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Cartography & Maps
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Our Cadastral Information Systems Unit (CISU) establishes and maintains statewide cadastral mapping standards. The unit also assists in the preparation and maintenance of individual assessor's maps. The unit achieves this by assisting 14 of the 36 Oregon counties with their daily map maintenance, and performing countywide digital remapping. CISU also has minor roles in taxing district annexations and Property Classification Memorandums (PCMs).
Digital remapping
Our remapping projects are partnerships between the counties and the Department of Revenue. The purpose of these projects is to convert the various county paper taxlot maps into a digital format to be used in a Geographic Information System (GIS), and to bring the accuracy of these maps within national standards. These projects create seamless taxlot maps for each county which are of the highest quality. Try this link to find out more about remapping in Oregon and to search the ORmap online database for maps and taxlot information
Map maintenance
CISU is currently responsible for maintaining and updating taxlot maps for the 14 counties that have no cartographic staff. The majority of maintenance work consists of adding partition plats, new subdivisions, and property line adjustments to the existing maps. The 14 counties that currently have their maps maintained by CISU are Baker, Crook, Curry, Gilliam, Grant, Hood River, Lake, Morrow, Malheur, Sherman, Union, Wallowa, Wasco, and Wheeler. Questions regarding county properties should be directed to the county offices.
Property Classification Memorandums (PCM)
CISU assists the Utility Team (see Utility Property) with the maintenance of the Property Classification Memorandum files. A PCM is a document that is required of all properties containing utilities (for example: railroads, power companies, and pipelines) when the property alters its use or changes ownership. A PCM contains a legal description and map of the property along with ownership and property status information. The Utility Team determines whether a property is centrally assessed or locally assessed. Locally assessed properties are those that no longer house any utilities and are maintained by their respective counties. CISU reviews the legal descriptions and outlines the maps for centrally assessed properties.
Boundary Changes
Taxing district boundary changes occur when property is incorporated into or removed from a taxing district or districts. This often occurs when county property agrees to be annexed into a city. This process also includes withdrawals, transfers from one district to another, and formations of new districts. Taxing districts include cities, rural fire districts, lighting districts, library districts, and many others. Our role in the boundary change process began in 1975 with ORS 308.225. The 1,750 or so taxing districts within Oregon are required to file a map, legal description, and approved resolution of the annexed property, with the CIS Unit (and the county assessor) by March 31 for that ensuing fiscal year. CISU checks the maps, descriptions, and ordinances for compliance and accuracy. Once the annexations are approved by CISU notice is sent to the county assessor who then adds the property to the appropriate taxing district.
For more information:
Frequently asked questions about boundary changes
Boundary changes overview publication
Oregon cadastral map system "manual"
Notice from taxing districts
E-mail us with questions
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