  Identification_Information
    Citation
      Citation_Information
        Originator: Alberta Energy Regulator
        Originator: Alberta Geological Survey
        Originator: Nakevska, N.
        Publication_Date: 2026
        Title: Distribution of Hydraulic Head in the Gilwood Member (Watt Mountain Formation) in Alberta (gridded data, ASCII format)
        Geospatial_Data_Presentation_Form: raster digital data
        Series_Information
          Series_Name: Digital Data
          Issue_Identification: DIG 2025-0016
        Publication_Information
          Publication_Place: Edmonton, Alberta, Canada
          Publisher: Alberta Geological Survey
        Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0016
    Description
      Abstract: This grid represents the hydraulic head distribution in the Gilwood Member (Watt Mountain Formation) in Alberta. The grid is a result of a geostatistical model constructed using pressure data from oil and gas drillstem tests and a reference formation water density of 1.117 g/cm, representative of formation waters in the Gilwood Member and Granite Wash.
The hydraulic head surface was mapped at a regional scale using many years of data, thus providing a general indication of regional groundwater flow within the unit rather than site-specific values.
      Purpose: To provide a gridded dataset representing the distribution of hydraulic head in the Gilwood Member (Watt Mountain Formation) 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: -119.7886
      East_Bounding_Coordinate: -114.0572
      North_Bounding_Coordinate: 57.6636
      South_Bounding_Coordinate: 53.7868
  Keywords
    Theme
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: drillstem test
      Theme_Keyword: gilwood member
      Theme_Keyword: groundwater
      Theme_Keyword: hydraulic head
      Theme_Keyword: hydrogeology
      Theme_Keyword: potentiometric surface
    Place
      Place_Keyword_Thesaurus: ISO 19115 Topic Category
      Place_Keyword: alberta
      Place_Keyword: canada
      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 Hydraulic Head in the Gilwood Member (Watt Mountain Formation) in Alberta (tabular data, tab-delimited format)
      Geospatial_Data_Presentation_Form: tabular digital data
      Series_Information
        Series_Name: Digital Data
        Issue_Identification: DIG 2025-0012
      Publication_Information
        Publication_Place: Edmonton, Alberta, Canada
        Publisher: Alberta Geological Survey
      Online_Linkage: https://ags.aer.ca
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: 0.77 m
Root mean square error: 11.7 m
Average standard error: 13.4 m
Root mean square standardized: 0.9
  Logical_Consistency_Report: Grid cell spacing is 500 m by 500 m. Grid cells with no data are assigned the value -9999.
  Completeness_Report: The final hydraulic head surface map is clipped based on the esimated extent of the Gilwood Member and the spatial extent of available data.
  Positional_Accuracy
    Horizontal_Positional_Accuracy
   Horizontal_Positional_Accuracy_Report: See AGS DIG 2025-0012 (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 2025-0012 (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 Hydraulic Head in the Gilwood Member (Watt Mountain Formation) in Alberta (tabular data, tab-delimited format)
          Geospatial_Data_Presentation_Form: tabular digital data
          Series_Information
            Series_Name: Digital Data
            Issue_Identification: DIG 2025-0012
          Publication_Information
            Publication_Place: Edmonton, Alberta, Canada
            Publisher: Alberta Geological Survey
          Online_Linkage: https://ags.aer.ca/publications/all-publications/dig-2025-0012
   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 2025-0012
     Source_Contribution: hydraulic head data
    Process_Step
   Process_Description: The selection criteria and the final data set used for interpolation of this grid are documented in the metadata for AGS DIG 2025-0012. Step 1 (Modelling the surface): An empirical Bayesian kriging algorithm was used in the ArcGIS Pro Geostatistical Analyst extension to interpolate the hydraulic head values and create a grid of the hydraulic head surface for the Gilwood Member.
Method report:
Output surface type: Prediction
Semivariogram type: Power
Neighbourhood type: standard circular
Maximum neighbours; 15
Minimum neighbours: 10
Sector type: 4 sectors with 45 degrees
Step 2 (Grid Alterations): The final grid was clipped based on the estimated extent of the Gilwood Member, and spatial distribution of data.
   Process_Date: 2025
  Data_Quality_Information: 
Spatial_Data_Organization_Information: 
Spatial_Reference_Information: 
Entity_and_Attribute_Information: Entity_and_Attribute_Overview: Grid cell values represent the distribution of hydraulic head in metres above sea level within the Gilwood Member (Watt Mountain Formation) 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
