WSDOT Online Map CenterThis layer uses event mapping to place all geodetic monuments maintained or owned by the Washington State Department of Transportation. The input table is exported daily at 2:00 AM from the production Survey Information System (SIS). 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/502551c8979f488095da2a4675d829ab_0engState of Washington Geospatial Open Data PortalPublicWSDOT - Survey Monuments - Map Image [Washington (State)]Web servicesWashington (State)Last Modified: 2026-01-08