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Open-File Report 2011–1270

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## Digitized Data from Ground Geophysical Surveys in Afghanistan: A Website for Distribution of Data

#### By Sarah W. Polster and Benjamin J. Drenth

| Abstract
This document describes the process of digitization of a 1974 report on geophysical work undertaken by Soviet geophysicists in southern and eastern Afghanistan. These data, uncovered in Afghanistan, represent magnetic and electrical ground surveys for which locations are not well defined. Due to lack of location information, these surveys were georeferenced using the cities, rivers, and surrounding geology found on the maps used to plot survey locations. A geologic map found in the Soviet report contains profile lines that correspond to the geophysical maps, allowing these data to be georeferenced. The profiles correspond to sets of resistivity, chargeabiliy, and magnetic data. Some datasets were presented as graphs and needed to be gridded into a useable image. Only the vertical component of the magnetic field was collected, so conversion to total field anomaly was necessary. The magnetic data were collected in either gammas or milliorstead, both of which required conversion to standard SI units. To be useful to modern studies, the datasets and images contained in this report have been digitized, georeferenced, and in some cases converted into computer-ready formats. | First posted October 18, 2011
-  **Report** PDF (8.5 MB) 
-  **Appendix 1** PDF (9 MB) 
-  **Digital Data**  Directory includes: three vertical component magnetic anomaly grids, three total field magnetic anomaly maps, three chargeability maps, three resistivity maps, and seven databases. Refer to the metadata file for more information. 

**For additional information contact:**          Center Director,Crustal Geophysics and Geochemistry Science CenterBox 25046, Mail Stop 964Denver, CO 80225

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. |
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### Suggested citation:

Polster, S.W., and Drenth, B.J., 2011, Digitized data from ground geophysical surveys in Afghanistan: A website for distribution of data: U.S. Geological Survey Open-File Report 2011–1270, 18 p.

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### Contents

Abstract

Introduction

History of the Data

Registration of Maps

Summary

References Cited

AccessibilityFOIAPrivacyPolicies and Notices

U.S. Department of the Interior |            U.S. Geological Survey           	URL: *http://pubsdata.usgs.gov/pubs/of/2011/1270/index.html*            Page Contact Information: GS Pubs Web Contact           	Page Last Modified: Wednesday, 07-Dec-2016 23:59:37 EST