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Water classification of the Colorado River Corridor, Grand Canyon, Arizona, 2013—Data

Water classification within in the Grand Canyon riparian corridor derived from 2013 airborne image collection


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Durning, L.E., Sankey, J.B., Chain, G.R., and Sankey, T.T., 2017, Water classification of the Colorado River Corridor, Grand Canyon, Arizona, 2013—Data: U.S. Geological Survey data release,


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 ground truth. When developing [...]


Point of Contact :
Joel Sankey
Originator :
Laura E. Durning, Geoff R. Chain, Joel B. Sankey, Temuulen T. Sankey
Metadata Contact :
Terry Arundel
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
SDC Data Owner :
Southwest Biological Science Center

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These data are intended to be useful for management, monitoring, and research of the Colorado River ecosystem downstream of Glen Canyon Dam. Because the flows from Glen Canyon Dam were maintained at approximately 227 m3/s during the multispectral image acquisition on which these data are based, the extracted water pixels effectively represent the area inundated by river flows up to this discharge throughout the river corridor in Grand Canyon. A similar water classification has been produced previously for several other image data years (2002, 2005 and 2009) and can be used for analysis of spatiotemporal environmental changes. These data are also useful to mask (remove) all pixels with water from image scenes for further image analysis and classification.


The authors of these data request that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.

Additional Information


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DOI doi:10.5066/F7PZ5799

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