| Cartography and 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 map conversions. CISU also has minor roles in taxing district annexations and Property Classification Memorandums (PCMs).
Map Conversions
Our conversion 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). These conversions will create seamless taxlot maps for each county.
Map Maintenance
Maintenance is 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 and new subdivisions, and property line adjustments to the existing maps. The 14 counties that currently have their maps maintained by the Cartographic Unit 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 Property Classification Memorandum (PCM) is a document that is required of all properties containing utilities (i.e., 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 writes the legal descriptions and outlines the maps for centrally assessed properties. CISU also updates the utility ownership books.
Annexations
Annexations occur when property is incorporated into a taxing district. This usually occurs when county property agrees to be annexed into the 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 others. The annexation process began with the Department of Revenue in 1975 with ORS 308.225. The 1,750 or so taxing districts are required to file a map, legal description, and approved resolution of the annexed property, with the Cartographic Unit 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 who then adds the property to the appropriate taxing district. CISU updates annexations that occur within the 14 maintenance counties.
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