This Folder:  radar\
This File:    read_4th.txt


Report Title:     Aeromagnetic Surveying in Wisconsin 1998-99:
                     Digital Data Files
Report Authors:   Robert E. Bracken and Suzanne W. Nicholson
Report Document:  U.S. Geological Survey Open-File Report 99-527



Description of This Folder and Its Content:

This folder contains a gridded data set of the aircraft's radar
altimeter data as supplied by the contractor.  The grid interval
is 200 meters and the grid size is 1963 columns by 1894 rows.
Only the Geosoft Grid Exchange Format (.gxf) is included.  This
folder is designated by the following path:

\data\grid\radar\


In this folder, you will find the following files:


gxf_hdr.txt  A copy of the header information provided in the
             wiscrdr.gxf grid file.  This header includes all of
             the essential grid and projection information in a
             directly readable form.

read_4th.    (This file.)  Contains information describing this
             folder and its contents.

wiscrdr.gxf  A Geosoft GXF (Grid Exchange Format) Grid (Geosoft,
             1998).  This is an entirely ASCII grid with
             80-character or less record lengths.  The no-data
             value is -999999.0