State Route Mile Post Markers of Washington State

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: Washington State Department of Transportation

Publication_Date: 20120702

Title: State Route Mile Post Markers of Washington State

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Olympia, Washington, USA

Publisher: Washington State Department of Transportation (WSDOT)

Description:

Abstract:

This dataset contains two sources used to determine X, Y coordinates for positions along Washington State highways perpendicular to milepost markers. Locations were collected on the fly from a moving vehicle using Global Positioning Systems (GPS) technology, and using Geographic Information Systems (GIS) processes, the Washington State Department of Transportation (WSDOT) 24k Linear Referencing System (LRS) and the WSDOT Traffic Signs Management Systems database (TSMS).

Purpose:

Provide location reference along Washington State Highways for such uses as: routing, vehicle tracking, emergency services, traffic safety, and WSDOT project planning and management.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20120701

Time_of_Day: Unknown

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Annually

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.672354

East_Bounding_Coordinate: -116.863256

North_Bounding_Coordinate: 49.031803

South_Bounding_Coordinate: 45.505186

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Milepost

Theme_Keyword: State Route

Theme_Keyword: Transportation Data

Theme_Keyword: Highway

Theme_Keyword: Milepost Paddles

Theme_Keyword: Safety

Theme_Keyword: Milepost Markers

Theme_Keyword: Navigation

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Washington State

Place_Keyword: WA

Place_Keyword: United States

Place_Keyword: USA

Place_Keyword: Pacific Northwest

Place_Keyword: Washington

Access_Constraints: None

Use_Constraints:

Due to the diverse sources of this data, accuracy varies within the dataset and is relative to the purpose stated above. Also, this data may have changed since the publication date. If you find an error with this data and can provide updated information, please contact the GIS and Roadway Data Office at (360) 570-2363 or fax (360) 570-2400.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Thomas A. Blake

Contact_Organization: Washington State Department of Transportation

Contact_Position: Data Products Supervisor

Contact_Address:

Address_Type: physical address

Address: 7345 Linderson Way SW

City: Tumwater

State_or_Province: WA

Postal_Code: 98501-7384

Country: USA

Contact_Voice_Telephone: (360) 570-2363

Contact_Electronic_Mail_Address: blaket@wsdot.wa.gov

Data_Set_Credit:

Roadway Branch, Transportation Data Office, Washington State Department of Transportation Transportation Signs Management System, Washington State Department of Transportation

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000

Data_Quality_Information:

Completeness_Report:

This dataset represents all State Routes in Washington State. However, milepost markers are not present for every mile. Milepost markers were collected in the field or from a query of the TSMS database.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

This dataset contains two sources used to determine X,Y coordinates for positions along state highways perpendicular to milepost markers. The dataset contains a field indicating the source. Source 1 was collected with GPS from a moving vehicle as a single point. Source 2 was obtained through GIS processes using a 24k LRS and data from the Traffic Sign Management System. Source 1 data points with a directional indicator of 'b' have an average accuracy of +/- one-hundredth of a mile (52.8 ft.). Source 1 data points with a directional indicator of 'i' or 'd' have an average accuracy of +/- two-hundredths of a mile (105.6 ft). Source 2 data points have an unknown accuracy.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Elevations were obtained using resource grade GPS equipment and have an average accuracy of +/- fifteen feet. Data points from source 2 data have no elevation associated with them and a placeholder of 99999.99 was used.

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 99999.99

Vertical_Positional_Accuracy_Explanation: Source 2 value not applicable, null placeholder.

Lineage:

Process_Step:

Process_Description:

Initial data collection was performed with GPS technology on the fly from moving vehicles. Data was collected in the increasing and decreasing direction of travel as a single point while passing perpendicularly to each milepost marker. The milepost markers along undivided highways were collected twice, once in each direction where possible. The milepost markers along divided highways were collected once in the direction of travel, where possible.
The GPS data was post processed and exported with Pathfinder Office into a text file for each state route. New data fields were added: State Route ID (identification) and ARM (actual route mileage) values were derived from the WSDOT 24k LRS dataset. The increasing and decreasing files of each route were joined together geospatially using the nearest function, and two tables were produced. This data was then validated, the average distance field was created, and a single table was produced. An SRMP value was obtained using the ArmCalc module to determine the MP_value.
For source 2 mileposts, the TSMS database was queried for milepost markers. This dataset was compared to the source 1 data and duplicates were removed. ARM values were obtained from the SRMP values given in the TSMS database using ARMCalc and then placed on the WSDOT's 24k LRS. X,Y coordinates were obtained for these points using ESRI's GIS software.
The source 1 and source 2 data sets were combined into a single file, placed as an event theme using the longitude and latitude coordinate fields, and then exported as a shapefile. This shapefile was projected from GCS NAD83 to GCS NAD 83 HARN. New NAD 83 HARN coordinates were generated with the ESRI AddXY command and loaded into the longitude and latitude fields.

Process_Date: 2005

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jason Stambaugh or Jason Moxham

Contact_Organization:

Washington State Department of Transportation, Transportation Data Office, Roadway Branch

Contact_Position: Transportation Planning Tech 3

Contact_Voice_Telephone: (360) 570-2359 Jason Stambaugh, (360) 570-2437 Jason Moxham

Contact_Electronic_Mail_Address: stambaj@wsdot.wa.gov,moxhamj@wsdot.wa.gov

Process_Step:

Process_Description:

Changes to the geographic location of mile post markers as reported in the TSMS data base were processed using GIS software and new coordinates established. An updated event theme was created and processed as in step one.

Process_Date: 20101202

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Thomas A. Blake

Contact_Organization:

Washington State Department of Transportation, GIS and Roadway Data Office

Contact_Position: Data Products Supervisor

Contact_Address:

Address_Type: physical address

Address: 7345 Linderson Way SW

City: Tumwater

State_or_Province: WA

Postal_Code: 98501-7384

Country: USA

Contact_Voice_Telephone: (360) 570-2363

Contact_Electronic_Mail_Address: blaket@wsdot.wa.gov

Process_Step:

Process_Description:

Updates were made to the Region attribute of Milepost Markers along US 12 due to a WSDOT region boundary adjustment between the Southwest and South Central Regions

Process_Date: 20120624

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Thomas A. Blake

Contact_Organization: Washington State Department of Transportation

Contact_Position: Data Products Supervisor

Contact_Address:

Address_Type: physical address

Address: 7345 Linderson Way SW

City: Tumwater

State_or_Province: WA

Postal_Code: 98501-7384

Country: USA

Contact_Voice_Telephone: (360) 570-2363

Contact_Electronic_Mail_Address: blaket@wsdot.wa.gov

Cloud_Cover: 0

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 7885

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0

Longitude_Resolution: 0

Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_North_American_1983_HARN

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257222

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Resolution: 1.000000

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: wastate_mp_SPS

Entity_Type_Definition:

Points indicate locations perpendicular to milepost markers along Washington State Highways.

Attribute:

Attribute_Label: AB

Attribute_Definition:

Ahead Back Indicator, An indicator that denotes if the Linear Referencing Method (Trafficway) State Route Milepost is within a Back Mileage Equation Area

Attribute_Definition_Source: Washington State Department of Transportation Data Catalog

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: A

Enumerated_Domain_Value_Definition: Ahead indicator

Enumerated_Domain:

Enumerated_Domain_Value: B

Enumerated_Domain_Value_Definition: Back indicator

Attribute:

Attribute_Label: COMMENTS

Attribute_Definition: Comment field for use during data updates.

Attribute:

Attribute_Label: DIRECTION

Attribute_Definition:

For data with source code of 1, indicates the direction of travel the data was collected in. For data with source code of 2, indicates the 24k LRS dataset used.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: i

Enumerated_Domain_Value_Definition:

Data collected in the increasing lane of travel with GPS or placed on a increasing 24k LRS.

Enumerated_Domain:

Enumerated_Domain_Value: d

Enumerated_Domain_Value_Definition:

Data collected in the decreasing lane of travel with GPS or placed on a decreasing 24k LRS.

Enumerated_Domain:

Enumerated_Domain_Value: b

Enumerated_Domain_Value_Definition:

Data collected in both directions of travel using GPS for a single milepost marker.

Attribute:

Attribute_Label: DISTANCE

Attribute_Definition:

The average distance between the two positions collected using GPS for the same milepost marker.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 99999.99

Enumerated_Domain_Value_Definition: Placeholder for a null value

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: HAE

Attribute_Definition:

Height Above Ellipsoid - The vertical distance in feet above or below a reference ellipsoid. For WSDOT this reference ellipsoid is designated WGS84.

Attribute_Definition_Source: Roadway Location Data Dictionary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 99999.99

Enumerated_Domain_Value_Definition: Null value placeholder

Attribute:

Attribute_Label: LATITUDE

Attribute_Definition:

The degree of latitude above the equator represented by a 2 digit number of degrees from 00 to 90 and fractions of degrees with 6 decimal places. Only applies to the northern hemisphere. Values in this field are NAD83 HARN.

Attribute_Definition_Source: Roadway Location Data Dictionary

Attribute:

Attribute_Label: LONGITUDE

Attribute_Definition:

The degree of longitude west of Greenwich, England, represented by a 3 digit number of degrees from 000 through 180 and decimal fractions of degrees with 6 decimal places. East longitudes are not included. Values in this field are NAD83 HARN

Attribute_Definition_Source: Roadway Location Data Dictionary

Attribute:

Attribute_Label: MP_VALUE

Attribute_Definition:

Milepost Value indicates the number that appears on the milepost marker.

Attribute:

Attribute_Label: OBJECTID

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: REF_DATE

Attribute_Definition: Date the individual points were valid.

Attribute:

Attribute_Label: REGION

Attribute_Definition:

Region - The geographic and administrative areas of responsibility of the Washington State Department of Transportation within the State of Washington.

Attribute_Definition_Source: Washington State Department of Transportation Data Catalog

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: NC

Enumerated_Domain_Value_Definition:

North Central Region - Washington State Department of Transportation

Enumerated_Domain:

Enumerated_Domain_Value: OL

Enumerated_Domain_Value_Definition: Olympic Region - Washington State Department of Transportation

Enumerated_Domain:

Enumerated_Domain_Value: NW

Enumerated_Domain_Value_Definition:

Northwest Region - Washington State Department of Transportation

Enumerated_Domain:

Enumerated_Domain_Value: SW

Enumerated_Domain_Value_Definition:

Southwest Region - Washington State Department of Transportation

Enumerated_Domain:

Enumerated_Domain_Value: SC

Enumerated_Domain_Value_Definition:

South Central Region - Washington State Department of Transportation

Enumerated_Domain:

Enumerated_Domain_Value: EA

Enumerated_Domain_Value_Definition: Eastern Region - Washington State Department of Transportation

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: SOURCE

Attribute_Definition: Indicates how the X,Y coordinates where obtained.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition: Data collected with GPS

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition:

X,Y coordinates derived from the 24k LRS, using values from the Traffic Signs Management System database

Attribute:

Attribute_Label: SR

Attribute_Definition:

Washington State Highways are defined by the following: State Route (SR) number, Related Roadway Type (RRT) and Related Roadway Qualifier (RRQ). These three descriptors uniquely identify and every piece of the highway system in Washington State. For definitions of SR, RRT and RRQ see the WSDOT metadata for the GIS Roadlog dataset

Attribute_Definition_Source: The Washington State Highway Log

Overview_Description:

Entity_and_Attribute_Overview:

This data set contains milepost marker values, elevations, WSDOT region indicators, data source information, State Route indicators.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

Washington State Department of Transportation, Office of Information Technology

Contact_Person: Jordyn Mitchell

Contact_Position: GIS Database Administrator

Contact_Address:

Address_Type: mailing address

Address: PO Box 47430

City: Olympia

State_or_Province: WA

Postal_Code: 98504-7430

Country: USA

Contact_Voice_Telephone: 360-705-7645

Contact_Electronic_Mail_Address: mitchejo@wsdot.wa.gov

Distribution_Liability:

The Washington State Department of Transportation shall not be liable for any activity involving this data with regard to lost profits or savings or any other consequential damages; or the fitness for use of the data for a particular purpose; or the installation of the data, its use, or the results obtained.

Standard_Order_Process:

Fees: none

Ordering_Instructions:

Download individual data sets from <https://www.wsdot.wa.gov/mapsdata/geodatacatalog/default.htm>

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: Unknown

Time_of_Day: Unknown

Metadata_Reference_Information:

Metadata_Date: 20120624

Metadata_Review_Date:

Metadata_Future_Review_Date:

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Thomas A. Blake

Contact_Organization: Washington State Department of Transportation

Contact_Position: Data Products Supervisor

Contact_Address:

Address_Type: physical address

Address: 7345 Linderson Way SW

City: Tumwater

State_or_Province: WA

Postal_Code: 98501-7384

Country: USA

Contact_Voice_Telephone: (360) 570-2363

Contact_Electronic_Mail_Address: blaket@wsdot.wa.gov

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: none

Metadata_Use_Constraints: none

Metadata_Security_Information:

Metadata_Security_Classification: Unclassified

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile