Please read this first. The data in the BB_Historic_OFR02_211Rev.zip file consist of newly reformatted data as a revision to USGS Open-File Report 02-211 (http://pubs.usgs.gov/of/2002/of02-211/). Data are provided in three formats: 1. T-sheet Mosiac - a GeoTIFF image of historic chart mosaic, 2. Historic Features - digitized historic features in ESRI ArcMap shapefile format, and 3. Maps - Maps of Florida's West Coast, showing features surveyed in the 19th century and digitized by USGS. When using this data, please give credit to the U.S. Geological Survey, St. Petersburg, FL, by referencing the source: Raabe, E.A., A.E. Streck, and R.P. Stumpf, 2004, Historic Topographic Sheets to Satellite Imagery: A Methodology for Evaluating Coastal Change in Florida's Big Bend Tidal Marsh, U.S. Geological Survey Open-File Report 02-211 (as revised in 2012); http://pubs.usgs.gov/of/2002/of02-211/ TABLE OF CONTENTS: Disclaimer System Requirements Project Summary DVD 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 Adobe Acrobat Reader and a text editor. A computer mapping program (such as ESRI ArcMap) or image processing software will permit user to open and view GeoTIFF image or vector shape-file. PROJECT SUMMARY Historic geographic data for Florida's Big Bend tidal wetlands (Wakulla to Pasco Counties) was derived from 19th century topographic charts (T-sheets). The United States (U.S.) Coast and Geodetic Survey (CGS) originally surveyed U.S. coastlines during the 19th century for navigation purposes. The Big Bend coast was surveyed by CGS between 1852 and 1886. Scanned images of 19 original historic T-sheets were acquired by the U.S. Geological Survey (USGS) in St. Petersburg, Florida. The USGS geo-rectified the T-sheets and combined them in a mosaic of the coast. Two data sets were prepared from the original surveys: 1. an image mosaic of 19 T-sheets from Wakulla to Pasco County at 5 meter resolution and 2. a vector shapefile of coastal features as digitized from the original T-sheets. A set of user-accessible maps (pdf format) illustrate the digitized 19th century coastal features. The raster image and vector data document historic conditions along the Big Bend marsh coast, depicting the coastal landscape as it appeared in the mid-1800s. Users of the data should be aware that the charts reflect survey methods and perspectives from the 19th century, and the shoreline and other features may have changed in the intervening years. This release does not include new or newly-interpreted data. Exisitng raster and vector data files were reformatted and added in 2012 as a revision to USGS Open-File Report 02-211 (Raabe and others, 2004; ). Historic survey data were converted to modern digital and geo-referenced formats to visualize the historic landscape and facilitate comparison between historic and present day conditions. The USGS Gulf of Mexico Tidal Wetlands Project evaluated and quantified long-term change (greater than 100 years) using four generalized categories from the digitized historic coastal features. Historic to modern assessments incorporate data from different sources and time periods to understand landscape change and the impact of natural processes and human activities on coastal ecosystems. Recovery of historic data to a digital setting responds to the need for data integration through time, bridging technical gaps and differences. See full metatdata for detailed information. DVD ORGANIZATION Four top-level directories and one top-level file. The top-level file is: 1. readme.txt - This file contains a description of .zip contents. Recommend user read first. The top-level directories are: 1. Directory BB_Historic_Maps\ - This directory contains ten maps (.pdf format): the T-sheet index and the digitized historic features for each of eight counties and for the entire Big Bend. A PDF format table (BB_Hist_Feat_table.pdf) shows the grid values, categories, and area (square meters) information that would be found in the vector file attribute table. The maps show historic coastal features digitized from original 19th century T-sheets. These maps were prepared for users without access to or knowledge of computer mapping software. Locational information is preserved in each map and can be accessed using Adobe Reader. Click >Edit >Analysis >Geospatial Location Tool. Move cursor to show latitude and longitude of feature of interest (in decimal degrees). These high-resolution files have zoom capability to show details of tidal creeks and other historic coastal features. 2. Directory BB_Historic_Shapefiles\ - This directory contains the shapefile, metadata (.txt and .xml), color enhancement of four general categories (.lyr), and all associated ESRI ArcMap files for the digitized 19th century coastal features. The shapefile attribute table includes the 20 original coastal categories, the aerial extent in meters squared, and the four generalized categories (submerged, intertidal, uplands, and freshwater wetlands) used in change analysis. The 20 original categories in the shapefile are the source for the pdf format maps in the directory above. 3. Directory BB_Tsheet_Mosaic\ - This directory contains a geo-referenced image file (.tif and .tfw) in GeoTIFF format depicting the mosaic of 19 historic topographic charts (T-sheets) from the 19th century. This large file, over 1.5gb, may be viewed with mapping coordinates in computer mapping or image processing software, or without mapping coordinates in an image-viewing software such as Adobe Photoshop. The directory also contains layer file for color enhancement display in ArcMap (.lyr), overview pyramid display file (.ovr), metadata (.txt and .xml), and the T-sheet index map (BB_TsheetIndex.jpg). 4. Directory Metadata\ - This directory contains .xml format metadata for the raster image (bb_historic_tsheets.tif.xml) and vector shapefile (BB_Historic_Features.shp.xml), a study area map, an index map for the historic topographic charts (JPG format), and a table in PDF format showing the grid codes, categories, and area (meters squared) for the digitized features. GETTING STARTED To access the information contained in this release, use computer-specific folder viewer. ACKNOWLEDGMENTS The authors acknowledge the support and time of U.S. Geological Survey volunteer, Andrew Gleim, a USF Geography student. Andy played a pivotal role in converting, re-projecting, and preparing the data for release. Many and persistent requests for these data from members of the public spurred this effort forward. Anonymous reviewers and colleagues assisted in making this effort successful. A big thank you to the support of the USGS publication group in making this revision of OFR 02-211 possible. 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., A.E. Streck, and R.P. Stumpf, 2004, Historic Topographic Sheets to Satellite Imagery: A Methodology for Evaluating Coastal Change in Florida's Big Bend Tidal Marsh, U.S. Geological Survey Open-File Report 02-211 (as revised in 2012); http://pubs.usgs.gov/of/2002/of02-211/