Ohio Division of Geological Survey 2003 1:24,000-scale bedrock-topography data points vector digital data BG 3B Columbus, OH Ohio Division of Geological Survey withheld BTPoints_Wood 1 CD-ROM, GIS file format. This data set contains surface and subsurface information used in the construction of the bedrock-topography maps for the state of Ohio. This data set was created as part of a project to create the new state bedrock-geology map for Ohio. The data in the dataset come from a number of different sources, which include water wells, ODOT bridge borings, Ohio EPA waste-disposal site borings, oil and gas wells, and information from published and unpublished reports, some of which are on file at the ODGS. Location information is plotted on 7.5-minute quadrangles. This data set was originally developed to aid in the mapping of the bedrock topography. en 1960's 2002 publication date Complete Irregular -83.998954 -83.296468 41.672849 41.109234 1558650.249945 1748949.625739 1136009.625557 1339092.750482 ODNR-CATEGORIES GEOLOGIC/SOILS None Bedrock Topography Bedrock Geology ODNR-COUNTIES Entire State ODNR-QUADS Entire State ODNR-STATE Ohio None Pleistocene Holocene Quaternary Tertiary There are no access constraints on this data set. This product of the Ohio Department of Natural Resources, Division of Geological Survey is intended to provide general geologic information only and should not be used for any other purpose. It is not intended for resale or to replace site-specific investigations. These data were compiled by the Ohio Division of Geological Survey, which reserves the publication rights to this material. If these data are used in the compilation of other data sets or maps for distribution or publication, this source must be referenced. Recommended bibliographic citation: Ohio Division of Geological Survey, 2003, Bedrock-topography data for Ohio: Ohio Geological Survey BG-3, 1 CD-ROM, GIS file format. The information contained herein may be updated or edited in the future. Future releases of this material, if altered, will display a revision date. Users should check to ensure they have the latest version and reference the appropriate revision date if it is being used in other works. Neither the Ohio Department of Natural Resources, nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of this product. Any use thereof for a purpose other than for which said information or product was intended shall be solely at the risk of the user. E. Mac Swinford Ohio Division of Geological Survey Geology Program Supervisor mailing and physical address
Ohio Division of Geological Survey
4383 Fountain Square Drive
Columbus OH 43224-1362 USA 614-265-6473 614-447-1918 mac.swinford@dnr.state.oh.us 8:30 a.m. - 5:30 p.m. ESRI ArcCatalog 8.3.0.800 E. Mac Swinford 1997 Remapping of the bedrock geology of Ohio completed document Ohio Geology Summer Columbus, OH Ohio Division of Geological Survey p. 1, 3 Personal GeoDatabase Feature Class Generally greater than 95%. Most data were verified against the source documents or scans of the source documents. Generally greater than 95%; most data went through visual examination by geologist Most data were reviewed for faithfulness to source documents. In some cases several layers of checking were performed. Some data was randomly spot checked. Topology for this data layer was built using the Arc/Info CLEAN and BUILD commands. The data points that are included in this data layer represent only a small percentage of the total data available from the original sources. Approximately 1,000,000 water wells and approximately 300,000 oil-and-gas wells have been drilled in the state of Ohio. Only wells that have usable depth-to-bedrock information and have good horizontal positional accuracy were used to create this data layer. Most data appearing on the source documents (bedrock-topography maps) have been captured and visually reviewed for accuracy of position and value. The amount of maps and data suggests that, statistically, some of these data would have been omitted by human error. Approximately 90% for the data. Reliability of data position varies with data type. Water-well-data position reliability can be good to poor. ODOT borings, Ohio EPA points, and oil-and-gas wells are generally highly accurate. Information taken from reports can vary in accuracy depending on author and platform. 90% Water wells, the largest data set, commonly are visually referenced to houses printed on topographic maps. When house is not posted on the topographic map, accuracy of position becomes poorer. Positions of other data sets are generally good. Data from reports can vary. Determination of the bedrock-surface elevation depended on: an accurate depth to bedrock recorded by the driller; clear information portrayed on the log to allow the geologist to determine depth to bedrock; accurate determination of surface elevation, generally from visual examination of the topographic map; and correct subtraction of depth to bedrock on the well from surface elevation . ± 10 feet Determination of the bedrock-surface elevation depended on: an accurate depth to bedrock recorded by the driller; clear information portrayed on the log to allow the geologist to determine depth to bedrock; accurate determination of surface elevation, generally from visual examination of the topographic map; and correct subtraction of depth to bedrock on the well from surface elevation. Ohio Division of Geological Survey Ohio Division of Water U.S. Geological Survey Various college and university Master's theses and Doctoral dissertations 1960-2002 Bedrock-topographic maps of Ohio Varies Mylar, Paper 1960's 2002 publication date ODGS-BTM This source contributed the data points used to create the bedrock-topography contours. Open-file bedrock-topography maps for each 7.5-minute quadrangle were generated as new products or were photographically reproduced from existing documents to match the 1:24,000 scale. This effort lasted from 1989 to 2002. withheld During the mapping process and after mapping was completed, ODGS moved forward on converting these hand-drawn lines into a digital format. When mapping was completed, approximately 30% of the 788 bedrock-topography maps had been digitized. withheld The remaining maps were sent to a subcontractor, where the maps were reviewed for discrepancies before being digitized. withheld Maps were color scanned. The scanned images were used as a source for heads-up digitizing. The source documents were available to the digitizing personnel as a reference. withheld Digital files were reviewed by the subcontractor's geological staff for accuracy of line work and line values. Files were delivered to ODGS in ARC format. withheld Dataset copied. withheld 20021212 Dataset copied. withheld 20040224 Vector Simple FALSE 0 TRUE FALSE coordinate pair 0.002048 0.002048 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_StatePlane_Ohio_South_FIPS_3402_Feet National Geodetic Vertical Datum of 1929 1 feet Explicit elevation coordinate included with horizontal coordinates BTPoints_Wood Line attribute data ODGS Feature Class 0 OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. OBJECTID OID 4 0 0 Shape Feature geometry. ESRI Coordinates defining the features. Shape Geometry 0 0 0 POINT_TYPE Code for the source of the data points. ODGS POINT_TYPE String 6 adp Approximate data point ODGS brexp Bedrock exposure ODGS epa Ohio EPA point ODGS fgww First-generation water well ODGS glexth Glacial exposure (thin) ODGS glextk Glacial exposure (thick) ODGS misc Miscellaneous point ODGS odot ODOT boring ODGS ogs Ohio Geological Survey corehole ODGS ogw Oil-and-gas well ODGS quarry Quarry ODGS usgs U.S. Geological Survey report well ODGS ww Water well, data from the Ohio Division of Water ODGS 0 0 SURF_ELEV SURF_ELEV Double 8 Elevation of the point at the land surface Surface elevation of the data point. Calculated using the USGS 30-meter DEM for the state of Ohio. ODGS 0 0 BOT_ELEV BOT_ELEV Integer 4 Elevation of the bedrock surface, as measured at the data point Elevation of the bedrock surface ODGS 0 0 BOT_ELEV_S BOT_ELEV_S String 1 - Indicates that the well did not reach bedrock. Such wells provide nominal depth to bedrock data and are considered to be useful for drawing bedrock topography. ODGS Suffix for the bottom elevation. Describes whether the well reached bedrock. ODGS 0 0 DEPTH DEPTH Integer 4 Depth to bedrock surface Depth to bedrock or bottom of well, as calculated by the geologist, using the estimated surface elevation from the topographic map and the bottom elevation. ODGS -99 Depth was not computed ODGS 0 0 DEPTH_SFX DEPTH_SFX String 1 + Indicates that the depth to bedrock is greater that what was measured. ODGS Indicates a well that does not reach bedrock. ODGS 0 0 DEPTH_CALC DEPTH_CALC Double 8 Depth to bedrock surface Depth to bedrock or bottom of the well, as calculated using the surface elevation (derived from the USGS 30-meter DEM for the state of Ohio) and the elevation of the bedrock surface. ODGS -99 Negative calculated depth ODGS -999 Not used in contouring ODGS -99999 No bottom elevation ODGS 0 0 DEPTH_C_S DEPTH_C_S String 1 + Indicates that the depth to bedrock is greater than what was measured. ODGS Suffix for the depth calculation. Indicates a well that does not reach bedrock. This attribute is to be used with the DEPTH_CALC attribute. ODGS 0 0 CONTOURED CONTOURED String 3 no The point was not used in contouring the bedrock topography. ODGS yes The point was used in contouring the bedrock topography. ODGS Indicates whether the point was used in contouring the map. ODGS 0 0 FIELD_VERI FIELD_VERI String 3 Indicates whether the data point was field verified. ODGS no The point was not verified in the field. ODGS yes The point was verified in the field. ODGS 0 0 ESTIMATED ESTIMATED String 3 Indicates whether the data value for the bottom elevation was estimated. ODGS null Unknown. ODGS no The data value was not estimated. ODGS yes The data value was estimated. ODGS 0 0 NOTE_ NOTE_ String 90 Comment field ODGS Free-text comment field. 0 0 Ohio Division of Geological Survey Geologic Records Center mailing and physical address
Geologic Records Center
Ohio Division of Geological Survey
4383 Fountain Square Drive
Columbus OH 43224-1362 USA 614-265-6576 614-447-1918 geo.survey@dnr.state.oh.us 8:30 a.m. - 4:30 p.m. Ohio Division of Geological Survey BG-2 None specified. SHP ArcGIS 8.2 32.144 32.144 CD-ROM Please contact the Geologic Records Center for more information. 1 day 20040305 20021105 James McDonald Ohio Division of Geological Survey GIMS Specialist 2 mailing and physical address
Ohio Division of Geological Survey
4383 Fountain Square Drive
Columbus OH 43224-1362 USA 614-265-6601 614-447-1918 jim.mcdonald@dnr.state.oh.us 8 a.m. - 5 p.m. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time There are no constraints on accessing the metadata. The metadata is not to be modified or removed from the dataset. Only personnel from the Ohio Division of Geological Survey may modify the metadata. N/A Unclassified N/A http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en 20231108 08340000 FALSE 20150108 16083800 20150108 16083800 BTPoints_Wood 002 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_Ohio_South_FIPS_3402_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.1'><WKT>PROJCS[&quot;NAD_1983_StatePlane_Ohio_South_FIPS_3402_Feet&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,1968500.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-82.5],PARAMETER[&quot;Standard_Parallel_1&quot;,38.73333333333333],PARAMETER[&quot;Standard_Parallel_2&quot;,40.03333333333333],PARAMETER[&quot;Latitude_Of_Origin&quot;,38.0],UNIT[&quot;Foot_US&quot;,0.3048006096012192],AUTHORITY[&quot;EPSG&quot;,3735]]</WKT><XOrigin>-119670699.99876633</XOrigin><YOrigin>-95612899.999779284</YOrigin><XYScale>1953.1249981810104</XYScale><ZOrigin>-100000</ZOrigin><ZScale>8000</ZScale><MOrigin>-100000</MOrigin><MScale>8000</MScale><XYTolerance>0.0040960000038146975</XYTolerance><ZTolerance>0.002</ZTolerance><MTolerance>0.002</MTolerance><HighPrecision>true</HighPrecision><WKID>102723</WKID><LatestWKID>3735</LatestWKID></ProjectedCoordinateSystem> 1.0 Version 6.2 (Build 9200) ; Esri ArcGIS 10.1.1.3300 BTPoints_Wood -83.998954 -83.296468 41.672849 41.109234 1 1558650.249945 1748949.625739 1339092.750482 1136009.625557 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network 32.144 Personal GeoDatabase Feature Class File Geodatabase Feature Class NAD_1983_StatePlane_Ohio_South_FIPS_3402_Feet EPSG 7.11.2 0 20150108