Thurston GeoData CenterDue to an ESRI bug download is not working for this data, but you can download it here . This data was created, by David Smith & Associated under contract with Thurston County, to provide the county with a means of surface modeling, water shed delineation and other terrain issues. It was developed as part of the county's aerial program. It is comprised of black and white photography from a flight flown in June of 1996. The contours are relevant as of June 1996. Two Foot Contours of Thurston County, Washington. The following accuracy information was provided by David Smith and Associates. "All accuracies are in relation to the computed aero triangulation control and intended to be as follows: Elevation values: Vertical_Coordinate_System_Definition: Vertical_Datum_Name: NGVD 1929 Altitude_System_Definition: Altitude_Resolution: 1.000000 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Source_Scale_Denominator: 600 Type_of_Source_Media: Stereoscopic 1996 6ft pixel aerial photos.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/93eb499de2ad47b194c9f96db2476177_0engThurston GeoData CenterPublicThurston Contours 2ft [Washington (State)--Thurston County]Web servicesWashington (State)--Thurston CountyWashington (State)Last Modified: 2023-02-13