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These data are aerial image-derived, classification maps of tamarisk (Tamarisk spp.) in the riparian zone of the Colorado River from Glen Canyon Dam to Separation Canyon, a total river distance of 412 km. The classification maps are published in GIS vector format. Two maps are published: 1) a classification of tamarisk from a 0.2 m resolution multispectral image dataset acquired in May 2009 (Tamarisk Classification 2009), and 2) a classification of tamarisk impacted by the tamarisk beetle (Diorhabda carinulata) from a 0.2 m resolution multispectral image dataset acquired in May 2013 (Beetle Impact Classification 2013). Tamarisk presence in 2009 was classified using the Mahalanobis Distance method with a total of...
Tags: Arizona,
Change Detection,
Classification maps,
Colorado River,
GIS vector format data, All tags...
Glen Canyon,
Glen Canyon Dam,
Grand Canyon,
NDVI,
Normalized difference vegetation index,
Remote Sensing,
Riparian vegetation,
Riparian zone,
Separation Canyon,
Tamarisk,
Tamarisk Beetle,
USGS Science Data Catalog (SDC), Fewer tags
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These data are classified maps of water in the Colorado River at a discharge of approximately 227 meters squared/second in Grand Canyon from Glen Canyon Dam to Pearce Ferry in Arizona. The data are derived from interpretation of multispectral high resolution airborne imagery that was acquired in May 2013. The water classification data have the same 0.2-meter ground resolution as the imagery. These data have not undergone a statistical accuracy assessment, but they are based on methods that included image interpretation to exhaustively identify water which have been shown to produce very high classification accuracies and excellent correlation between maps of total vegetation produced by independent analysts and...
Types: Citation;
Tags: Arizona,
Bright Angel Creek,
Colorado River,
Diamond Creek,
Glen Canyon, All tags...
Glen Canyon Dam,
Grand Canyon,
Grand Canyon,
Havasu Creek,
Kanab Creek,
Lake Mead,
Lake Powell,
Lees Ferry,
Little Colorado River,
Marble Canyon,
Page,
Paria River,
Peach Springs,
Pearce Ferry,
Shinumo Creek,
Tapeats Creek,
USGS Science Data Catalog (SDC),
United States,
airborne imagery,
airborne multispectral high resolution data,
controlled flooding,
desert ecosystems,
digital aerial imagery, Fewer tags
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In May 2013, the Grand Canyon Monitoring and Research Center (GCMRC) of the U.S. Geological Survey’s (USGS) Southwest Biological Science Center (SBSC) acquired airborne multispectral high resolution data for the Colorado River in Grand Canyon in Arizona, USA. The imagery data consist of four bands (blue, green, red and near infrared) with a ground resolution of 20 centimeters (cm). These data are available to the public as 16-bit geotiff files. They are projected in the State Plane (SP) map projection using the central Arizona zone (202) and the North American Datum of 1983 (NAD83). The assessed accuracy for these data is based on 91 Ground Control Points (GCPs), and is reported at 95% confidence as 0.64 meters...
Types: Citation;
Tags: Airborne imagery,
Airborne multispectral high resolution data,
Arizona,
Bright Angel Creek,
Colorado River, All tags...
Diamond Creek,
Digital Aerial Imagery,
Four band image mosaic,
GeoTIFF,
Glen Canyon Dam,
Grand Canyon,
Havasu Creek,
Kanab Creek,
Lake Mead,
Lake Powell,
Lees Ferry,
Leica ADS80/82,
Little Colorado River,
Marble Canyon,
Natural Color,
Near Infrared,
Orthoimagery,
Page,
Paria River,
Peach Springs,
Pearce Ferry,
Shinumo Creek,
Tapeats Creek,
USGS Science Data Catalog (SDC),
United States, Fewer tags
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These data are classification maps of total riparian vegetation along the Colorado River in Grand Canyon from Glen Canyon Dam to Pearce Ferry in Arizona. The data are derived from interpretation of multispectral high resolution airborne imagery that was acquired in May 2013. The total vegetation data have the same 0.2-meter ground resolution as the imagery. These data have not undergone a statistical accuracy assessment, but they are based on methods that included image interpretation to exhaustively identify total vegetation which have been shown to produce very high classification accuracies and excellent correlation between maps of total vegetation produced by independent analysts and ground truth. The data represent...
Types: Citation;
Tags: Arizona,
Bright Angel Creek,
Colorado River,
Diamond Creek,
Glen Canyon, All tags...
Glen Canyon Dam,
Grand Canyon,
Grand Canyon,
Havasu Creek,
Kanab Creek,
Lake Mead,
Lake Powell,
Lees Ferry,
Little Colorado River,
Marble Canyon,
Page,
Paria River,
Peach Springs,
Pearce Ferry,
Shinumo Creek,
Tapeats Creek,
USGS Science Data Catalog (SDC),
United States,
airborne imagery,
airborne multispectral high resolution data,
desert ecosystems,
digital aerial imagery,
land cover,
riparian vegetation,
vegetation,
wetland ecosystems,
wetlands, Fewer tags
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