This Folder: grid\ This File: read_3rd.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 the final leveled magnetic data and the radar altitude data in gridded form as supplied by the contractor. The magnetic grids have been translated to various formats. It is designated by the following path: \data\grid\ In this folder, you will find the following sub-folders and files: mag\ Contains a gridded data set of the final leveled magnetic data as supplied by the contractor. The grid interval is 200 meters. Various grid formats are included. radar\ Contains a gridded data set of the aircraft's radar altimeter data as supplied by the contractor. The grid interval is 200 meters. Only the Geosoft Grid Exchange Format (.gxf) is included. info_e00. A summary description of the .e00 grid format. An e00 grid is in the mag\ folder. info_gxf. A description of the .gxf grid exchange format. Grids of this type are found in both mag\ and radar\ folders. read_3rd. (This file.) Contains information describing this folder and its contents.