Skip Links

USGS - science for a changing world
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 of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.
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.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/of/2003/ofr-03-226/
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Saturday, January 12, 2013, 11:14:03 PM