Introduction The digital dataset contained in this directory was developed from selected reports published by the U.S. Geological Survey between 1951 and 1996. These reports contain maps and data depicting the extent and elevation of both time-stratigraphic and hydrogeologic units. The five primary reports used for this dataset compilation are Circular 91 (Applin, 1951), Professional Paper 447 (Applin and Applin, 1965), Professional Paper 524-G (Applin and Applin, 1967), Professional Paper 1088 (Brown and others, 1979), and Professional Paper 1410-B (Renken, 1996). The accompanying Data Series 662 Report, Digital surfaces and hydrogeologic data for the Mesozoic through early Tertiary rocks in the southeastern Coastal Plain in parts of Mississippi, Alabama, Georgia, South Carolina, and Florida, is available online at http://pubs.usgs.gov/ds/662. Inquiries about this publication should be addressed to: Director U.S. Geological Survey, Georgia Water Science Center 3039 Amwiler Road, Suite 130 Atlanta, GA 30360 Telephone: (770) 903-9208 Email: dc_ga@usgs.gov Getting Started This data series report is downloadable as the following compressed archives: ds662.gdb.zip ds662_well_data.mdb.zip ds662_scanned_images.zip ds662_shapefiles.zip The ds662.gdb.zip archive contains an ESRI (Environmental Systems Research Institute, Inc.) file geodatabase comprised of point, line, and polygon feature classes in addition to the rasterized structural surfaces. All features and rasters in this geodatabase are organized by the source report from which they were derived. Archive ds662_well_data.mdb.zip contains a Microsoft Access™ database comprised of basic data for wells used to develop the structural contours in the following USGS Professional Paper reports: 1088 (Brown, 1979), 447 (Applin and Applin, 1965), and 524g (Applin and Applin, 1967). Archives *_scanned_images.zip contain georeferenced .tif images of each of the map plates that were used in this data series report. Archive ds662_shapefiles.zip is a sub-product of the file geodatabase and contains all of the vector (point, line, and polygon) features contained therein stored in the ESRI shapefile format. Note that the rasterized structural surfaces are only available by downloading the ds662.gdb.zip archive. Additional compressed archives are available to facilitate the download of all shapefiles or scanned images on an individual basis or by sub-report. File Names An abbreviated naming convention was used for all files in this data series report. The general format is a four-part name identifying the source report, source plate or figure number, geologic unit name, and the nature of the data (structure top, bottom, or thickness); each of the four parts of the file names are separated by an underscore. For example, file “pp524g_plt05d_lwslm_tp.tif” refers to a scanned image from U.S. Geological Survey Professional Paper 524g, plate 5d, depicting the top of the lower member of the Lawson Limestone. Table 1 of this report provides detailed descriptions of each file name so that the reader can more easily decipher the abbreviated geologic unit names. Projections and Coordinate Systems All geospatial datasets use either a Lambert Conformal Conic or an Albers Conical Equal Area projection. The original paper maps from the source reports were based on the U.S. Geological Survey State Base Map series which used a Lambert Conic Conformal projection (North American Datum of 1927, standard parallels at 33 and 45 degrees, and central meridian at -96 degrees). The scanned images of these paper maps, therefore, share the same coordinate system and were not reprojected. All subsequent data digitized from the scanned images were transformed to the Albers Conical Equal Area projection with standard parallels and central meridian suited to the study area (North American Datum of 1983, standard parallels at 29.5 and 45.5 degrees, and central meridian at -84 degrees). To install: 1. Download desired zip file(s) to local hard drive 2. Open with Winzip or other zip utility and click the "Extract" button 3. Extract contents to a destination folder on the local hard drive Metadata Each feature class has associated metadata viewable and exportable through ArcCatalog. To view the metadata file, simply click on the feature class in ArcCatalog and then click the Metadata/ Description tab. Suggested Citation Cannon, D.M., Bellino, J.C., and Williams, L.J., 2012, Digital surfaces and hydrogeologic data for the Mesozoic through early Tertiary rocks in the Southeastern Coastal Plain in parts of Mississippi, Alabama, Georgia, South Carolina, and Florida: U.S. Geological Survey Data Series 662, available online only at http://pubs.usgs.gov/ds/662. References Applin, P.L., 1951, Preliminary report on buried pre-Mesozoic rocks in Florida and adjacent states: U.S. Geological Survey Circular 91, 28 p., accessed at http://onlinepubs.er.usgs.gov/djvu/CIR/circ_91.djvu. Applin, P. L., and Applin, E.R., 1965, The Comanche series and associated rocks in the subsurface in central and south Florida: U.S. Geological Survey Professional Paper 447, 84 p., 11 plates, accessed at http://onlinepubs.er.usgs.gov/djvu/PP/pp_447.djvu. Applin, P.L., and Applin, E.R., 1967, The Gulf series in the subsurface in northern Florida and southern Georgia: U.S. Geological Survey Professional Paper 524-G, 35 pp, 8 plates, accessed at http://onlinepubs.er.usgs.gov/djvu/PP/pp_524_g.djvu. Brown, P.M., Brown, D.L, Reid, M.S., Lloyd Jr., O.B., 1979, Evaluation of the geologic and hydrologic factors related to the waste-storage potential of Mesozoic aquifers in the southern part of the Atlantic Coastal Plain, South Carolina and Georgia: U.S. Geological Survey Professional Paper 1088, 37 p., 11 plates, accessed at http://onlinepubs.er.usgs.gov/djvu/PP/pp_1088.djvu. Renken, R.A., 1996, Hydrogeology of the southeastern coastal plain aquifer system in Mississippi, Alabama, Georgia, and South Carolina: U.S. Geological Survey Professional Paper 1410-B, 101 p., 42 plates, accessed at http://onlinepubs.er.usgs.gov/djvu/PP/pp_1410_b.djvu. Wait, R.L., and Davis, M.E., 1986, Configuration and hydrology of the pre-Cretaceous rocks underlying the Southeastern Coastal Plain aquifer system: U.S. Geological Survey Water-Resources Investigations Report 86-4010, 1 sheet, accessed at http://onlinepubs.er.usgs.gov/djvu/WRI/wrir_86_4010.djvu.