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State Route Mile Post Markers of Washington State
Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information
Identification Information
Section Index
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: 7/1/2012
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
Section Index
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
Section Index
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
Section Index
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
Section Index
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
Section Index
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 http://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
Section Index
Metadata Date: 6/24/2012
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
