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41 lines
2.0 KiB
HTML
41 lines
2.0 KiB
HTML
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<html>
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<head><link rel="stylesheet" type="text/css" href="help.css"/></head>
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<body>
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<h1 class='module'>Slope Average Down</h1>
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<div class='author'>(c) 2010 by David G. Tarboton</div>
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<div class='description'>This tool computes slope in a D8 downslope direction
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averaged over a user selected distance. Distance should be specified in
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horizontal map units.</div>
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<h2>Parameters</h2>
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<dl class='parameters'>
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<dt>Number of Processes <div class='type'>Integer</div></dt>
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<dd>The number of stripes that the domain will be divided into and the
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number of MPI parallel processes that will be spawned to evaluate each
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of the stripes.</dd>
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<dt>D8 Flow Direction Grid <div class='type'>Raster Grid</div></dt>
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<dd>This input is a grid of flow directions that are encoded using the
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D8 method where all flow from a cells goes to a single neighboring cell
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in the direction of steepest descent.This grid can be obtained as the
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output of the "D8 Flow Directions" tool.</dd>
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<dt>Pit Filled Elevation Grid <div class='type'>Raster Grid</div></dt>
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<dd>This input is a grid of elevation values. As a general rule, it is
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recommended that you use a grid of elevation values that have had the
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pits removed for this input. Pits are generally taken to be artifacts
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that interfere with the analysis of flow across them. This grid can be
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obtained as the output of the "Pit Remove" tool, in which case
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it contains elevation values where the pits have been filled to the
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point where they just drain.</dd>
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<dt>Downslope Distance <div class='type'>Double</div></dt>
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<dd>Input parameter of downslope distance over which to calculate the
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slope (in horizontal map units). Default <strong>50</strong>.</dd>
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</dl>
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<h2>Outputs</h2>
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<dl class='parameters'>
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<dt>Slope Average Down Grid <div class='type'>Raster Grid</div></dt>
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<dd>This output is a grid of slopes calculated in the D8 downslope
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direction, averaged over the selected distance.</dd>
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</dl>
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</body></html>
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