NH Public Roads

Identification_Information:

Citation:

Citation_Information:

Originator: NHDOT Bureau of Planning & Community Assistance
Publication_Date: 20241010
Title: NH Public Roads
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:

Publication_Place: Concord, New Hampshire
Publisher:

NH Department of Transportation, Bureau of Planning & Community Assistance

Other_Citation_Details: NHDOT 2024 Quarterly Snapshot
Online_Linkage:

https://nhgeodata.unh.edu/nhgeodata/rest/services/Topical/GV_BaseLayers/MapServer/18

Online_Linkage:

https://ftp.granit.sr.unh.edu/GRANIT_Data/Vector_Data/Transportation_Networks/d-roads/

Description:

Abstract:

Statewide dataset containing the location of state, local and selected private roads and their associated attributes, including road names. For attribute data dictionary, see the file RDIUserGuide.pdf

Purpose:

The data may be used to map the statewide road network, and/or to query for physical and administrative features of individual road segments.

Supplemental_Information:

Data distribution tile: statewide

NH Public Roads represents the most frequently distributed dataset. Additional transportation-related datasets may be available directly from NHDOT.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20241010

Currentness_Reference: NHDOT road network as of October 10, 2024

Status:

Progress: Complete
Maintenance_and_Update_Frequency: Quarterly

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -72.593213
East_Bounding_Coordinate: -70.675318
North_Bounding_Coordinate: 45.285680
South_Bounding_Coordinate: 42.693946

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Public Roads
Theme_Keyword: Road Inventory
Theme_Keyword: Roads
Theme_Keyword: Private Roads
Theme_Keyword: State Roads
Theme_Keyword: Road Network
Theme_Keyword: Transportation
Theme_Keyword: Transportation Networks

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Northeast
Place_Keyword: New England
Place_Keyword: New Hampshire

Access_Constraints:

This data set is the property of the State of New Hampshire and is available for public use under the State's Right-to-Know laws.

Use_Constraints:

This data set is under continual review and is not guaranteed to be free of errors or omissions.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Glenn L Davison, PE
Contact_Organization: NHDOT Bureau of Planning & Community Assistance

Contact_Position: GIS Project Manager
Contact_Address:

Address_Type: mailing and physical address
Address:

NH Department of Transportation, Bureau of Planning & Community Assistance

Address: PO Box 483, 7 Hazen Drive
City: Concord
State_or_Province: NH
Postal_Code: 03301-0483

Contact_Voice_Telephone: (603)271-7145
Contact_Facsimile_Telephone: (603)271-8093
Contact_Electronic_Mail_Address: gdavison@dot.state.nh.us
Hours_of_Service: 8 AM to 4:30 PM

Data_Set_Credit:

New Hampshire Department of Transportation, Bureau of Planning & Community Assistance

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attributes are collected by field inspection and verified by logical and visual validation.

Logical_Consistency_Report:

The data set was generated from a centerline base layer that is part of a geodatabase topology

Completeness_Report:

These data represent statewide coverage, although they are continually being updated and enhanced.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The coordinate data were generated from standard USGS 1:24,000/1:25,000-scale Digital Line Graphs, augmented by and improved with data collected by GPS and post-processed. They meet National Map Accuracy standards.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Vertical positional accuracy is not assessed.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

US Geological Survey or another mapping agency in cooperation with USGS

Publication_Date: 19900101
Title: Digital Line Graphs - 1:24,000/1:25,000
Edition: 1
Geospatial_Data_Presentation_Form: Map
Publication_Information:

Publication_Place: Reston, VA
Publisher: US Geological Survey

Other_Citation_Details: None
Online_Linkage: http://earthexplorer.usgs.gov
Larger_Work_Citation:

Citation_Information:

Originator: US Geological Survey
Publication_Date: Unknown
Title: National Cartographic Database
Publication_Information:

Publication_Place: Reston, VA
Publisher: US Geological Survey

Online_Linkage: http://www.usgs.gov

Source_Scale_Denominator: 24000
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19530101
Ending_Date: 19900101

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: DLG-3
Source_Contribution:

The DLG files provided the basic coordinate information for the statewide road network.

Process_Step:

Process_Description:

Roadway centerline for the state system has been re-aligned to the state's 2010 high-resolution ortho imagery (1 foot resolution) or updated using sub-meter GPS coordinates. Local roadway network is being updated to the 2010 imagery.

Road names are being coordinating with New Hampshire Department of Safety, Emergency Management E-911.

Current Projection NH State Plane 83

Source_Used_Citation_Abbreviation: NHDOT SDE Highway_Roads Feature Class
Process_Date: Unknown
Source_Produced_Citation_Abbreviation: NH Public Roads

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 112,575

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Transverse Mercator
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999967
Longitude_of_Central_Meridian: -71.666667
Latitude_of_Projection_Origin: 42.500000
False_Easting: 984250.000000
False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.000328
Ordinate_Resolution: 0.000328

Planar_Distance_Units: survey feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

For a complete description of the attribute information, see the file 2018RDIUserGuide_Oct30.pdf

Entity_and_Attribute_Detail_Citation: See 2018RDIUserGuide_Oct30.pdf

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Earth Systems Research Center, University of New Hampshire
Contact_Person: GRANIT Database Manager

Contact_Position: GRANIT Database Manager
Contact_Address:

Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824

Contact_Voice_Telephone: 603-862-1214
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 9 AM - 5 PM, EST

Resource_Description: Downloadable Data
Distribution_Liability:

These digital data represent the efforts of the NH Department of Transportation to deliver an accurate statewide road network with updated road inventory information. No claim is made as to the validity or reliability or to any implied uses of these data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ESRI Shapefile
Transfer_Size: 306

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM
Recording_Format: ESRI Shapefile

Fees:

No charge when downloaded from website. Cost of reproduction for provision on CD/DVD or other media.

Metadata_Reference_Information:

Metadata_Date: 20241010
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Glenn L Davison, PE
Contact_Organization: NHDOT Bureau of Planning & Community Assistance

Contact_Position: GIS Project Manager
Contact_Address:

Address_Type: mailing and physical address
Address:

NH Department of Transportation, Bureau of Planning & Community Assistance

Address: PO Box 483, 7 Hazen Drive
City: Concord
State_or_Province: NH
Postal_Code: 03301-0483

Contact_Voice_Telephone: (603)271-7145
Contact_Facsimile_Telephone: (603)271-8093
Contact_Electronic_Mail_Address: gdavison@dot.state.nh.us

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints:

This data set is the property of the State of New Hampshire and is available for public use under the state Right-to-Know laws.

Metadata_Use_Constraints:

This data set is under continual review and is not guaranteed to be free of errors or omissions.

Metadata_Extensions:

Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile

NH Public Roads

Metadata: