  AGS_Information
  Identification_Information
    Citation
      Citation_Information
        Originator: Alberta Energy Regulator
        Originator: Alberta Geological Survey
        Originator: Nakevska, N.
        Publication_Date: 2026
        Title: Distribution of Total Dissolved Solids in the Granite Wash in Alberta (gridded data, ASCII format)
        Geospatial_Data_Presentation_Form: raster digital data
        Series_Information
          Series_Name: Digital Data
          Issue_Identification: DIG 2025-0018
        Publication_Information
          Publication_Place: Edmonton, Alberta, Canada
          Publisher: Alberta Geological Survey
        Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0018
    Description
      Abstract: This gridded dataset represents the distribution of total dissolved solids (TDS) in the Granite Wash in Alberta. The grid is a result of a geostatistical model which was constructed using formation water chemistry data from drillstem tests. The TDS distribution was mapped at a regional scale using many years of data, thus providing a good indication of regional water chemistry within the Granite Wash rather than site-specific values.
      Purpose: To provide a gridded dataset representing the distribution of total dissolved solids in the Granite Wash in Alberta.
      Supplemental_Information: Language: In English;
    Time_Period_of_Content
      Time Period Information
        Single Date/Time
          Calendar_Date: 2010
    Currentness_Reference: ground condition
  Status
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial Domain
    Bounding Coordinates
      West_Bounding_Coordinate: -118.90848
      East_Bounding_Coordinate: -114.32263
      North_Bounding_Coordinate: 57.53896
      South_Bounding_Coordinate: 55.17721
  Keywords
    Theme
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: formation waters
      Theme_Keyword: granite wash
      Theme_Keyword: hydrogeology
      Theme_Keyword: total dissolved solids
      Theme_Keyword: water chemistry
    Place
      Place_Keyword_Thesaurus: ISO 19115 Topic Category
      Place_Keyword: alberta
      Place_Keyword: northwestern alberta
      Place_Keyword: west-central alberta
      Place_Keyword: western canada sedimentary basin
  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: 2nd 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
      Originator: Nakevska, N.
      Publication_Date: 2025
      Title: Distribution of Total Dissolved Solids in the Granite Wash in Alberta (tabular data, tab-delimited format)
      Geospatial_Data_Presentation_Form: tabular digital data
      Series_Information
        Series_Name: Digital Data
        Issue_Identification: DIG 2025-0017
      Publication_Information
        Publication_Place: Edmonton, Alberta, Canada
        Publisher: Alberta Geological Survey
      Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0017
Data_Quality_Information
  Attribute_Accuracy
    Attribute_Accuracy_Report: The following statistics describe the accuracy of the geostatistical layer used to create the final grid.
Mean error: -1383.30 mg/L
Root mean square error: 15 763 mg/L
Average standard error: 17 075 mg/L
Root mean square standardized: 1.0
  Logical_Consistency_Report: Grid cell values represent total dissolved solids concentration in mg/L. Grid cell spacing is 500 metres by 500 metres. Grid cells with no data are assigned the value -9999.
  Completeness_Report: The final gridded surface was clipped based on the Granite Wash extent and the spatial distribution of data.
  Positional_Accuracy
    Horizontal_Positional_Accuracy
   Horizontal_Positional_Accuracy_Report: See AGS DIG 2025-0017 (data points) for details on the horizontal accuracy of the input point data, which is affected by the locational accuracy of the wells.
    Vertical_Positional_Accuracy
   Vertical_Positional_Accuracy_Report: See AGS DIG 2025-0017 (data points) for details on the horizontal accuracy of the input point data, which is affected by the locational accuracy of the wells.
  Lineage
    Source_Information
      Source_Citation
        Citation_Information
          Originator: Alberta Energy Regulator
          Originator: Alberta Geological Survey
          Originator: Nakevska, N.
          Publication_Date: 2025
          Title: Distribution of Total Dissolved Solids in the Granite Wash in Alberta (tabular data, tab-delimited format)
          Geospatial_Data_Presentation_Form: tabular digital data
          Series_Information
            Series_Name: Digital Data
            Issue_Identification: DIG 2025-0017
          Publication_Information
            Publication_Place: Edmonton, Alberta, Canada
            Publisher: Alberta Geological Survey
          Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0017
   Source_Scale_Denominator: 
   Type_of_Source_Media: online
        Source Time Period of Content
          Time Period Information
            Single Date/Time
       Calendar_Date: 2025
     Source_Currentness_Reference: publication date
     Source_Citation_Abbreviation: DIG 2025-0017
     Source_Contribution: Calculated total disolved solids data
    Process_Step
   Process_Description: Step 1 (Modelling the surface): A simple kriging algorithm was used in the ArcGIS Pro Geostatistical Analyst extension to interpolate the TDS values and create a grid of the TDS distribution in the Granite Wash. 
Method Report:
Output surface type: Prediction
Transformation type: Normal score
Decluster: True (polygonal)
Function type: Semivariogram
Type: Spherical
Neighbourhood type: smooth
Smoothing factor: 0.1
Step 2 (Grid alteration): The final gridded surface was clipped based on the Granite Wash extent and the spatial distribution of data. Interpolation was extended into data-sparse areas where the TDS trend appeared reasonable.
   Process_Date: 2025
  Data_Quality_Information: 
Spatial_Data_Organization_Information: Spatial_Data_Organization_Information: 
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information: 
Raster_Object_Type: Grid Cell
Row_Count: 529
Column_Count: 569
Spatial_Reference_Information: Spatial_Reference_Information: 
Horizontal_Coordinate_System_Definition: 
Planar: 
Map_Projection: 
Map_Projection_Name: NAD_1983_Transverse_Mercator
Transverse_Mercator: 
Scale_Factor_at_Central_Meridian: 0.9992
Longitude_of_Central_Meridian: -115.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Geodetic_Model: 
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-Major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information: Entity_and_Attribute_Overview: Grid cell values represent the TDS concentration, expressed as mg/L, in the Granite Wash in Alberta. Values are floating point data type.
  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: 2nd 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: 20251128
    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: 2nd 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
