GeoWorld February 2012

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BY RACHEL LYLES SMITH Advancing Geology From Data Creation to Map Production nologies and migrating its geologic map-production techniques to take advantage of them. During the last two years, DOGAMI transformed its map-produc- tion process, including data creation, data storage, basemap development and cartographic symbology/ representation. The new process streamlines data storage, revision and retrieval, and it allows traditional paper-based maps to be created more efficiently. Many surveys across the United States continue L to make traditional 1:24,000-scale U.S. Geological Survey (USGS) quadrangle-based geologic maps and store large numbers of paper maps that contain the ike many state geologic surveys, the Oregon Department of Geology and Mineral Industries (DOGAMI) is continually assessing new tech- bulk of geologic information for their respective states. In 2004, DOGAMI embarked on a six-year effort to cre- ate a database that would bring together the best of the paper maps on Oregon's geology and serve as a statewide geologic data compilation. Many individuals worked on the project to scan maps as well as digitize and attribute features. The result was the Oregon Geologic Data Compilation Release 5 (OGDC-5), published in 2009. This compi- lation enabled the creation of a statewide thematic geologic map and included digital data comprising four Shapefiles (geologic map-unit polygons, faults, folds and source-map polygons) and a complex Microsoft Access database of detailed geologic and source/ref- erence information. 18 GEO W ORLD / FEB RUAR Y 2O12 Geologic Mapping

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