WSDOT Information Technology DivisionThe Geodetic Survey Section within WSDOT has installed and maintains a majority of the primary (Geodetic) survey control used by the Department of Transportation in its ongoing construction and road maintenance programs. As part of this process the Survey Section maintains a Survey-Monuments database. The GIS file is updated nightly and sourced from a SQL database. Updates to the SQL database are irregular but the GIS data will be as recent as the most current version of the SQL database. This data is provided for mapping purposes only. This data does not contain the complete range of attributes and information that are available for each station within the database. If you need the physical geodetic coordinates for a monument, please obtain it from the database. Note: if you need the coordinates for a station for survey work you should use the coordinates shown in the datasheet for the station NOT the coordinates contained in this layer for the feature. This service is maintained by the WSDOT GIS & Roadway Data Office. If you are having trouble viewing the service, please contact OnlineMapSupport@wsdot.wa.gov.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/53675a65975b46299aaf211577b5dd26_0engState of Washington Geospatial Open Data PortalPublicWSDOT - Survey Monuments [Washington (State)]Web servicesWashington (State)Last Modified: 2025-10-07