Filters: Tags: Southwestern United States (X) > Extensions: Shapefile (X)

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Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011 This study uses growth in vegetation during the monsoon season measured from LANDSAT imagery as a proxy for measured rainfall. NDVI values from 26 years of pre- and post-monsoon season Landsat imagery were derived across Yuma Proving Ground (YPG) in southwestern Arizona, USA. The LANDSAT imagery (1986-2011) was downloaded from USGS’s GlobeVis website (http://glovis.usgs.gov/). Change in NDVI was calculated within a set of 2,843 Riparian Area Polygons (RAPs) up to 1 km in length defined in ESRI ArcMap 10.2. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arizona, Landsat TM, NDVI, Normalized Difference Vegetation Index, Sonoran Desert, All tags... Southwestern United States, USGS Science Data Catalog (SDC), Yuma Proving Ground, biota, climatologyMeteorologyAtmosphere, ephemeral stream channels, monsoon season, Fewer tags USGS Southwest Repeat Photography Collection: Kanab Creek, southern Utah and northern Arizona, 1872-2010 The USGS Southwest Repeat Photography Collection (‘Collection’), formerly named the Desert Laboratory Repeat Photography Collection, is now housed by the Southwest Biological Science Center (SBSC) in Flagstaff, Arizona. It contains images from the late 1800s to mid-2000s, and was assembled over decades by now retired USGS scientists Drs. Robert H. Webb and Raymond M. Turner. There are 80 camera points, or stakes, along Kanab Creek in the Collection, with images and fields notes taken between 1872 and 2010 (a 138-year span). About one-fourth of the Kanab Creek film had been previously digitized, but none of the associated materials, including field notes, were digitized. The goal of the Fiscal Year (FY) 2016 Kanab... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Albion camera, Colorado River, Dallmeyer lenses, Kanab Creek, Southwestern United States, All tags... Stanton expedition, camera station, climate change, deserts, ecosystem change, geomorphology, historic photographs, land surface characteristics, landscape change, negatives, northern Arizona, orthochromatic film, repeat photography, southern Utah, transparencies, vegetation, wetland ecosystems, wetlands, Fewer tags