wbt_quinn_flow_accumulation

Calculates Quinn et al. (1995) flow accumulation.

HydrologicalAnalysis

An R frontend for the 'WhiteboxTools' library, which is an advanced geospatial data analysis platform developed by Prof. John Lindsay at the University of Guelph's Geomorphometry and Hydrogeomatics Research Group. 'WhiteboxTools' can be used to perform common geographical information systems (GIS) analysis operations, such as cost-distance analysis, distance buffering, and raster reclassification. Remote sensing and image processing tasks include image enhancement (e.g. panchromatic sharpening, contrast adjustments), image mosaicing, numerous filtering operations, simple classification (k-means), and common image transformations. 'WhiteboxTools' also contains advanced tooling for spatial hydrological analysis (e.g. flow-accumulation, watershed delineation, stream network analysis, sink removal), terrain analysis (e.g. common terrain indices such as slope, curvatures, wetness index, hillshading; hypsometric analysis; multi-scale topographic position analysis), and LiDAR data processing. Suggested citation: Lindsay (2016) <doi:10.1016/j.cageo.2016.07.003>.

Andrew Brown

whitebox

'WhiteboxTools' R Frontend

Qiusheng Wu

wbt_quinn_flow_accumulation function

<dl><dt>dem</dt>
<dd>Name of the input DEM raster file; must be depressionless.</dd>
<dt>output</dt>
<dd>Name of the output raster file.</dd>
<dt>out_type</dt>
<dd>Output type; one of 'cells', 'specific contributing area' (default), and 'catchment area'.</dd>
<dt>exponent</dt>
<dd>Optional exponent parameter; default is 1.0.</dd>
<dt>threshold</dt>
<dd>Optional convergence threshold parameter, in grid cells; default is infinity.</dd>
<dt>log</dt>
<dd>Log-transform the output values?.</dd>
<dt>clip</dt>
<dd>Optional flag to request clipping the display max by 1 percent.</dd>
<dt>wd</dt>
<dd>Changes the working directory.</dd>
<dt>verbose_mode</dt>
<dd>Sets verbose mode. If verbose mode is <code>FALSE</code>, tools will not print output messages.</dd>
<dt>compress_rasters</dt>
<dd>Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters.</dd>
<dt>command_only</dt>
<dd>Return command that would be executed by <code><a href="/link/system()?package=whitebox&version=2.3.1" data-mini-rdoc="whitebox::system()">system()</a></code> rather than running tool.</dd></dl>

Arguments

Quinn flow accumulation — wbt_quinn_flow_accumulation

<dl>

<dt>dem</dt>
<dd>Name of the input DEM raster file; must be depressionless.</dd>


<dt>output</dt>
<dd>Name of the output raster file.</dd>


<dt>out_type</dt>
<dd>Output type; one of 'cells', 'specific contributing area' (default), and 'catchment area'.</dd>


<dt>exponent</dt>
<dd>Optional exponent parameter; default is 1.0.</dd>


<dt>threshold</dt>
<dd>Optional convergence threshold parameter, in grid cells; default is infinity.</dd>


<dt>log</dt>
<dd>Log-transform the output values?.</dd>


<dt>clip</dt>
<dd>Optional flag to request clipping the display max by 1 percent.</dd>


<dt>wd</dt>
<dd>Changes the working directory.</dd>


<dt>verbose_mode</dt>
<dd>Sets verbose mode. If verbose mode is <code>FALSE</code>, tools will not print output messages.</dd>


<dt>compress_rasters</dt>
<dd>Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters.</dd>


<dt>command_only</dt>
<dd>Return command that would be executed by <code><a href='https://rdrr.io/r/base/system.html'>system()</a></code> rather than running tool.</dd>

</dl>

wbt_quinn_flow_accumulation: Quinn flow accumulation

Description

Usage

Value

Arguments