Building a Water Well Building a Water Well Database for GIS Database for GIS AnalysisAnalysis

By By A. Wayne Jones, Kelly A. BarrettA. Wayne Jones, Kelly A. BarrettOhio Department of Natural ResourcesOhio Department of Natural Resources

Division of WaterDivision of Water

ObjectivesObjectives

Transfer of well log data from Transfer of well log data from paper to databasepaper to database

Edit well log databaseEdit well log database Convert flatline files to GIS datasetConvert flatline files to GIS dataset TIN ModelingTIN Modeling Create and support Division of Create and support Division of

Water productsWater products

Software UsedSoftware Used

Microsoft Access and Excel (2002)Microsoft Access and Excel (2002) Oracle 10G Release 1Oracle 10G Release 1 Flotiva from Workiviti (8-1-6)Flotiva from Workiviti (8-1-6) Arc Map, Arc Catalog, Arc Toolbox Arc Map, Arc Catalog, Arc Toolbox

(9.1) (Spatial Analyst, 3-D (9.1) (Spatial Analyst, 3-D Analyst)Analyst)

Arc Workstation (9.1)Arc Workstation (9.1)

Well log locations Well log locations from field locatingfrom field locating

Over 800,000 well Over 800,000 well log recordslog records– Less than 200,000 Less than 200,000

have coordinateshave coordinates Geocoded 3 Geocoded 3

counties with counties with excellent resultsexcellent results

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Digitized point Digitized point files on CD for files on CD for each countyeach county

Verify with well Verify with well log databaselog database– location map year location map year – township codetownship code– location numberlocation number– location arealocation area

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Microsoft Access 2000 is the front end Microsoft Access 2000 is the front end to Oracle databaseto Oracle database

Digital Line GraphsDigital Line Graphs

USGS Digital Line GraphUSGS Digital Line Graph– Downloaded from Ohio Center for MappingDownloaded from Ohio Center for Mapping– 1:24,000 scale1:24,000 scale– Hypsography layerHypsography layer

During AML dlg file recodes major and minor codes (Elevation During AML dlg file recodes major and minor codes (Elevation items are defined)items are defined)

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

AML Menu for Recoding DLG items

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Converting DLG to TINConverting DLG to TIN

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

TINSPOT defines surface TINSPOT defines surface elevation at each well elevation at each well locationlocation

– Arc TINSPOT Command in Arc TINSPOT Command in Arc WorkstationArc Workstation

– TINSPOT uses the TINSPOT uses the interpolated elevation from interpolated elevation from the TIN model to define the the TIN model to define the elevation at the location of elevation at the location of the point coverage the point coverage

Water table elevation is Water table elevation is calculated by subtracting calculated by subtracting static water level from static water level from surface elevationsurface elevation

Applications for Digital Applications for Digital DataData

Potentiometric surface mappingPotentiometric surface mapping

Shapefiles of XY well log data with Shapefiles of XY well log data with query capacityquery capacity

Grid modellingGrid modelling

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Microsoft Access Microsoft Access table as a .DBF4 table as a .DBF4 export to create export to create shapefileshapefile

Multiple Query Multiple Query Options on shapefile Options on shapefile – All sand and gravel All sand and gravel

wells (left)wells (left)– All bedrock wellsAll bedrock wells– All wells in particular All wells in particular

quadranglequadrangleFranklin County

Create a spatial query Create a spatial query around a featurearound a feature

Select by attribute or Select by attribute or select by locationselect by location

All the sand and All the sand and gravel wells within 1 gravel wells within 1 mile of the Darby mile of the Darby Creek (left)Creek (left)

All bedrock wells All bedrock wells within 10 miles of US within 10 miles of US 7171

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Create a buffer “1 Create a buffer “1 mile radius” from mile radius” from the intersections the intersections of 2 streets or of 2 streets or any point any point location (right)location (right)

Popular query from Popular query from environmental environmental consulting firmsconsulting firms

Building a Water Well Database Building a Water Well Database for GIS Analysisfor GIS Analysis

Potentiometric Potentiometric Surface contoursSurface contours– Converted to a TIN Converted to a TIN

ModelModel TIN converted to TIN converted to

rasterraster Raster calculator to Raster calculator to

subtract gridssubtract grids Darby Creek Darby Creek

watershed posterwatershed poster

Thanks!!Thanks!! Ken Pendley, Rick Archer, Jim Raab, Mike Ken Pendley, Rick Archer, Jim Raab, Mike

Angle, ODNR, Division of WaterAngle, ODNR, Division of Water

Shashi Srivastava, Oracle Database Shashi Srivastava, Oracle Database Administrator, ODNR, Office of Information Administrator, ODNR, Office of Information TechnologyTechnology

Mark Anstaett, GIMS programmer, Office of Mark Anstaett, GIMS programmer, Office of Information TechnologyInformation Technology

Financial Support provided by the Ohio Financial Support provided by the Ohio Department of TransportationDepartment of Transportation