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TitlePredictive surficial geology, Denmark Bay-Qikiqtagafaaluk area, Victoria Island Nunavut, NTS 67-C and F
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorSharpe, D RORCID logo; Lesemann, J -E; Parkinson, W; Armstrong, L; Dods, E
SourceGeological Survey of Canada, Canadian Geoscience Map 174, 2023, 2 sheets, Open Access logo Open Access
LinksSurficial geology map collection
LinksCollection de données de géologie de surface
PublisherNatural Resources Canada
Editionsurficial data model v.2.3.14 conversion
Maps2 maps
Map Info.surficial geology, remote predictive materials, 1:250,000
ProjectionLambert Conformal Conic Projection, UTM zone 13 (NAD83)
Mediadigital; on-line
RelatedNRCan photo(s) in this publication
RelatedThis publication is related to the following publications
File formatreadme
File formatpdf; rtf; xml; xls; shp
NTS67C; 67F
AreaVictoria Island; Admiralty Island; Denmark Bay; Qikiqtagafaaluk
Lat/Long WENS-104.0000 -100.0000 70.0000 69.0000
Subjectssurficial geology/geomorphology; remote sensing; glacial deposits; landforms; terrain types; glacial landforms; vegetation; soil moisture; glacial features; eolian deposits; marine deposits; glaciomarine deposits; Cenozoic; Quaternary
Illustrationsphotographs; location maps
ProgramGEM2: Geo-mapping for Energy and Minerals Rae Province Project Management
Released2023 03 29
AbstractThis 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.

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