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Fodar Orthomosaic of the Totatlanika River Corridor (Alaska) Acquired August 2021 This dataset provides an orthorectified aerial photo mosaic derived from airborne fodar data acquired in 2021 on August 31 over the Totatlanika River in central Alaska. The term “fodar” is a portmanteau of foto and lidar, coined by Matt Nolan, which describes a method of quantifying the color and elevation of Earth’s surface via airborne small-format digital camera photography. Categories: Data, Image; Tags: Alaska, Alaska Range, Buzzard Creek, California Creek, DIGITAL ELEVATION/TERRAIN MODEL (DEM), All tags... Data, FAULTS, Geomorphology, Geospatial Datasets, Image, Land surface characteristics, MOUNTAINS, OROGENIC MOVEMENT, TECTONIC UPLIFT, Tectonic processes, Topography, Totatlanika River, USGS:ASC416, completed, elevation, geoscientificInformation, Fewer tags Mount Baker Electromagnetic and Magnetic Data Hydrothermally altered rocks, particularly if water saturated, can weaken stratovolcanoes, thereby increasing the potential for catastrophic sector collapses that can lead to far-traveled, destructive debris flows, which are the largest volcanic hazards for Mount Adams and Mount Baker. Evaluating the hazards associated with such alteration is difficult because much of the alteration is obscured by ice and its depth extent is unknown. Intense hydrothermal alteration significantly reduces the resistivity and magnetization of volcanic rock and therefore hydrothermally altered rocks are identified with helicopter electromagnetic and magnetic measurements at Mount Baker and Mount Adams. High resolution magnetic and electromagnetic... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CGGSC, Crustal Geophysics and Geochemistry Science Center, Fugro Airborne Surveys, Mount Baker, Washington, All tags... aeromagnetic surveying, electromagnetic surveying, geophysics, geospatial datasets, magnetic surveying, mountains, resistivity, Fewer tags