Identification Information:
Citation:
Citation Information:
Originator: Kent, D.M.
Publication Date: 2008
Title: Ordovician (OS2) Paleogeography (GIS data, polygon features)
Edition: v. 2
Geospatial Data Presentation Form: vector digital data
Series Information:
Series Name: Digital Data
Issue Identification: DIG 2008-0017
Publication Information:
Publication Place: Edmonton, Alberta, Canada
Publisher: Alberta Geological Survey
Online Linkage: http://www.ags.gov.ab.ca/publications/DIG/ZIP/DIG_2008_0017.zip
Description:
Abstract:
The Geological Atlas of the Western Canada Sedimentary Basin was designed primarily as a reference volume documenting the subsurface geology of the Western Canada Sedimentary Basin. This GIS dataset is one of a collection of shapefiles representing part of Chapter 7 of the Atlas, Paleographic Evolution of the Cratonic Platform - Cambrian to Triassic, Figure 4, Ordovician (OS2) Paleogeography. Shapefiles were produced from archived digital files created by the Alberta Geological Survey in the mid-1990s, and edited in 2005-06 to correct, attribute and consolidate the data into single files by feature type and by figure.
Purpose: For incorporating Atlas data into a Geographic Information System at a regional scale.
Supplemental Information: In English.
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 1994
Currentness Reference: source publication date
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -126.003345
East Bounding Coordinate: -95.994661
North Bounding Coordinate: 62.010282
South Bounding Coordinate: 48.989839
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: geology
Theme Keyword: gis data
Theme Keyword: western canada sedimentary basin
Place:
Place Keyword Thesaurus: None
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: 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
Place Keyword: western 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: Publications and Marketing Advisor
Contact Position: Publications and Marketing Advisor
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) 422-1927
Contact Facsimile Telephone: (780) 422-1918
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.
Data Set Credit: A. Lytviak, E.J. Waters, N. Blundon, K. Miller, N. Crann
Native Data Set Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535
Data Quality Information:
Logical Consistency Report:
This shapefile may contain overlaps and gaps between what are intended to be logically contiguous polygons. Where gaps were larger than approximately 100 m, polygons were edited to snap shared boundaries together. However, not all gaps and overlaps were corrected. Logical inconsistencies are also known to exist among datasets from different chapters of the Atlas itself. For example, stratigraphic surfaces may intersect or overlap incorrectly; stratigraphically lower horizons crop out above certain units, and vice versa. This is a function of different authors of the Atlas modelling their data in isolation from others, and no attempt was made by the Alberta Geological Survey (AGS) to correct these types of deficiencies.
Completeness Report:
The Geological Atlas is a study of the Western Canada Sedimentary Basin based upon a well density of one well per Township (36 square miles or 93 square km). Users are encouraged to consult relevant parts of the Atlas to obtain specific methodology information for datasets of interest.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
This dataset is part of a regional study covering nearly one and a half million square kilometres. Accordingly, the data should only be used to provide geological context information at a regional scale. Figures from different chapters of the Atlas were prepared by different authors, and no effort has been made by AGS to distinguish which shapefiles may be of greater or less relative positional accuracy. We estimate that the relative positional accuracy averages +/- 10 km for the files. This estimate does not take into account the accuracy of the original works, which have not been quantified.
Lineage:
Process Step:
Process Description:
Data were archived in digital form by AGS, in geographic coordinate-based ascii files. The files were reformated into ArcGenerate ascii files, using the ID field for the elevation attribute, then converted to shapefiles using FME 2002. An elevation field was created and the ID field was copied over then dropped. Shapefiles were shifted from NAD27 to NAD83 using FME 2002, which references the NTv2 grid file. All processing was done in batch mode.
Process Date: 2003
Process Step:
Process Description:

This file was generated as part of a batch of 349 shapefiles that were deemed to be of interest for conversion to GIS format. 188 figures/maps are represented by these shapefiles. Source data for the batch conversion project were in one of three types: 1) georeferenced digital ASCII files previously converted into shapefile format; 2) non-georeferenced, graphics format (.wmf); and 3) paper maps. Type 1 shapefile data were checked for completeness of line and polygon features, edited, then attributed with the figure title and individual feature descriptions given in the map legends. Type 2 data followed the same workflow as Type 1, except that the figures were first converted to DXF format then transformed using ArcInfo into real-world coordinates. The relatively few maps of Type 3 were scanned into image format, digitized in heads-up mode, then handled the same as Type 2 data. A quality-checking system was used to track the status of each figure and file as the work proceeded. Check plots of each map at the respective source map scale and projection and were compared to originals by the supervising geologist (M. Grobe). Errors were flagged and subsequently corrected. Once the data had been thoroughly checked, the shapefiles were projected into geographic coordinates, NAD 83 datum.

ArcMap layer files were created to render the shapefile data as they appear in the Geological Atlas. This step served to further the quality control for the data. Minor edits were required to about 10 shapefiles in order to symbolize them as they appear in the Atlas.

Process Date: 2006
Spatial Data Organization Information:
Direct Spatial Reference Method: Vector
Point and Vector Object Information:
SDTS Terms Description:
SDTS Point and Vector Object Type: G-Polygon
Point and Vector Object Count: 7
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Latitude Resolution: 0.08
Longitude Resolution: 0.08
Geographic Coordinate Units: decimal degrees
Geodetic Model:
Horizontal Datum Name: North_American_Datum_1983
Ellipsoid Name: Geodetic Reference System of 1980
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
Entity and Attribute Information:
Detailed Description:
Entity Type:
Entity Type Label: fg0704_py_ll
Entity Type Definition: Shapefile attributes
Entity Type Definition Source: Alberta Geological Survey
Attribute:
Attribute Label: ID
Attribute Definition: AGS unique ID
Attribute Definition Source: Alberta Geological Survey
Attribute Domain Values:
Unrepresentable Domain: Free text
Attribute:
Attribute Label: MAP_NAME
Attribute Definition: Map or figure title
Attribute Definition Source: Alberta Geological Survey
Attribute Domain Values:
Unrepresentable Domain: Free text
Attribute:
Attribute Label: DESCR1
Attribute Definition: Feature description
Attribute Definition Source: Alberta Geological Survey
Attribute Domain Values:
Unrepresentable Domain: Free text
Overview Description:
Entity and Attribute Overview: Attributes encapsulate the title and legend details of the figure.
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Publications and Marketing Advisor
Contact Position: Publications and Marketing Advisor
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) 422-1927
Contact Facsimile Telephone: (780) 422-1918
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: 20131107
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Geological Survey
Contact Person: Publications and Marketing Advisor
Contact Position: Publications and Marketing Advisor
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) 422-1927
Contact Facsimile Telephone: (780) 422-1918
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