National Pipeline Mapping System

This page last updated: 02/14/2014
Metadata created using Minnesota Geographic Metadata Guidelines

Go to Section:
1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

Section 1 Overview
Originator U.S. Department of Transportation
Title National Pipeline Mapping System
Abstract The National Pipeline Mapping System (NPMS) is a geographic information system (GIS) created by the U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration (PHMSA), Office of Pipeline Safety (OPS) in cooperation with other federal and state governmental agencies and the pipeline industry. The NPMS consists of geospatial data, attribute data, public contact information, and metadata pertaining to the interstate and intrastate hazardous liquid trunklines and hazardous liquid low-stress lines as well as gas transmission pipelines, liquefied natural gas (LNG) plants, and hazardous liquid breakout tanks jurisdictional to PHMSA.
Purpose The Pipeline and Hazardous Materials Safety Administration uses the NPMS as a tool to support various regulatory programs, pipeline inspections, and authorized external customers.
Time Period of Content Date
Currentness Reference See the NPMS website for the most recent version of pipeline data.
Progress In work
Maintenance and Update Frequency As needed
Spatial Extent of Data United States
Bounding Coordinates -179.00
Place Keywords U.S., USA, United States, Minnesota, MN
Theme Keywords utilitiesCommunication, LNG Facility, Pipeline, Oil, Gas, Natural Gas
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints The Pipeline and Hazardous Materials Safety Administration restricts access to the NPMS to federal, state, and local government agencies (including emergency responders). Pipeline operators are allowed access to their own pipeline data only.
Use Constraints Neither the United States Government nor any party involved in the creation and compilation of NPMS data and maps guarantees the accuracy or completeness of the products. NPMS data should be considered no more accurate than plus or minus 500 feet and must never be used as a substitute for contacting the appropriate local one-call center prior to digging.
Contact Person Information Amy Nelson, GIS Manager
U.S. Dept. of Transportation - Pipeline and Hazardous Materials Safety Administration (PHMSA)
1200 New Jersey Avenue SE
Washington, DC  20590
Phone: 202-493-0591
Fax: 202-366-4566
Browse Graphic None available
Associated Data Sets The data set, 'Gas and Liquid Pipelines, Minnesota Statewide Overview, 1996: Department of Public Safety, Office of Pipeline Safety', previously available from the State of Minnesota, is no longer available. Emergency officials and pipeline operators should instead request the National Pipeline Mapping System described in this metadata record.

Section 2 Data Quality
Attribute Accuracy The NPMS National Repository checks all entities and their attribute data for compliance with NPMS data standards. These checks do not ensure that NPMS data accurately reflects conditions in the field, only that the attributes meet database design specifications.
Logical Consistency The National Repository is responsible for ensuring 1) that all geospatial data are complete and correctly projected to the proper geodetic datum, 2) that the attribute data are compliant with the NPMS data standards. However, NPMS is built from contributions of data from pipeline operators. Operator contributions vary in many respects. Logical consistency of NPMS data cannot be guaranteed.
Completeness The NPMS represents hazardous liquid and gas transmission pipelines and LNG facilities under PHMSA jurisdiction. Distribution lines and gathering lines are not represented. The repository verifies each submitted dataset for completeness according to NPMS standards. The repository checks to ensure that all submissions include the required geospatial data, attribute data, and metadata. PHMSA makes every effort to ensure that the NPMS is complete and that pipeline and LNG facility operators comply with the NPMS Congressional mandate.
Horizontal Positional Accuracy Positional accuracy of plus or minus 500 feet has been attempted for all pipelines and LNG facilities. Actual positional accuracy depends on the spatial accuracy of the pipeline operators' submission. Thus, actual positional accuracy of NPMS data varies. Positional accuracy is indicated in the QUALITY_CD field found in both the pipeline and LNG facility attribute tables. Positional accuracy is designated as E, V, G, P, or U where E = Excellent: within 50 feet, V = Very Good: 50-300 feet, G = Good: 301-500 feet, P = Poor: 501-1000 feet, and U = Unknown.
Vertical Positional Accuracy N/A
Lineage Source materials:

Various pipeline operators. All pipeline and LNG facility datasets submitted to NPMS by pipeline operators for processing are required to originate from scale sources less than or equal to 1:24000. Metadata for individual pipeline systems indicate Source Scale.

Processing steps:

The NPMS data compilation process begins when a pipeline or LNG facility operator submits data to the National Repository. In total there are seven major steps in the NPMS process:

1. Operator Submission. The process starts when an operator sends information (termed submission) to the NPMS repository.
2. Repository Check-in. The repository logs the submission, scans digital submissions for viruses, inventories the submission, notifies operator of submission receipt, and initiates tracking procedures.
3. Metadata Review and Repair. The repository will review the metadata file that is supposed to accompany each NPMS submission. If problems exist with the metadata, the National Repository will work with the operator to complete the submission.
4. Data Conversion. Submissions with hard-copy geospatial data are separated from submissions with digital geospatial data. Hard-copy submissions are digitized, and digital submissions are translated. Attribute data is matched to the appropriate line features and reviewed for compliance with the standards. At the end of this step, the data will be in ARC/INFO format and ready for final processing.
5. Quality Assurance and Quality Control. Harvard Design and Mapping Inc. (HDM) performs an independent quality control review and reports findings back to the National Repository. HDM does not make repairs to the data. The repository must make repairs and resend the data to HDM. The process continues until HDM approves the submission.
6. Check Plot Review by Operators . The repository prepares a random selection of check plots for review by the submitting operator. Operators are asked to review and comment on the check plots.
7. Data Incorporation. The repository incorporates the data into the master database.

Section 3 Spatial Data Organization (not used in this metadata)

Section 4 Coordinate System
Horizontal Coordinate Scheme
Horizontal Datum NAD83
Horizontal Units

Section 5 Attributes
Overview Attributes in the NPMS pipeline data layer include:

PHMSA-assigned operator identification number
Operator name
System name
Subsystem name
Diameter (voluntary data element)
General commodities transported
Interstate/intrastate designation
Operating status (in service, abandoned, retired)
Geospatial accuracy estimate
Detailed Citation See:
for more entity and attribute information.
Table Detail:

Section 6 Distribution
Publisher U.S. Dept. of Transportation - Pipeline and Hazardous Materials Safety Administration (PHMSA)
Publication Date
Contact Person Information Katie Field , Project Manager
NPMS National Repository; Michael Baker Jr., Inc.
3601 Eisenhower Avenue, Suite 600
Alexandria, VA  22304
Phone: 703-317-6294
Fax: 703-960-9125
Distributor's Data Set Identifier npms
Distribution Liability Check with the US Department of Transportation, Pipeline and Hazardous Materials Safety Administration (PHMSA) for their distribution liability policy.
Ordering Instructions Viewers:

1. Public Viewer:

2. Restricted Viewer:
PIMMA (Pipeline Integrity Mapping and Management Application) is an online viewer that allows users to view the pipeline data directly on the NPMS website. This viewer is available to government officials for areas in which they provide data or have jurisdiction over. To apply for PIMMA, submit your state application here:

Due to security issues, pipeline data can only be released to pipeline operators and certified local, state, and federal government officials.

1. To apply to obtain raw GIS pipeline data (transmission pipeline data only) visit the following website for more details on the data available to you:

2. To submit a request for pipeline data, use the following application:

3. Also see the Frequently Asked Questions document:
Online Linkage None available

Section 7 Metadata Reference
Metadata Date 02/14/2014
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street
St. Paul, MN  55155
Phone: 651-201-2489
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version 1.2
Metadata Standard Online Linkage

This page last updated: 02/14/2014
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