Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Publication Date: 2020
Title: Sediment Thickness of Alberta, Version 2 (gridded data, ASCII format)
Edition: v.2
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2020-0023
Publication Information:
Publication Place: Edmonton, Alberta
Publisher: Alberta Geological Survey
Other Citation Details: Scale 1:1 million
Online Linkage: http://ags.aer.ca/document/DIG/DIG_2020_0023.zip
Description:
Abstract:

This grid is a digital rendering of the thickness and distribution of sediment overlying bedrock in Alberta produced by subtracting a newly revised bedrock topography gridded surface of Alberta that was generated using machine learning techniques from a land surface digital elevation model. This gridded data updates the sediment thickness portrayed in AGS Map 603, Sediment Thickness of Alberta. The grid was modelled using a 500 m grid cell spacing, and should not be used for local-scale studies requiring a higher spatial resolution.

The thickness and distribution of sediments overlying the bedrock surface in Alberta is highly varied, with modelled values ranging from less that 1 m to as much as 360 m. These sediments include Neogene fluvial deposits, glacigenic materials deposited during Quaternary glaciations, as well as postglacial sediments.

Purpose: To provide an updated sediment thickness grid of Alberta.
Supplemental Information: Language: In English;
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 2015
Ending Date: 2019
Currentness Reference: ground condition
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120
East Bounding Coordinate: -110
North Bounding Coordinate: 60
South Bounding Coordinate: 49
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: 3d models
Theme Keyword: bedrock topography
Theme Keyword: buried valleys
Theme Keyword: geology
Theme Keyword: gis data
Theme Keyword: preglacial drainage
Theme Keyword: sediment thickness
Place:
Place Keyword Thesaurus: none
Place Keyword: 72e
Place Keyword: 72l
Place Keyword: 72m
Place Keyword: 73d
Place Keyword: 73e
Place Keyword: 73l
Place Keyword: 73m
Place Keyword: 74d
Place Keyword: 74e
Place Keyword: 74l
Place Keyword: 74m
Place Keyword: 82g
Place Keyword: 82h
Place Keyword: 82i
Place Keyword: 82j
Place Keyword: 82n
Place Keyword: 82o
Place Keyword: 82p
Place Keyword: 83a
Place Keyword: 83b
Place Keyword: 83c
Place Keyword: 83d
Place Keyword: 83e
Place Keyword: 83f
Place Keyword: 83g
Place Keyword: 83h
Place Keyword: 83i
Place Keyword: 83j
Place Keyword: 83k
Place Keyword: 83l
Place Keyword: 83m
Place Keyword: 83n
Place Keyword: 83o
Place Keyword: 83p
Place Keyword: 84a
Place Keyword: 84b
Place Keyword: 84c
Place Keyword: 84d
Place Keyword: 84e
Place Keyword: 84f
Place Keyword: 84g
Place Keyword: 84h
Place Keyword: 84i
Place Keyword: 84j
Place Keyword: 84k
Place Keyword: 84l
Place Keyword: 84m
Place Keyword: 84n
Place Keyword: 84o
Place Keyword: 84p
Place Keyword: alberta
Place Keyword: canada
Access Constraints: Public
Use Constraints:
Acknowledgement of the Alberta Energy Regulator/Alberta Geological Survey as the originator/source of this information is required as described in the Open Government License - Alberta.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Publication Date: 2020
Title: Bedrock Topography of Alberta, Version 2 (gridded data, ASCII format)
Edition: v.2
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2020-0022
Publication Information:
Publication Place: Edmonton, Alberta
Publisher: Alberta Geological Survey
Other Citation Details: Scale 1:1 million
Online Linkage: https://www.ags.aer.ca
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Atkinson, L.A.
Originator: Pawley, S.M.
Originator: Andriashek, L.D.
Originator: Hartman, G.M.D.
Originator: Utting, D.J.
Originator: Atkinson, N.
Publication Date: 2020
Title: Bedrock Topography of Alberta, Version 2
Edition: v.2
Geospatial Data Presentation Form: map
Series Information:
Series Name: Map
Issue Identification: MAP 610
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: ISBN:978-1-4601-4922-5
Online Linkage: https://www.ags.aer.ca
Cross Reference:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Originator: Atkinson, L.A.
Originator: Pawley, S.M.
Originator: Andriashek, L.D.
Originator: Hartman, G.M.D.
Originator: Utting, D.J.
Originator: Atkinson, N.
Publication Date: 2020
Title: Sediment Thickness of Alberta, Version 2
Edition: v.2
Geospatial Data Presentation Form: map
Series Information:
Series Name: Map
Issue Identification: MAP 611
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: ISBN:978-1-4601-4923-2
Online Linkage: https://www.ags.aer.ca
Data Quality Information:
Attribute Accuracy:
Attribute Accuracy Report:
The sediment thickness was calculated by subtracting the modelled bedrock topography gridded surface from a land surface digital elevation model resampled to a 500 m by 500 m grid. Any errors in the modelled bedrock topography are also present in the sediment thickness grid. The 500 m digital elevation model will vary from higher resolution models; however, for the purposes of a provincial-scale grid the detail provided in a high-resolution digital elevation model is not necessary.
Logical Consistency Report:
The gridded data indicate the thickness of sediments in metres that lie above the bedrock topography. The grid was exported as a continuous surface in ArcGIS ASCII grid format. The grid cell spacing is 500 m by 500 m, and any grid cells with a null value have been assigned the value -9999.
Completeness Report:
Machine learning techniques were used to model the bedrock topography surface. Input data for the bedrock topography used multi-source input data of variable quality. Bedrock topography picks that were identified as outliers by an AGS geologist were excluded from the modelling process. The bedrock topography grid and a resampled land surface digital elevation model were used to calculate the sediment thickness grid.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
Bedrock topography picks used to generate the gridded surface were from a variety of sources that have inherent location errors. The sediment thickness was calculated from the bedrock topography grid and a land surface digital elevation model. At the 500 m grid cell size the bedrock topography and ground surface were rendered at, any horizontal positional error will have little impact on the accuracy of the grid considering this is a provincial-scale grid and not intended for local scale studies.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report:
The vertical positional error of the bedrock topography grid, which was used to calculate the sediment thickness grid is a function of the quality of the pick set, including data density, the surface complexity (i.e. topographic variability), and the removal of points from the pick set that are identified as outliers. The occurrence of vertical errors has been mitigated by ensuring the bedrock topography picks were estimated from the same land surface datum, assessing the quality of the data, and then geostatistically evaluating the data points to identify and remove outliers.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: AltaLIS
Publication Date: 20170316
Title: AltaLIS LiDAR15 Digital Elevation Model (gridded data, ASCII format)
Geospatial Data Presentation Form: raster digital data
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: AltaLIS
Source Scale Denominator: 0
Type of Source Media: online
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 2015
Source Currentness Reference: ground reference
Source Citation Abbreviation: Digital Elevation Model (DEM)
Source Contribution: This grid defines the land surface elevation of Alberta.
Source Information:
Source Citation:
Citation Information:
Originator: Alberta Energy Regulator
Originator: Alberta Geological Survey
Publication Date: 2020
Title: Bedrock Topography of Alberta, Version 2 (gridded data, ASCII format)
Edition: v.2
Geospatial Data Presentation Form: raster digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2020-0022
Publication Information:
Publication Place: Edmonton, Alberta
Publisher: Alberta Geological Survey
Other Citation Details: Scale 1:1 million
Source Scale Denominator: 0
Type of Source Media: online
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 2020
Source Currentness Reference: current
Source Citation Abbreviation: Bedrock topography
Source Contribution: The grid is the bedrock topography of Alberta.
Process Step:
Process Description:
The sediment thickness was derived by subtracting the modelled bedrock topography gridded surface from a land surface digital elevation model (DEM). The land surface DEM was generated at a 500 m grid cell size using the aggregate tool in ArcGIS to resample the DEM at a coarser resolution that would be appropriate for a provincial-scale model. The bedrock topography gridded surface was rendered at the same 500 m grid cell size resolution, which is intended for provincial-scale investigations and not applicable for site specific studies. The sediment thickness grid was produced in Transverse Mercator projection using the North American Datum 1983 (NAD83).
Process Date: 2020
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Distribution Liability:
The Alberta Energy Regulator/Alberta Geological Survey (AER/AGS) licenses this information under the Open Government License - Alberta. Any references to proprietary software in our documentation, and/or any use of proprietary data formats in our releases, do not constitute endorsement by the AER/AGS of any manufacturer's product.
Metadata Reference Information:
Metadata Date: 20200930
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: AGS Information Manager
Contact Position: AGS Information Manager
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy Regulator
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue NW
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 638-4491
Contact Facsimile Telephone: (780) 422-1459
Contact Electronic Mail Address: AGS-Info@aer.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Access Constraints: none
Metadata Use Constraints: none