David Fitterman Maria Deszcz-Pan 2002 report USGS Open-File Report 02-101 Denver, CO U.S. Geological Survey http://sofia.usgs.gov/publications/ofr/02-101/data.html These helicopter electromagnetic data were flown over a portion of Everglades National Park and surrounding areas in south Florida 9-14 December 1994. Two versions of the data are provided: the original dataset and the corrected dataset. This project addressed the question of determining the location of the fresh-water/salt-water interface (FWSWI) in the coastal regions of southern Miami-Dade and Monroe counties, synoptic monitoring of changes in water quality associated with changes in water management practices, and looking for geophysical evidence of subsurface discharges to Florida Bay. This project provided basic information needed to create ground-water models and test various restoration strategies and their impact on ground-water quality. 19941209 29941214 ground condition Complete None planned -81.125 -80.375 25.6 25.125 none helicopter electromagnetic data hydrology mapping helicopter electromagnetic data ISO 19115 Topic Category environment inlandWaters imageryBaseMapsEarthCover 007 012 011 Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, DC, National Institute of Standards and Technology United States US U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, DC, NIST Florida FL Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology Miami-Dade County Monroe County USGS Geographic Names Information System Everglades National Park none Central Everglades none none David Fitterman U.S. Geological Survey Project Chief mailing address

P. O. Box 25046 Denver Federal Center MS 964

Denver CO 80225 USA 303 236-1382 303 236-1425 fitter@usgs.gov http://sofia.usgs.gov/publications/ofr/02-101/diglocmapx.gif area covered by the Dighem helicopter electromagnetic survey GIF The U.S. Geological Survey contracted with Dighem, then a division of CGG Canada, Ltd, of Mississauga, Ontario, Canada, to fly a helicopter electromagnetic survey over parts of Everglades National Park and surrounding areas of south Florida. ASCII text files Fitterman, David V. Deszcz-Pan, Maria; Stoddard, Carl E. 1999 report USGS Open-File Report 99-426 Reston, VA U.S. Geological Survey http://sofia.usgs.gov/publications/ofr/99-426/ Deszcz-Pan, M. Fitterman, D. V., Lason, V. F. 1998 report Exploration Geophysics v. 29 Tulsa, OK Society of Exploration Geophysicists During the interpretation of the datset provided by Dighem, errors in the data became apparent which caused difficulties in obtaining reliable layered-earth inversion models. These errors were traced to problems with calibration and with the bird tow-cable length. Calibration errors were corrected using a procedure described in Deszcz-Pan et al, 1998. unknown During 9-14 December 1994 a helicopter electromagnetic survey was flown by Dighem, Mississauga, Ontario, Canada, over parts of Everglades National Park and surrounding areas in south Florida. The survey covered 398 square miles (1031 sq. Km) with flightlines totaling 1718 miles (2765 km). The data were collected towards the end of the wet season. 1994 David Fitterman U.S. Geological Survey Project Chief mailing address

P. O. Box 25046 Denver Federal Center MS 964

Denver CO 80225 USA 303 236-1382 303 236-1425 fitter@usgs.gov Errors discovered in the original data due to problems with calibration and with the bird tow-cable length were corrected. See the section "Additional Corrections Applied to Original Data Set" in Fitterman David V. And Deszcz-Pan, Maria, 2002, Helicopter Electromagnetic Data from Everglades National park and Surrounding Areas, Florida: Collected 9-14, December, 1994, OFR 02-101 for more information on the correction procedures. Unknown Maria Deszcz-Pan U.S. Geological Survey mailing address

Box 25046 Denver Federal Center, MS 964

Denver CO 80225-0046 USA 303 236-1317 maryla@usgs.gov Everglades National Park Universal Transverse Mercator 17 0.9996 -81 0 500000 0 Coordinate Pair 0.1 0.1 meters North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 For a description of the channels in the original dataset see Table 3 (http://sofia.usgs.gov/publications/ofr/02-101/table3.html. For a description of the channels in the corrected dataset see Table 4 (http://sofia.usgs.gov/publications/ofr/02-101/table4.html) USGS personnel Heather S.Henkel U.S. Geological Survey mailing address

600 Fourth St. South

St. Petersburg FL 33701 USA 727 803-8747 ext 3028 727 803-2030 hhenkel@usgs.gov helicopter electromagnetic data The data have no guarantees explicit or implied ASCII There are two versions of the dataset. The original dataset and a corrected dataset http://sofia.usgs.gov/publications/ofr/02-101/data.html Data may be downloaded from the SOFIA website none 20070525 Heather Henkel U.S. Geological Survey mailing and physical address

600 Fourth Street South

St. Petersburg FL 33701 USA 727 803-8747 ext 3028 727 803-2030 sofia-metadata@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998