L. C. Rowan C. M. Trautwein 1987 <p>Linear structural features and hydrothermally altered rocks that were interpreted from Landsat data have been used by the U.S. Geological Survey (USGS) in regional mineral resource appraisals for more than a decade. In the past, linear features and alterations have been incorporated into models for assessing mineral resources potential by manually overlaying these and other data sets. Recently, USGS research into computer-based geographic information systems (GIS) for mineral resources assessment programs has produced several new techniques for data analysis, quantification, and integration to meet assessment objectives.</p> application/pdf en American Society of Photogrammetry New techniques for the quantification and modeling of remotely sensed alteration and linear features in mineral resource assessment studies article