Identification Information:
Citation:
Citation Information:
Originator: Alberta Energy and Utilities Board
Originator: Alberta Geological Survey
Originator: Pawlowicz, J.G.
Originator: Fenton, M.M.
Originator: Hickin, A.S.
Originator: Nicoll, T.J.
Originator: Paulen, R.C.
Originator: Plouffe, A.
Originator: Smith, I.R.
Publication Date: 200512
Title: Bedrock Topography of Zama Lake Area, Alberta (NTS 84L) (GIS data, line features)
Geospatial Data Presentation Form: vector digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2005-529
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Other Citation Details: Scale 1:250000.
Description:
Abstract:
This GIS dataset depicts the bedrock topography of NTS map area 84L ( line features). The data are created in ArcInfo format and output for public distribution in Arc export (E00) and shapefile formats.
Purpose: For depicting bedrock topography in the Zama Lake area (NTS84L) in GIS format.
Supplemental Information:
These data comprise the line features of Map 328, The Bedrock Topography of Zama Lake Area, Alberta, (NTS 84L). This metadata record was generated based on the ArcInfo coverage version of the data. In English.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 2003
Ending Date: 2005
Currentness Reference: process date
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120.002792
East Bounding Coordinate: -117.994804
North Bounding Coordinate: 59.006287
South Bounding Coordinate: 57.993675
Keywords:
Theme:
Theme Keyword Thesaurus:
Theme Keyword: bedrock topography
Theme Keyword: buried valley
Theme Keyword: drift thickness
Theme Keyword: gis data
Theme Keyword: glacial drift
Theme Keyword: overburden
Theme Keyword: shallow gas
Theme Keyword: thalweg
Place:
Place Keyword Thesaurus:
Place Keyword: 84l
Place Keyword: alberta
Place Keyword: canada
Place Keyword: rainbow lake
Place Keyword: zama lake
Access Constraints: Public
Use Constraints: Credit to originator/source required. Commercial reproduction not allowed.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Communications Advisor
Contact Position: Communications Advisor
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy and Utilities Board
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 422-3767
Contact Facsimile Telephone: (780) 422-1918
Contact Electronic Mail Address: eub.ags-infosales@gov.ab.ca
Hours of Service: 8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.
Data Set Credit: M.C. Price; Base data provided by Spatial Data Warehouse Ltd.
Data Quality Information:
Logical Consistency Report:
The stratigraphic picks used to produce the bedrock surface and drift thickness contours were verified for each data point used. Contouring of the data was first done by a contouring program and then the contour lines were hand-edited on the computer to produce the final interpretation. Data have been checked to ensure all features are attributed, that there are no dublicates and no crossing of contours.
Completeness Report:
To generate the contour lines of the bedrock surface and drift thickness, data sources included oil and gas wells with 1599 petrophysical logs and 130 drill cuttings, 63 water well lithologs and 85 bedrock outcrops. Of the 1749 data points used, 87 were bedrock picks from outcrop, 737 were stratigraphic picks of bedrock from wells, 886 were stratigraphic picks below the bedrock surface and 39 were stratigraphic picks above the bedrock surface.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
Accuracy of well data used for producing the bedrock topography contour and drift thickness lines are estimated to be +/- 50 metres. The bedrock topography contour lines honour each data point and were edited to reflect a valley incision geological model. The horizontal accuracy of contour lines varies with well data density. Position accuracy of contour lines varies from +/- 5 km where well data are sparse to +/- 500 m where well data are closely spaced. Drift thickness lines are dependant on bedrock surface elevations and ground surface elevations from DEM, and reflect the same level of accuracy as bedrock topography lines
Lineage:
Process Step:
Process Description:

The drift thickness and structure contour of the bedrock surface maps were determined from bedrock stratigraphic picks made from three main sources: oil and gas wells, water wells and surficial geology maps. In oil and gas wells, the bedrock picks were made using geophysical logs with additional information from drill cuttings. From water wells, lithologic descriptions were used to determine the depth to bedrock pick. Surficial geology maps were used to obtain bedrock outcrop locations and areas of thin drift (< 2 metres) overlying bedrock. Tabulated data of bedrock picks and GIS polygons of thin drift were imported into ArcGIS v9.0 for computer contouring on a desktop computer. Ground surface elevations were imported as DEM data into the project software. Bedrock depth picks of each data point were then converted to bedrock elevations above sea level by subtracting depths from DEM data values at that data location. The data were then gridded using the Natural Neighbors method in the 3D Analyst tool in ArcGIS. The resultant grid of the bedrock surface was checked for conflicts and edited to not exceed the ground surface. Next the corrected grid was contoured using XTools in ArcGIS. The contoured lines were then manually edited using the ArcGIS software to reflect a valley incision geological model. The final bedrock contours were regridded using a 60 m cell size to produce infill colour rendition. The drift thickness map was finally created by subtracting the bedrock surface grid from a grid of the ground surface topography. The resultant grid was then smoothed using Neighborhood Statistics under the Spatial Analyst tool in ArcGIS using the following parameters: rectangular mean statistics type, neighborhood settings of cell height and width of 5, and output cell size of 300. The resultant grid was then contoured to create a drift thickness map.

All map interpretation and preparation was done using ArcGIS v9.0 on a desktop computer.

Process Date: 2005
Spatial Data Organization Information:
Direct Spatial Reference Method: Vector
Point and Vector Object Information:
SDTS Terms Description:
SDTS Point and Vector Object Type: Complete chain
Point and Vector Object Count: 660
SDTS Terms Description:
SDTS Point and Vector Object Type: Point
Point and Vector Object Count: 4
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Geographic Coordinate Units: Decimal degrees
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-Major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
Entity and Attribute Information:
Detailed Description:
Entity Type:
Entity Type Label: btopo_84l_ll.aat
Entity Type Definition: Line features
Entity Type Definition Source: Alberta Geological Survey
Attribute:
Attribute Label: ELEVATION
Attribute Definition: Interpolated bedrock surface elevation in metres above sea level
Attribute Definition Source: Alberta Geological Survey
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Information Sales Coordinator
Contact Position: Information Sales Coordinator
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy and Utilities Board
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 422-3767
Contact Facsimile Telephone: (780) 422-1918
Contact Electronic Mail Address: eub.ags-infosales@gov.ab.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 and Utilities Board/Alberta Geological Survey (EUB/AGS) and its employees and contractors make no warranty, guarantee or representation, express or implied, or assume any legal liability regarding the correctness, accuracy, completeness or reliability of this publication. The data are supplied on the understanding that they are for the sole use of the user and will not be redistributed in any form, in whole or in part, to third parties. 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 EUB/AGS of any manufacturer's product.
Metadata Reference Information:
Metadata Date: 20051109
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Communications Advisor
Contact Position: Communications Advisor
Contact Address:
Address Type: mailing and physical
Address: Alberta Energy and Utilities Board
Address: 4th Floor, Twin Atria Building
Address: 4999-98 Avenue
City: Edmonton
State or Province: Alberta
Postal Code: T6B 2X3
Country: Canada
Contact Voice Telephone: (780) 422-3767
Contact Facsimile Telephone: (780) 422-1918
Contact Electronic Mail Address: eub.ags-infosales@gov.ab.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