Cartography and Geographic Information System (GIS)

**If you are looking for our interactive web maps, the link is located under our Quick Links or at the bottom of the page as Columbia County Web Maps.**

Cartography

The cartography section of the Assessor's Office is responsible for tracking ownership of all real property in the county and maintaining a complete set of tax lot maps. All documents recorded in the County Clerk's Deed Records are reviewed to determine if they involve a change in property ownership or property description. This section has been converting from Mylar mapping to digital mapping and has incorporated many layers of data for our GIS program.

The ORMAP (the Oregon Map) project will develop a statewide property tax parcel base map that is digital, publicly accessible, and continually maintained. This move from paper to computer-based mapping will help and improve the administration of the property tax system. For more information, visit ORMAP.

Geographic Information System (GIS) Shape and Data Files

These files are the current Assessment and Taxation shape and data files for Columbia County, Oregon.

They are updated bi-weekly, provided to you free of charge, and without warranty. As such, Columbia County assumes you have a working knowledge necessary to utilize these files and does not have the resources to provide you any support beyond this document.

The shape files have been created for Assessment and Taxation purposes only and may not be suitable for any other purposes.

• The Values are the current Certified Values.
• The main table is RealProp_T
• The key field in taxlot25.shp is Map_taxlot and can be joined to the key field in RealProp_T (Tax25.mdb) which is MAP_TAXLOT.
• Data projection is NAD '83-'91, Oregon State Plain, Zone North
• Units are International Feet

By downloading the files below, you agree to our License Agreement.

GIS Data Files

• Tax25 ZIP File

* This ZIP file contains Tax25.mdb, Tax25.accdb, taxlot25.dbf, taxlot25.prj, taxlot25.shp, and taxlot25.shx files * **UPDATED: ZIP file also contains individual DBF files of the tables exported from the MDB for easier integration with ArcGIS Pro**

To open these files, click the ZIP file link above and choose where you would like to save the zipped files. Next, navigate to your downloaded ZIP file and double click to open it and see the files it contains. From here, you can choose to "Extract All" and save the unzipped files in the location of your choosing.