n/a
No
No
Active
Feature geometry.; Source: Esri
Coordinates defining the features.
Point of Contact
2019-05
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
Publication Date
-178.110405
166.634428
71.182005
-14.295391
Discrete
2019-05-16
publication date
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/
MarineCadastre.gov Data Registry
https://marinecadastre.gov/downloads/data/mc/COLREGSDemarcationLine.zip
Microsoft Windows, ArcGIS Pro
Untested
Compiled to meet 10 meters horizontal accuracy at 95% confidence level
Untested
These data are logically consistent
33 CFR Part 80 COLREGS Demarcation Lines
Organization
U.S. Coast Guard
Originator
1981-05-26
Discrete
1981
https://www.ecfr.gov/current/title-33/chapter-I/subchapter-D/part-80
Geographic coordinates expressed in terms of latitude or longitude
COLREGS Demarcation Lines
Organization
NOAA Office of Coast Survey
Publisher
Discrete
2018-07-01
https://seamlessrnc.nauticalcharts.noaa.gov/arcgis/rest/services/RNC/NOAA_RNC/MapServer
Source Online Linkage
URL where the source data were originally accessed.
Raster display of NOAA nautical charts containing COLREGS Demarcation Lines
1
• Original source data and metadata acquired
• Heads up digitize, or coordinate input from original sources
• Cross reference between sources
• Dissolved unnecessary polyline splits and removed multiparts
• On MMS layers dissolved "BDRY_APRV_"
• On OC layers dissolved "APPRVDATE"
• Populated attribute contents
• Validated geometry
2010-01-01T00:00:00
2
• Create a new map document RNC service http://egisws02.nos.noaa.gov/ArcGIS/services/NOAA_RNC
• Add original feature class and scan for features in CollisionRegulationsBoundary feature class which were missing on RNC
• Search COLREGS in the CFR to confirm presence in original feature class
• Edit identified features, including descriptions and related fields in the attribute table
• Use CFR list of up-to-date locations of Collision Regulations to verify their locations in Atlantic, Gulf of Mexico, and Pacific Oceans
2012-01-01T00:00:00
3
• Create a new map document RNC service http://egisws02.nos.noaa.gov/ArcGIS/services/NOAA_RNC
• Add original feature class and scan for features in CollisionRegulationsBoundary feature class which were missing on RNC
• Create bookmarks in ArcMap of missing or erroneous features and features whose geometry does not match their RNC counterpart
• Check current CFR to confirm presence of features in original feature class and to see if new features need to be added
• Edit identified features, including descriptions and related fields in the attribute table
2014-07-01T00:00:00
4
• Compare original data from MarineCadastre.gov data registry to the 2014 Code of Federal Regulations (CFR) and Raster Navigational Charts (RNC)
• Use smallest scale RNC to evaluate features
• Add new features from CFR and RNC, and remove old features
• Update attribute fields
2015-04-01T00:00:00
5
• Download new version of CFR from https://www.govinfo.gov/content/pkg/CFR-2018-title33-vol1/pdf/CFR-2018-title33-vol1.pdf
• Adjust geometry of updated COLREGS lines later than 07/01/2014
• These include: 80.155, 80.160, 80.165, 80.501, 80.502, 80.712, 80.748, 80.815, 80.1420, 80.1430, 80.1440, 80.1450, 80.1460, 80.1470
• Use RNC map service as a guide to recreate new geometries
2019-02-01T00:00:00
56129
Entity
COLREGS Demarcation Lines
gov.noaa.nmfs.inport:56121
Anna Verrill
2019-04-25T11:47:25
SysAdmin InPortAdmin
2023-05-30T18:09:41
2019-04-25
Office for Coastal Management
OCM
1002
Public
No
2019-04-25
1 Year
2020-04-25