| Title | Predictive surficial geology, Denmark Bay-Qikiqtagafaaluk area, Victoria Island Nunavut, NTS 67-C and F |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Sharpe, D R ;
Lesemann, J -E; Parkinson, W; Armstrong, L; Dods, E |
| Source | Geological Survey of Canada, Canadian Geoscience Map 174, 2023, 2 sheets, https://doi.org/10.4095/295703  Open Access |
| Links | Surficial geology map collection
|
| Links | Collection de données de géologie de surface
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| Image |  |
| Year | 2023 |
| Publisher | Natural Resources Canada |
| Edition | surficial data model v.2.3.14 conversion |
| Document | serial |
| Lang. | English |
| Maps | 2 maps |
| Map Info. | surficial geology, remote predictive materials, 1:250,000 |
| Projection | Lambert Conformal Conic Projection, UTM zone 13 (NAD83) |
| Media | digital; on-line |
| Related | NRCan
photo(s) in this publication |
| Related | This publication is related to the following publications |
| File format | readme
|
| File format | pdf; rtf; xml; xls; shp |
| Province | Nunavut |
| NTS | 67C; 67F |
| Area | Victoria Island; Admiralty Island; Denmark Bay; Qikiqtagafaaluk |
| Lat/Long WENS | -104.0000 -100.0000 70.0000 69.0000 |
| Subjects | surficial geology/geomorphology; remote sensing; glacial deposits; landforms; terrain types; glacial landforms; vegetation; soil moisture; glacial features; eolian deposits; marine deposits;
glaciomarine deposits; Cenozoic; Quaternary |
| Illustrations | photographs; location maps |
| Program | GEM2: Geo-mapping for Energy and Minerals Rae Province Project Management |
| Released | 2023 03 29 |
| Abstract | This 1:250 000 predictive surficial geology map of Denmark Bay-Qikiqtagafaaluk area combines remote predictive mapping (RPM) and visually interpreted imagery from LANDSAT and SPOT data.
Machine-automated classification of training data, conversion to surficial geology and terrain reclassification were integrated with landform and regional ground-truth data. The map captures a sediment mosaic because spectral data realistically
record moisture content on terrain surfaces in this permafrost setting. Tonal character of moisture content is controlled by sediment texture, topography, vegetation, and material thickness. Visual analysis of terrain form, with expert knowledge,
reveals a series of crosscut streamlined flow fields recording complex glacial history, including marine inundation limits. Scoured bedrock in flow fields indicates erosional terrains, with little or no sediment cover. RPM methods are efficient and
accurate in mapping surface spectral details, allowing more time to develop geological models of glaciated terrain. This publication includes the predictive surficial geology data in two formats: Sheet 1, raster (~75%)/vector (~25%), and Sheet 2,
vector. |
| Summary | (Plain Language Summary, not published)
This 1: 250K surficial geology map of Admiralty Island, southeastern Victoria Island, represents a new mapping method that integrates automated mapping,
based on satellite imagery, and, traditional interpretive mapping by a geologist from imagery (air and satellite photographs). Satellite images record spectral tone or moisture variation used to classify terrain types. Automated classification is
aided by training areas that incorporate terrain analysis used by photograph interpreters (geologist). These include mapping materials based on visual characteristics (mainly moisture content), such as; tone, texture, size, shape, pattern, and other
terrain features. The tonal character of moisture content, controlled by sediment texture, topographic position, vegetation, and material thickness, is most efficiently mapped by machine methods. Visual identification of landforms along with expert
knowledge reveal a widespread series of low-relief, cross-cutting flow fields that record the complex glacial history of eastern Victoria Island, including ancient marine limit water plains. |
| GEOSCAN ID | 295703 |
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