This GIS dataset depicts the surficial geology of the Ray Lake Area (NTS 84D/NW) (GIS data, line features). The data were created in geodatabase format and output for public distribution in shapefile format.
These data comprise the line features of Alberta Geological Survey Map 557, Surficial Geology of the Ray Lake Area (NTS 84D/NW).
The digital vector data are topologically correct lines as built and enforced using ArcGIS software. Due to the availability of high-quality, LiDAR, bare-earth digital elevation model data (unpublished) for NTS 84D/NW, it was possible to delineate polygons and lines that would otherwise be unobservable.
Adjacent map areas have not been mapped using LiDAR; therefore, new feature boundaries have been identified in NTS 84D/NW that do not have a corresponding boundary in the adjacent study areas. Consequently, NTS 84D/NW is not fully edge-matched with adjacent areas. Line features intersect only where intended.
Our processes included
1. making a mosaic and relief shading the LiDAR for complete coverage of NTS 84D/NW;
2. digitizing polygons and line features across the LiDAR image of NTS 84D/NW using ArcGIS;
3. labelling spatial features;
4. checking the quality of the digital file; and
5. proofreading the text.