Short Citation:
Office for Coastal Management, 2020: COLREGs Demarcation Lines, https://www.fisheries.noaa.gov/inport/item/56121.

Item Identification

Title: COLREGs Demarcation Lines
Status: Completed
Publication Date: 2019-05-16
Abstract:

U.S. collision regulation boundaries are lines of demarcation delineating 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. Creation of features was interpreted from descriptions published in the Code of Federal Regulations Title 33, Part 80.

Purpose:

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.

Supplemental Information:

Bureau Code: 006:48, Program Code: 006:055

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords Earth Science > Human Dimensions > Environmental Governance/Management
ISO 19115 Topic Category boundaries
ISO 19115 Topic Category oceans
ISO 19115 Topic Category transportation
None coastal
None planning
None renewable energy

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States of America
None Territorial Sea
None United States of America

Physical Location

City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: Map (digital)
Entity Attribute Overview:

effectiveDate, state, boundaryIdentifier, instanceCode

Distribution Liability:

https://www.marinecadastre.gov/about/disclaimer.html

Data Set Credit: Bureau of Ocean Energy Management, NOAA Office for Coastal Management

Support Roles

Point of Contact

CC ID: 836661
Date Effective From: 2019-05
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: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 836665
W° Bound: -178.110405
E° Bound: 166.634428
N° Bound: 71.182005
S° Bound: -14.295391

Extent Group 1 / Time Frame 1

CC ID: 836664
Time Frame Type: Discrete
Start: 2019-05-16
Description:

publication date

Spatial Information

Spatial Representation

Vector Representation 1

CC ID: 901080
Complex Object Present?: No
Composite Object Present?: No
Curve Object Present?: Yes
Point Object Present?: No
Solid Object Present?: No
Surface Object Present?: No

Reference Systems

Reference System 1

CC ID: 901081

Coordinate Reference System

CRS Type: Geographic 2D
EPSG Code: EPSG:4269
EPSG Name: NAD83
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Use Constraints:

For coastal and ocean planning

Distribution Information

Distribution 1

CC ID: 836668
Download URL: ftp://ftp.coast.noaa.gov/pub/MSP/COLREGSDemarcationLines.zip
Distributor:
Description:

Data access URL

Distribution 2

CC ID: 836669
Download URL: https://marinecadastre.gov/data/
Distributor:
Description:

Data access URL

Technical Environment

Description:

Microsoft Windows, ArcGIS Pro

Data Quality

Accuracy:

Untested

Horizontal Positional Accuracy:

Compiled to meet 10 meters horizontal accuracy at 95% confidence level

Completeness Report:

Untested

Conceptual Consistency:

These data are logically consistent

Lineage

Sources

COLREGS Demarcation Lines

CC ID: 836650
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: NOAA Office of Coast Survey
Extent Type: Discrete
Extent Start Date/Time: 2018-07-01
Citation URL: https://seamlessrnc.nauticalcharts.noaa.gov/arcgis/rest/services/RNC/NOAA_RNC/MapServer
Citation URL Name: Source Online Linkage
Citation URL Description:

URL where the source data were originally accessed.

Source Contribution:

Data from CFR and RNC were used to compile this dataset.

Process Steps

Process Step 1

CC ID: 836654
Description:

• 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

Process Date/Time: 2010-01-01 00:00:00

Process Step 2

CC ID: 836651
Description:

• 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

Process Date/Time: 2012-01-01 00:00:00

Process Step 3

CC ID: 836653
Description:

• 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

Process Date/Time: 2014-07-01 00:00:00

Process Step 4

CC ID: 836655
Description:

• 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

Process Date/Time: 2015-04-01 00:00:00

Process Step 5

CC ID: 836652
Description:

• 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

Process Date/Time: 2019-02-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) COLREGS Demarcation Lines

Catalog Details

Catalog Item ID: 56121
Metadata Record Created By: Anna Verrill
Metadata Record Created: 2019-04-25 11:47+0000
Metadata Record Last Modified By: Daniel Martin
Metadata Record Last Modified: 2020-04-18 15:12+0000
Metadata Record Published: 2019-04-25
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2020-04-25