|Abstract||The Tri-Territorial Surficial Database Project is part of the Geological Survey of Canada's GEM Knowledge Management Program. The main objective is to provide an accessible regional-scale surficial
knowledge base to support exploration and economic development. This is accomplished through a digital compilation and queriable map database of new and existing surficial geology maps for onshore and offshore areas of Yukon, Northwest Territories,
and Nunavut. The Project coordinates with other databases and field mapping activities within the Geo-mapping for Energy and Minerals Program (GEM). The Tri-Territorial database is also key in documenting and illustrating the ongoing mapping coverage
and advances in the North, as well as serve to highlight knowledge gaps to better focus future surficial mapping projects|
The current compilation includes 153 maps from the Northwest Territories (including 84 in digital format), 316 maps from
Nunavut (including 177 in digital format), and 160 maps in digital format from the Yukon. These various map types include: Surficial Materials, Surficial Geology, Quaternary Geology, Terrain Classification, Remote Predictive mapping (RPM),
Topographic maps with surficial data, unpublished manuscript maps, Physical Environment, and selected EGS maps with Quaternary information. These maps represent about 52% by area of the Northwest Territories, so that approximately 48% is covered only
by reconnaissance style maps at 250K and 1M scale with no field work. To date, 78 of the NWT map legends have been captured in digital format in an Access database. A legend parsing tool will assist in creating the science language, and help improve
search times and ability within the legend database. A new GSC common surficial legend is also being developed to ensure the implementation of standard codes and symbols, and thus facilitate new Quaternary geology mapping and correlation of map units
across all Territories. Conversion of older map units to the new legend will also provide significant queriable advantages to the database.
Geographic Information Systems (GIS) and Inforamtion Management (IM) processes are integral parts of map
database development and implementation. To facilitate data management, an index map was created, delineating the borders of surficial maps, generally by NTS sheet. An accompanying index database helps track the status of digital progression. Both
are linked to provide the ability to visualize the advancement of both surficial mapping and digital conversion coverage.
The following summarizes the various stages in preparing digital maps: base maps and imagery require assembly; imagery gets
georeferenced to base map; QC done to ensure georeferencing accuracy; abnormalities and interpretation issues are resolved either by data manager, project manager or research scientist; final map geodatabase is quality checked for accurate contacts,
attribution, direction and sense of features; final digital product is standardized into coverage format; coverage format separated into: lin, pnt, geo, and gep; previously digitized maps in various formats (Shapefiles, CAD, Geodatabases,
Microstation) are converted to coverage format. Standardized products are added to data repository and the index database is updated. A series of GIS tools were also created to facilitate the standardization of received and historic digital map
products. These tools allow users to standardize into coverage formats. Through the use of Python scripted tools, users can still convert these coverages and minimize having to use ArcInfo Workstation.