OAR 734-005-0010: Oregon Coordinate Systems

(1) The Oregon State Plane Coordinate System of 1927 consists of two zones of mapping projections defined by the National Geodetic Survey of the National Ocean Service, one for the Oregon North Zone and one for the Oregon South Zone. (2) The Oregon State Plane Coordinate System of 1983 consists of two zones of mapping projections defined by the National Geodetic Survey of the National Ocean Service, one for the Oregon North Zone and one for the Oregon South Zone. (3) The Oregon Coordinate Reference System consists of multiple zones developed by an Oregon Department of Transportation committee of private and public land surveying, geographic information system, academic professionals and National Geodetic Survey (NGS) to define a system of low distortion mapping projections wherein distances computed between points on the grid plane will represent the distances measured between the same points on the ground within published zone tolerances. (a) OCRS 1983 (b) OCRS 2022