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Open-File Report 03–226

In Cooperation with the Edwards Aquifer Authority

Helicopter Electromagnetic and Magnetic Survey Data and Maps, Seco Creek Area, Medina and Uvalde Counties, Texas

By Bruce D. Smith, David V. Smith, Patricia L. Hill, and Victor F. Labson

thumbnail image of geology flight lines
Version 1.1

A helicopter electromagnetic and magnetic (HEM) survey was completed of a 209 square kilometer (81 square miles) area of the central Edwards aquifer. This open-file report is a release of the airborne geophysical data and a summary of the hydrologic application.

Part or all of this report is presented here in Portable Document Format. The latest version of Adobe Acrobat Reader or similar software is required to view it. If you wish to download the latest version of Acrobat Reader free of charge, click here .
For viewing and printing.
(This version of the report is accessible as defined in Section 508.)
For viewing and printing.
(This version of the report is accessible as defined in Section 508.)

Digital Data

  
Contents TXT file (4.KB)
 Listing of subdirectories and files.
HP-Plots Directory
 The files contained in this subdirectory are plot files suitable for a large format Hewlett Packard Printer such as a 755cm.
LineData Directory
 Flight line data given in an ASCII database.
Reports Directory
 Contractors report of each channel description.
Grids Directory
 Grids of the magnetic field data and the apparent resistivities for the horizontal coplanar coil pairs.
MapImages Directory
 Contains geotiff (UTM projected tif files) of the grids.
AccessibilityFOIAPrivacyPolicies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: <http://pubs.usgs.gov/of/2003/ofr-03-226/>
Questions or Assistance: GS Pubs Web Contact
Page Last Modified: Wed Jun 8 16:30 EST 2005

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