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The files were then imported into ArcView, and merged together following Commission jurisdictional boundaries (North Coast, North Central Coast, Central Coast, South Central Coast, South Coast, and San Diego). The line work was originally georeferenced to the USGS Digital Raster Graphics (DRG) in Teale Albers projection. The data was later refined to the DRGs in UTM, Zones 10 and 11, NAD 83 meters. This file is intended to be displayed upon the UTM DRGs as a base map. In addition, the data was later attributed to help explain the basis of the mapped Coastal Zone.The boundary depicted in the attached file ('s) was digitized from the official 1:24,000 scale Coastal Zone Boundary maps, however, there are several important points to note about its use. The digital Coastal Zone Boundaries have not been adopted by the Commission, and do not supersede the official version of the Coastal Zone Boundary adopted by the Coastal Commission in March 1977 and amended from time to time since then. 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