New York State Thruway Route System

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: New York State Thruway Authority

Publication_Date: 20050310

Title: New York State Thruway Route System

Edition: 2005

Geospatial_Data_Presentation_Form: Map

Publication_Information:

Publication_Place: Albany, New York

Publisher: New York State Thruway Authority, GIS

Online_Linkage: <https://www.nysgis.state.ny.us/s_thruway/nythruway.zip>

Description:

Abstract:

Statewide geodatabase of all roads maintained by the New York State Thruway Authority. The file includes dynamic segmentation route systems (constructed with ESRI's ArcInfo software), designed to represent the Thruway Authority's milepost linear referencing system. The bi-directional thruway route system represents each direction of travel as a separate route. There is also a centerline route system, a combined bi-directional and centerline, as well as one each for ramps, service area roads, and crossovers.

Purpose:

A GIS layer representing the roadways for which the NY State Thruway Authority maintains maintenance jurisdiction. This is a calibrated route system that was created so that dynamic segmentation utilities could be used to locate information based on the field-posted Thruway mileposts.

Supplemental_Information:

Positional accuracy of data is approximately 1:8000 scale. Zone 18 of the UTM grid/projection system (Zone 18 is extended to cover New York State entirely in a single grid zone).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2001

Ending_Date: Present

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Continually

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -79.76

East_Bounding_Coordinate: -73.41

North_Bounding_Coordinate: 43.13

South_Bounding_Coordinate: 40.84

Keywords:

Theme:

Theme_Keyword_Thesaurus: NYS GIS Clearinghouse categories

Theme_Keyword: Infrastructure or ground transportation

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword:

Thruway, highway, road, route, interstate, milepost, marker, Mainline, I-84, New England Section, Cross Westchester Expressway, Garden State Parkway Connector, Berkshire Spur, Niagara Section

Place:

Place_Keyword_Thesaurus: None

Place_Keyword:

New York State, Albany County, Bronx County, Cayuga County, Chautauqua County, Columbia County, Dutchess County, Erie County, Genesee County, Greene County, Herkimer County, Madison County, Monroe County, Montgomery County, Niagara County, Oneida County, Onondaga County, Ontario County, Orange County, Rensselaer County, Rockland County, Schenectady County, Seneca County, Ulster County, Westchester County.

Access_Constraints: None

Use_Constraints: None

Browse_Graphic:

Browse_Graphic_File_Name: Not applicable

Browse_Graphic_File_Description: Not applicable

Browse_Graphic_File_Type: Not applicable

Native_Data_Set_Environment: ArcGIS

Data_Quality_Information:

Logical_Consistency_Report:

Data has topology and is topologically clean. Lines do not break for linework that crosses, but has no real-world connections (e.g., ramp bridges over roadways, centerlines, etc.)

Completeness_Report:

Linework covers the all roadways that are owned or maintained by the New York State Thruway Authority. All interchange ramps service area roads, and crossover roads are included (crossovers are generalized to lines perpendicular to the roadway, due to difficulties driving these roads). A handful of ramps not owned or maintained by the Thruway Authority are included, for complete depiction of an interchange. The major route system used for the display of event data with dynamic segmentation is called THRUWAY. This models the Thruway's field-posted milepost system. Milepost routes are attributed with a standardized abbreviation for the route identifier, the travel direction of the roadway, route's from and to measure, the signed route number, the full name of the route, a route field (combined abbreviation and direction to uniquely identify each route), a from_meas and to_meas field (which indicate the milepost ranges on the signs - [these do not include offsets]), and a common name that describes the roadway. Another route system, CENTERLINE, has the same attributes, but shows only a centerline of the roadways, disregarding direction of travel. There is also TWY_BI_CTR, which is a combination of the two. The measurements for each route are unique, using the Thruway's official milepost numbers that, for non-mainline highways, include an offset value added to the field posted number. The highways, their abbreviations, and offsets follow: (Mainline, ML, 0); (I-84, 84, 500); (New England Section, NE, 600); (Cross Westchester Expressway, CW, 620); (Garden State Parkway Connector, GS, 640); (Berkshire Spur, B, 800); and (Niagara Section, N, 900). The RAMPS system shows ramps, with names and measurements that may be field-posted at a future date. CROSSOVERS, and SERVICE route systems were mostly created for ease of displaying these features, as data is not typically maintained on these alignments using a linear referencing system.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Data was field collected with a vehicle-mounted (right side of vehicle) Trimble Pathfinder Pro XRS GPS receiver. Vehicle drove at approximately 60 miles/hr. Data was real-time corrected using Coast Guard NAV beacon signal, and recorded using the DMA 10x10 Geoid. At a later point, it was adjusted in areas to match orthoimagery that was +/- 4' positonal accuracy.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 2.0 m

Horizontal_Positional_Accuracy_Explanation: No quantitative tests

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: Not applicable

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0

Vertical_Positional_Accuracy_Explanation: Not applicable

Lineage:

Process_Step:

Process_Description:

In June 2001, Miller Management, with a subcontractor, drove the roadways with a vehicle-mounted GPS receiver. All Thruway-owned and Thruway-maintained roads were included. This was done to satisfy the data needs of the mapping component to the Thruway's Computer Aided Dispatch (CAD) project, and to provide a base for a bi-directional GIS route system. Some supplemental driving was done in August 2001, to collect some additional ramp alignments. A Trimble Pathfinder Pro XRS GPS receiver was used, mounted to the right side of the vehicle, over the rightmost painted edge of the right lane. This was done for all roadways, and both directions of travel. The vehicle drove at approximately 60 miles/hr. Data was recorded using the DMA 10x10 Geoid, and real-time corrected using the U.S. Coast Guard NAV beacon signal. This data was then processed, and converted to an ESRI shapefile in UTM, Zone 18 extended, NAD 83 coordinates. These lines were then attributed with values specific to the CAD project. Individual line segments were split only where a physical connection with another line existed (e.g., a ramp hitting the main roadway), or where an attribute changed (by measurement along the graphic from known bridge mileposts). This data was then delivered to the Thruway Authority. In December, the file was converted to an ArcInfo coverage. Topology problems with the arcs were manually edited, and 16 routes were built - one for each road/direction combination. The beginning and ending measures of each roadway were set to match the Thruway's official milepost system. The entire system was then calibrated to a coverage of overhead bridge point locations (also collected from CAD), with known measurements (from the Thruway?s Infrastructure Inventory and Inspection System). Any resulting problems were manually edited. Using ArcInfo software, a centerline was automatically generated, and calibrated the same way. Uncalibrated routes were also built and attributed for the ramps, service area roads, and U-turns. A correction was made to the measures on the New England Section in January 2002. In April 2002, the Berkshire Spur and New England Section routes were slightly extended, and two ramps on I_84 were renamed. Route attributes were also slightly modified, a new route system was added that combines the bi-directional and centerline routes, and the route.u_turns subclsss was renamed to crossovers. In February 2003, 2 new routes - ML-NW and ML-SE were added to route.thruway and route.twy_bi_ctr, to accomodate data that spans milepost 148.15, where the Thruway changes from N/S to E/W. Linework was also modified for one of the crossovers, and the arc IDs were changed to match unique_id. In August 2003, the entire coverage was converted to a geodatabase format. Then, using orthoimagery, the alignment of the Southbound Niagara section was realigned to match the white line separating driving lane and shoulder. Ramp alignments across the system were also updated, and in places renamed at this time. Duplicate service area roads were removed, as were arc and node feature types. In February 2005, several chnages were made to make minor corrections, add new road and ramp alignments at Interchange 8, and added FROM_MEAS, TO_MEAS, and COMMON_NAME attributes, and slightly altered some other attribute definitions.

Process_Date: 20050225

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation:

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation:

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Complete chain

Point_and_Vector_Object_Count: 4663

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Node, planar graph

Point_and_Vector_Object_Count: 4001

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 4

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Composite object

Point_and_Vector_Object_Count: 7

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Composite object

Point_and_Vector_Object_Count: 360

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Composite object

Point_and_Vector_Object_Count: 960

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Composite object

Point_and_Vector_Object_Count: 132

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Composite object

Point_and_Vector_Object_Count: 18

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Composite object

Point_and_Vector_Object_Count: 25

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 18

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -75.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: Coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.61

Ordinate_Resolution: 0.61

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.25

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.aat

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: FNODE#

Attribute_Definition: Internal node number for the beginning of an arc (from-node).

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: TNODE#

Attribute_Definition: Internal node number for the end of an arc (to-node).

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: LPOLY#

Attribute_Definition: Internal node number for the left polygon.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: RPOLY#

Attribute_Definition: Internal node number for the right polygon.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Whole numbers that are automatically generated.

Attribute:

Attribute_Label: LENGTH

Attribute_Definition: Length of feature in internal units.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: NYTHRUWAY#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: NYTHRUWAY-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: UNIQUE_ID

Attribute:

Attribute_Label: STREETNAME

Attribute:

Attribute_Label: PREFIX

Attribute:

Attribute_Label: HWY_NUMBER

Attribute:

Attribute_Label: DIVISION

Attribute:

Attribute_Label: RTE_ABBR

Attribute:

Attribute_Label: COMMENTS

Attribute:

Attribute_Label: CODE

Attribute:

Attribute_Label: INTERCHANG

Attribute:

Attribute_Label: ROUTE

Attribute:

Attribute_Label: DATE_MOD

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.nat

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: ARC#

Attribute:

Attribute_Label: NYTHRUWAY#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: NYTHRUWAY-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.ratcenterline

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: CENTERLINE#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: CENTERLINE-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: RTE_ABBR

Attribute:

Attribute_Label: DIRECTION

Attribute:

Attribute_Label: HWY_NUMBER

Attribute:

Attribute_Label: NAME

Attribute:

Attribute_Label: ROUTE

Attribute:

Attribute_Label: RF-MEAS

Attribute:

Attribute_Label: RT-MEAS

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.ratcrossovers

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: CROSSOVERS#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: CROSSOVERS-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: NAME

Attribute:

Attribute_Label: RTE_ABBR

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.ratramps

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: RAMPS#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: RAMPS-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: NAME

Attribute:

Attribute_Label: RTE_ABBR

Attribute:

Attribute_Label: INTERCHANGE

Attribute:

Attribute_Label: FROM

Attribute:

Attribute_Label: TO

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.ratservice

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: SERVICE#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: SERVICE-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: NAME

Attribute:

Attribute_Label: ROUTE

Attribute:

Attribute_Label: COMMENTS

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.ratthruway

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: THRUWAY#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: THRUWAY-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: RTE_ABBR

Attribute:

Attribute_Label: DIRECTION

Attribute:

Attribute_Label: HWY_NUMBER

Attribute:

Attribute_Label: NAME

Attribute:

Attribute_Label: ROUTE

Attribute:

Attribute_Label: RF-MEAS

Attribute:

Attribute_Label: RT-MEAS

Detailed_Description:

Entity_Type:

Entity_Type_Label: nythruway.rattwy_bi_ctr

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: TWY_BI_CTR#

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: TWY_BI_CTR-ID

Attribute_Definition: User-defined feature number.

Attribute_Definition_Source: ESRI

Attribute:

Attribute_Label: RTE_ABBR

Attribute:

Attribute_Label: DIRECTION

Attribute:

Attribute_Label: HWY_NUMBER

Attribute:

Attribute_Label: NAME

Attribute:

Attribute_Label: ROUTE

Attribute:

Attribute_Label: RF-MEAS

Attribute:

Attribute_Label: RT-MEAS

Attribute:

Attribute_Label: TYPE

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: New York State Thruway Authority, GIS

Contact_Position: Eric A. Herman

Contact_Address:

Address_Type: Mailing and physical address

Address: 200 Southern Blvd

City: Albany

State_or_Province: New York

Postal_Code: 12209

Country: USA

Contact_Voice_Telephone: (518) 471-5890

Contact_Facsimile_Telephone: (518) 436-3068

Contact_Electronic_Mail_Address: eric_herman@thruway.state.ny.us

Resource_Description: nythruway

Distribution_Liability: None

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: MDB

Transfer_Size: 2.470

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Fees:

Available for free electronic download through the NYS GIS Clearinghouse <http://www.nysgis.state.ny.us>.

Metadata_Reference_Information:

Metadata_Date: 20030825

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Eric A. Herman

Contact_Person: REQUIRED: The person responsible for the metadata information.

Contact_Address:

Address_Type: Mailing and physical address

Address: 200 Southern Blvd

City: Albany

State_or_Province: New York

Postal_Code: 12209

Country: USA

Contact_Voice_Telephone: (518) 471-5890

Contact_Facsimile_Telephone: (518) 436-3068

Contact_Electronic_Mail_Address: eric_herman@thruway.state.ny.us

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage:

Profile_Name: ESRI Metadata Profile