Thermal Infrared data for USGS OFR 2010-1120 (http://pubs.usgs.gov/of/2010/1120). Data are provided in three formats: 1. GeoTIFF images of full-range thermal values and image values calibrated to degrees Fahrenheit. 2. Polygon shape files for three landscape zones to depict significant thermal anomalies at four levels and a point shape file of select thermal anomaly polygon centroids. 3. Metadata for each data file in .xml format When using these data, please give credit to the U.S. Geological Survey, St. Petersburg, FL, by referencing the source: Raabe, Ellen A., and Bialkowska-Jelinska, Elzbieta, 2010, Thermal imaging of the Waccasassa Bay Preserve: Image acquisition and processing: U.S. Geological Survey Open File Report 2010-1120, 61 p., available at http://pubs.usgs.gov/of/2010/1120/. TABLE OF CONTENTS: Disclaimer System Requirements Project Summary Data Organization Getting Started Acknowledgments Contacts References DISCLAIMER Any use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Ensure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests. USGS Standard Disclaimer: This publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Neither the U.S. Government, the Department of the Interior, nor the USGS, 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 any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. SYSTEM REQUIREMENTS The minimum software requirements are a text reader, a browser, Adobe Acrobat Reader, image-viewing software, and a computer mapping program (such as ESRI ArcMap). PROJECT SUMMARY This data release includes several layers of information derived from thermal infrared imagery acquired between 2 and 4 am March 30, 2009 by the USGS in cooperation with Florida State Parks, and Florida Springs Initiative. Airborne thermal infrared (TIR) imagery was acquired by Verimap, Inc. along coastal Levy County, Florida, to map groundwater-discharge in Waccasassa Bay Preserve State Park (WBPSP). Groundwater discharge is thermally distinct in winter when Floridan aquifer temperature, 71-72 °F, contrasts with the surrounding cold surface waters. Calibrated imagery at 2m resolution was analyzed to assess temperature anomalies and related thermal plumes. The influence of warm Gulf water and image artifacts on small features was constrained by image evaluation in three separate zones: Creeks, Bay, and Gulf. Four levels of significant water-temperature anomalies were identified and mapped as polygons, and 488 sites of interest were mapped in a point file. Among the sites identified, 80 were determined to be artificial or associated with human activity, such as excavation pits and the Florida Barge Canal, or image artifacts. Naturally occurring seeps were located in karst ponds and tidal creeks, and several submerged sites were detected in Waccasassa River and Bay, representing the first documentation of submarine vents in the Waccasassa region. Drought conditions throughout the region placed constraints on positive feature identification. Low discharge or displacement by landward movement of saltwater may have reduced or reversed flow during this season. Only two-thirds of seep locations in the overlap between 2009 and 2005 TIR night imagery were positively re-identified in 2009. These results indicate a 33 percent chance of feature omission in the 2009 imagery. This assessment of seep location and distribution contributes to an understanding of the underlying geology and the role of subsurface features on groundwater flow paths in the region. DATA ORGANIZATION Three data folders and one information file. The information file is: 1. readme.txt - This file contains a description of Data folder contents. Recommend user read first. The Data Folders are: 1. Shapefiles - This folder contains four ArcMap shapefiles, 3 polygon and 1 point file. Three zones were used for analysis: Creek, Bay, and Gulf. A polygon shapefile was developed for each zone to depict significant thermal anomalies at four levels: Level 1 = 90% C.I., Level 2 = 95% C.I., Level 3 = 98% C.I., and Level 4 = 99% C.I. (creek_sigrecpoly.shp, bay_sigpoly.shp, gulf_sigpoly.shp). An edited point shapefile depicts select Level 4 thermal anomaly polygon centroids, labeled as either "natural" or "manmade" (sig4pts_merge_label.shp). 2. Thermal images - This folder contains two GeoTIFF versions of the 6.5 ft (~2m) resolution image (UTM NAD83 Zone 17): 1. Full range thermal values 11-255 (Thermal_09_fullrange.tif), and 2. Image values calibrated to degrees Fahrenheit 44-70 (Thermal_09_fahr.tif). 3. Metatdata directory - This folder contains six metatdata files in .xml format, one for each of the data files described in Folders 1 and 2. GETTING STARTED To access the information contained in this release, download zipped folder and use computer-specific software to unzip and view. ACKNOWLEDGMENTS The authors acknowledge the support and time of Kristen Ebersol, WBPSP manager, Kathryn Holland with the Florida Springs Initiative, Jeff DiMaggio, former WBPSP manager, David Stonehouse of Verimap, Inc., Rick Spechler, USGS, and many others. CONTACTS Ellen Raabe Physical Scientist U.S. Geological Survey 600 4th Street South St. Petersburg, FL 33701 727-803-8747 x3039 eraabe@usgs.gov REFERENCES Raabe, E.A., and Bialkowska-Jelinska, E., 2007, Temperature anomalies in the Lower Suwannee River and tidal creeks, Florida, 2005: U.S. Geological Survey Open-File Report 2007-1311, http://pubs.usgs.gov/of/2007/1311/. Raabe, E.A., Stonehouse, D., Ebersol, K., Holland, K., and Robbins, L. 2011, Detection of Coastal and Submarine Seeps on Florida's Gulf Coast with an Airborne Thermal Infrared System, The Professional Geologist, Volume 49, http://www.aipg.org/Publications/TPGPublic.html Stonehouse, David, 2009, Thermal Infrared and Multi-Spectral Mapping Project for The Department of Environmental Protection Waccasassa Bay Preserve State Park Cedar Key Scrub State Reserve, Verimap Plus, Inc., Calgary, AB, CA, 20 p.,http://www.verimap.com/