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wcab_sed_thk_tm.asc.xml
<?xml version="1.0"?>
<metadata>
<idinfo>
<citation>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Sediment Thickness (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0016</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://ags.aer.ca/document/DIG/DIG_2017_0016.zip</onlink> </citeinfo>
</citation>
<descript>
<abstract>This grid dataset is part of the 3D stratigraphic model of west-central Alberta (WCAB). The grid is a rendering of the thickness and distribution of sediment overlying the WCAB bedrock topography.
The thickness and distribution of sediments overlying the bedrock surface in WCAB is highly varied, ranging from less than 1 m to as much as 125 m. These sediments include Paleogene fluvial deposits, glaciogenic materials deposited during Quaternary glaciation, as well as postglacial sediments.
This dataset supplements Alberta Geological Survey (AGS) Report 93, which includes a full description of the process used to produce the sediment thickness grid.</abstract>
<purpose>To provide the sediment thickness grid from the 3D stratigraphic model of WCAB, which can provide information needed to support land-use planning and management decisions in the shallow subsurface.</purpose>
<supplinf>Language: In English;</supplinf>
</descript>
<timeperd>
<timeinfo>
<rngdates>
<begdate>20150301</begdate>
<enddate>20161231</enddate>
</rngdates>
</timeinfo>
<current>ground condition</current>
</timeperd>
<status>
<progress>Complete</progress>
<update>None planned</update>
</status>
<spdom>
<bounding>
<westbc>-118.72029</westbc>
<eastbc>-115.547216</eastbc>
<northbc>55.040939</northbc>
<southbc>53.409709</southbc>
</bounding>
</spdom>
<keywords>
<theme>
<themekt>none</themekt>
<themekey>3d models</themekey>
<themekey>bedrock topography</themekey>
<themekey>boreholes</themekey>
<themekey>data</themekey>
<themekey>geology</themekey>
<themekey>gis data</themekey>
<themekey>glacial deposits</themekey>
<themekey>gravel</themekey>
<themekey>hydrostratigraphy</themekey>
<themekey>outcrop</themekey>
<themekey>paleogene</themekey>
<themekey>sediment thickness</themekey>
<themekey>surficial geology</themekey>
</theme>
<theme>
<themekt>ISO 19115 Topic Category</themekt>
<themekey>geoscientificInformation</themekey>
</theme>
<place>
<placekt>none</placekt>
<placekey>83e</placekey>
<placekey>83f</placekey>
<placekey>83g</placekey>
<placekey>83j</placekey>
<placekey>83k</placekey>
<placekey>83l</placekey>
<placekey>alberta</placekey>
<placekey>canada</placekey>
<placekey>edson</placekey>
<placekey>fox creek</placekey>
<placekey>hinton</placekey>
<placekey>west central alberta</placekey>
<placekey>whitecourt</placekey>
</place>
</keywords>
<accconst>Public</accconst>
<useconst>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.</useconst>
<ptcontac>
<cntinfo>
<cntorgp>
<cntorg>Alberta Geological Survey</cntorg>
<cntper>AGS Information Manager</cntper>
</cntorgp>
<cntpos>AGS Information Manager</cntpos>
<cntaddr>
<addrtype>mailing and physical</addrtype>
<address>Alberta Energy Regulator</address>
<address>4th Floor, Twin Atria Building</address>
<address>4999-98 Avenue NW</address>
<city>Edmonton</city>
<state>Alberta</state>
<postal>T6B 2X3</postal>
<country>Canada</country>
</cntaddr>
<cntvoice>(780) 638-4491</cntvoice>
<cntfax>(780) 422-1459</cntfax>
<cntemail>AGS-Info@aer.ca</cntemail>
<hours>8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.</hours>
</cntinfo>
</ptcontac>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>3D Rendering of the Regional Stratigraphy of Paleogene−Quaternary Sediments in West-Central Alberta</title>
<geoform>document</geoform>
<serinfo>
<sername>Report</sername>
<issue>REP 93</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<othercit>ISBN: 978-1-4601-0170-4</othercit>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Top of Stratigraphic Unit 1 Within the Paleogene−Quaternary Succession (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0010</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Top of Stratigraphic Unit 3 Within the Paleogene−Quaternary Succession (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0011</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Top of Stratigraphic Unit 4a Within the Paleogene−Quaternary Succession (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0012</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Top of Stratigraphic Unit 4b Within the Paleogene-Quaternary Succession (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0013</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Top of Stratigraphic Unit 5 Within the Paleogene-Quaternary Succession (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0014</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Bedrock Topography (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0015</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Paleovalley Thalwegs (GIS data, line features)</title>
<geoform>vector digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0018</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
<crossref>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Hartman, G.M.D.</origin>
<origin>Smith, D.</origin>
<origin>Hughes, A.T.</origin>
<origin>Atkinson, L.A.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Measured Section Descriptions (NTS 83F, 83K) (tabular data, tab-delimited format)</title>
<geoform>tabular digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2016-0047</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
<onlink>http://www.ags.aer.ca</onlink>
</citeinfo>
</crossref>
</idinfo>
<dataqual>
<attracc>
<attraccr>Lithological descriptions from the 2015 version of Alberta Environment’s Alberta Water Well Information Database (AWWID) were used to generate stratigraphic assignments to define the bedrock topography modelled grid. Water-well data were considered to be relatively low quality, often containing inaccurate location and lithology data submitted by water well contractors. The data were checked for obvious errors, including incorrect or ambiguous lithological descriptions and anomalous location information. Apparent errors were flagged and compared with higher quality data where it was available, i.e., moderate-to high-quality AGS boreholes and field data, geophysical logs, and previously published geological and hydrogeological maps, interpreted contours, and synthetic data points. Where no higher quality data were available to validate flagged records, the water well data were rejected. Additional information on data quality and the location of higher quality data in the WCAB is available in AGS Report 93.</attraccr>
</attracc>
<logic>The gridded data indicates the thickness of sediments in metres that lie on the WCAB bedrock topography. The data are in Esri ASCII grid format. NODATA_value for the ASCII grid outside of the study area domain is coded as -9999.</logic>
<complete>17997 data points of varying quality and coverage were compiled for the construction of the WCAB bedrock topography. The most significant data source was the extensive collection of well records compiled in the AWWID. The AWWID has abundant, relatively low-quality data records, which include location inaccuracies resulting in numerous wells with duplicate locations. In cases of collocated data, water-well records were evaluated on cross-section to consider surrounding data and the accuracy of lithology information contained within the record. This was a manual process to identify the most correct duplicate well litholog to ensure the bedrock topography was delineated properly in real and synthetic data. Water-well records that were not considered to be correct were maintained in a final database, but not used as input for the modelled surface.
The 17997 data points were used to model the WCAB bedrock topography. The WCAB sediment thickness grid was created by subtracting the WCAB bedrock topography from the Sustainable Resource Development (SRD; 12 m cell size) digital elevation model (DEM) (resampled to a 200 m grid cell size), which represents the present-day land surface.</complete>
<posacc>
<horizpa>
<horizpar>x,y coordinates of water wells exported from the AWWID are inexact and typically located to the centroid of a quarter section. The locations were converted to geographic coordinates and were not checked for accuracy.</horizpar>
</horizpa>
<vertacc>
<vertaccr>All borehole, interpreted contours and synthetic data were sampled to the 12 m provincial digital elevation model (DEM) to provide a borehole top elevation (m asl) to correlate lithological descriptions between boreholes to create the WCAB bedrock topography. This process was necessary as the elevation of AWWID water wells, in many cases, was not available/recorded or verified, and if reported was estimated from a topographic map, field investigation or handheld Global Positional System (GPS) device. GPS devices have accuracies reported by the AWWID of ~1-30 m, but are of varying device quality and cannot be assessed for accuracy between devices. Elevation values of moderate- and high-quality data from AGS boreholes and fieldsites, geophysical logs, and previously published geological and hydrogeological maps were also checked with the DEM to verify elevation accuracy and modified to match the DEM, if necessary.
The vertical accuracy of the 12 m DEM is stated as 5 m @ 90% in the WCAB derived from 1:60 000 aerial photographs using photogrammetric methods.</vertaccr>
</vertacc>
</posacc>
<lineage>
<srcinfo>
<srccite>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>MacCormack, K.E.</origin>
<origin>Lyster, S.</origin>
<origin>Atkinson, N.</origin>
<pubdate>201606</pubdate>
<title>Bedrock Topography of Alberta (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2016-0039</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
</citeinfo>
</srccite>
<srcscale>0</srcscale>
<typesrc>online</typesrc>
<srctime>
<timeinfo>
<rngdates>
<begdate>201309</begdate>
<enddate>201503</enddate>
</rngdates>
</timeinfo>
<srccurr>ground condition</srccurr>
</srctime>
<srccitea>Bedrock Topography of Alberta</srccitea>
<srccontr>Interpreted contour and synthetic data points were subsampled from the input data for this grid and used for the WCAB bedrock topography gridded surface.</srccontr>
</srcinfo>
<srcinfo>
<srccite>
<citeinfo>
<origin>Alberta Environment</origin>
<pubdate></pubdate>
<title>Alberta Water Well Information Database</title>
<geoform>database</geoform> <pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Environment</publish>
</pubinfo>
</citeinfo>
</srccite>
<srcscale>0</srcscale>
<typesrc>database</typesrc>
<srctime>
<timeinfo>
<rngdates>
<begdate>1901</begdate>
<enddate>201411</enddate>
</rngdates>
</timeinfo>
<srccurr>ground condition</srccurr>
</srctime>
<srccitea>AWWID</srccitea>
<srccontr>Water well lithological descriptions.</srccontr>
</srcinfo>
<srcinfo>
<srccite>
<citeinfo>
<origin>Alberta Energy Regulator</origin>
<origin>Alberta Geological Survey</origin>
<origin>Atkinson, L.A.</origin>
<origin>Hartman, G.M.D.</origin>
<pubdate>2017</pubdate>
<title>West-Central Alberta Regional Stratigraphic Model - Bedrock Topography (gridded data, ASCII format)</title>
<geoform>raster digital data</geoform>
<serinfo>
<sername>Digital Data</sername>
<issue>DIG 2017-0015</issue>
</serinfo>
<pubinfo>
<pubplace>Edmonton, Alberta, Canada</pubplace>
<publish>Alberta Geological Survey</publish>
</pubinfo>
</citeinfo>
</srccite>
<srcscale>0</srcscale>
<typesrc>online</typesrc>
<srctime>
<timeinfo>
<rngdates>
<begdate>20150301</begdate>
<enddate>20161231</enddate>
</rngdates>
</timeinfo>
<srccurr>ground condition</srccurr>
</srctime>
<srccitea>WCAB bedrock topography</srccitea>
<srccontr>Gridded bedrock topography in WCAB.</srccontr>
</srcinfo>
<procstep>
<procdesc>Methodology to create this grid dataset is fully documented in AGS Report 93.
This gridded dataset was derived by subtracting the computer-generated geostatistical model of the WCAB bedrock topography from the DEM (sourced from Sustainable Resource Development; 12 m cell-size and resampled to a 200 m grid cell size), which represents the present-day land surface.
Data used to construct the WCAB bedrock topography were derived from a variety of low- to high-quality borehole data, including lithologs submitted by water well contractors and compiled by the Alberta Water Well Information Database (AWWID), downhole geophysical logs collected from water wells and coal surveys conducted by the Alberta Research Council, AGS borehole logs and field data; stratigraphic picks made from oil and gas geophysical logs by AGS geologists; contour data from the Bedrock Topography of Alberta; and the DEM, where known bedrock outcrop locations were made equal to the elevation value of the DEM.</procdesc>
<procdate>2016</procdate>
</procstep>
</lineage>
</dataqual>
<spdoinfo>
<direct>Raster</direct>
<rastinfo>
<rasttype>Grid Cell</rasttype>
<rowcount>878</rowcount>
<colcount>1008</colcount>
</rastinfo>
</spdoinfo>
<spref>
<horizsys>
<planar>
<mapproj>
<mapprojn>NAD 1983 Transverse Mercator</mapprojn>
<transmer>
<sfctrmer>0.9992</sfctrmer>
<longcm>-115.0</longcm>
<latprjo>0.0</latprjo>
<feast>500000.0</feast>
<fnorth>0.0</fnorth>
</transmer>
</mapproj>
<planci>
<plance>coordinate pair</plance>
<coordrep>
<absres>0.000000002219135986081256</absres>
<ordres>0.000000002219135986081256</ordres>
</coordrep>
<plandu>meter</plandu>
</planci>
</planar>
<geodetic>
<horizdn>D North American 1983</horizdn>
<ellips>GRS 1980</ellips>
<semiaxis>6378137.0</semiaxis>
<denflat>298.257222101</denflat>
</geodetic>
</horizsys>
</spref>
<eainfo>
<overview>
<eaover>Grid cell values represent the sediment thickness of Neogene-Quaternary deposits in metres. Values are floating point data type. Null data are coded &apos;-9999&apos;.</eaover>
</overview>
</eainfo>
<distinfo>
<distrib>
<cntinfo>
<cntorgp>
<cntorg>Alberta Geological Survey</cntorg>
<cntper>AGS Information Manager</cntper>
</cntorgp>
<cntpos>AGS Information Manager</cntpos>
<cntaddr>
<addrtype>mailing and physical</addrtype>
<address>Alberta Energy Regulator</address>
<address>4th Floor, Twin Atria Building</address>
<address>4999-98 Avenue NW</address>
<city>Edmonton</city>
<state>Alberta</state>
<postal>T6B 2X3</postal>
<country>Canada</country>
</cntaddr>
<cntvoice>(780) 638-4491</cntvoice>
<cntfax>(780) 422-1459</cntfax>
<cntemail>AGS-Info@aer.ca</cntemail>
<hours>8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.</hours>
</cntinfo>
</distrib>
<distliab>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&apos;s product.</distliab>
</distinfo>
<metainfo>
<metd>20170329</metd>
<metc>
<cntinfo>
<cntorgp>
<cntorg>Alberta Geological Survey</cntorg>
<cntper>AGS Information Manager</cntper>
</cntorgp>
<cntpos>AGS Information Manager</cntpos>
<cntaddr>
<addrtype>mailing and physical</addrtype>
<address>Alberta Energy Regulator</address>
<address>4th Floor, Twin Atria Building</address>
<address>4999-98 Avenue NW</address>
<city>Edmonton</city>
<state>Alberta</state>
<postal>T6B 2X3</postal>
<country>Canada</country>
</cntaddr>
<cntvoice>(780) 638-4491</cntvoice>
<cntfax>(780) 422-1459</cntfax>
<cntemail>AGS-Info@aer.ca</cntemail>
<hours>8:00 a.m. to 12:00 p.m. and 1:00 p.m. to 4:30 p.m.</hours>
</cntinfo>
</metc>
<metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
<metstdv>FGDC-STD-001-1998</metstdv>
<mettc>local time</mettc>
<metac>none</metac>
<metuc>none</metuc>
</metainfo>
</metadata>
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