Readme File for Open File 2016-04 Geodatabase
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Publication Information
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Ice-flow indicator compilation, British Columbia and Yukon
British Columbia Ministry of Energy and Mines, British Columbia Geological Survey Open File 2016-04
Geological Survey of Canada Open File 8083
H. Arnold, T. Ferbey and A.S. Hickin


A better understanding of the Cordilleran ice sheet flow history is important for designing, implementing, and interpreting geochemical and mineralogical data from drift prospecting surveys. Building on ice-flow indicator compilations for British Columbia by Ferbey et a l. (2013) and Yukon Territory (Lipovsky and Bond, 2014), this map and database illustrate major ice-flow directions for the Canadian sector of Cordilleran ice sheet during the Late Pleistocene.

The data were derived from published and unpublished surficial geology, terrain, and glacial feature maps. Because field data are sparse in the area ~ 300 km south of the British Columbia -Yukon border, new data were generated using digital stereo airphotos, digital derived-stereo orthophoto mosaics, and digital derived-stereo Satellite Pour l'Observation de la Terre (SPOT) imagery. The raw data are integrated into a single database; no attempt was made to reconcile cases where data from different sources conflict. 

The integrated database may be downloaded from http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/OpenFiles/2016/Pages/2016-4.aspx
 
This publication is available for free download through the British Columbia Geological Survey (http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/OpenFiles/2016/) and GEOSCAN (http://geoscan.nrcan.gc.ca/).

doi:10.4095/298865

Recommended citation
Arnold, H., Ferbey, T., and Hickin, A.S., 2016. Ice-flow indicator compilation, British Columbia and Yukon; British Columbia Ministry of Energy and Mines, British Columbia Geological Survey, Open File 2016-04; Geological Survey of Canada, Open File 8083, 1 .zip file. doi:10.4095/298865


Feature Class Information
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Column description of feature class data tables:

Feature	Type			- Type of ice-flow indicator. For consistency and ease of use all
				  features included in this compilation were classified into a 
				  common legend using definitions and symbols outlined by Deblonde 
	     	     		  et al. (2012).
Directionality of Feature	- Directionality of feature
250K NTS sheet			- NTS 1:250 000 map sheet feature centroid is in
50K NTS sheet			- NTS 1:50 000 map sheet feature centroid is in
Datum				- Datum used for compilation and to generate longitude and latitude
				  coordinates
Projection			- Projection used for compilation and to generate longitude and 
				  latitude coordinates
Longitude			- Longitude in decimal degrees
Latitude			- Latitude in decimal degrees
Azimuth				- Orientation of feature
Relative timing of features	- If known, the sequence of formation of overlapping features 
				  oldest (1) to newest (3)
Symbol				- Code used to symbolized points using GSC_SymbolStandard.style and 
				  GSC_SymbolStandard1.ttf
Field date			- If known, when field work was completed
Comments			- If available, additional information about feature
source Feature			- Feature type assigned by source author
source Datum			- Datum of data source
source Projection		- Projection of data source
source Author			- Author(s) of publication
source Year			- Year of publication
source Title			- Title of source publication
source Organization		- Publishing organization of data source
source Series			- Publication series of data source
source Publication Number	- Publication number of data source
source Scale			- Map scale of source data
source Type			- Digital (shapefile, e00, Excel spreadsheet, georeferenced TIFF),
				  hardcopy (PDF of original hardcopy map)
source Reference		- Citation of data source


Symbol set information
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The user is directed to Deblonde et al. (2012) for a more detailed discussion on the symbol set used here.  See Appendix D for a presentation of point, line, and polygon styles and symbol codes.