This pilot project involved the development of a process to execute and evaluate a test migration of a legacy geologic map geodatabase, from the format of the Washington State Department of Natural Resources, Division of Geology and Earth Resources (DGER) "in-house" schema, to the "NCGMP09" draft standard format for digital publication of geologic maps devised by U.S. Geological Survey's National Cooperative Geologic Mapping Program (NCGMP). The NCGMP09 geodatabase model uses an established FGDC symbol standard “FGDC/USGS Digital Cartographic Standard for Geologic Map Symbolization” (FGDC Document Number FGDCSTD- 013-2006) and expects that the users are familiar with data management and cartography within a Geographic Information System (GIS).
This project used the Geologic Map of the Carnation 7.5-minute quadrangle, King County, Washington geologic map database as the transition subject for this NCGMP09 migration project. A primary tool used to compile the NCGMP09 geodatabase was Esri's ArcGIS ArcCatalog as well as the associated Python 2.7.2. (While both federal (USGS) and state (e.g. DGER) agencies promote the use of Esri software for geodatabase management, other authors have successfully created NCGMP09 geodatabases using open source programs (e.g. PostGIS).
The outcome of this investigation was a number of deliverables including a procedural cookbook explaining how DGER used scripts to complete their migration, an additional notes and observations document that is intended to serve as feedback for the standard developers, and assist other interested users and managers of digital geologic data, helping to smooth their potential transition to the FGDC-endorsed geologic map standard. These materials, along with the actual scripts and data used for and created by this project are available for download in the Project Documents and Deliverables of this site.
It is hoped that adoption of a national standard to portray and disseminate digital geologic map information will ensure consistent map quality that will facilitate use by DGER clients as well as enhance data sharing capabilities with other state and national agencies.