[GRASS-SVN] r59371 - grass-addons/grass7/raster/r.stream.stats
svn_grass at osgeo.org
svn_grass at osgeo.org
Wed Mar 26 08:39:13 PDT 2014
Author: madi
Date: 2014-03-26 08:39:13 -0700 (Wed, 26 Mar 2014)
New Revision: 59371
Modified:
grass-addons/grass7/raster/r.stream.stats/main.c
grass-addons/grass7/raster/r.stream.stats/r.stream.stats.html
Log:
small typo edits
Modified: grass-addons/grass7/raster/r.stream.stats/main.c
===================================================================
--- grass-addons/grass7/raster/r.stream.stats/main.c 2014-03-26 15:33:49 UTC (rev 59370)
+++ grass-addons/grass7/raster/r.stream.stats/main.c 2014-03-26 15:39:13 UTC (rev 59371)
@@ -7,11 +7,11 @@
* PURPOSE: Calculate Horton's statistics according stream network and elevation map.
* Program calculates: Bifuarcation ratio, length ratio, area ratio,
* slope ratio and drainage density
- * It uses r.stream.order stream map map, r.watershed direction map. and DEM
- * Stram input map shall contains streams ordered according Strahler's or
+ * It uses r.stream.order stream map, r.watershed direction map and DEM
+ * Stream input map shall contain streams ordered according Strahler's or
* Horton's orders. It also can calculate Hack's laws as an option.
- * If input stream comes from r.stream.exteract direction map
- * from r.stream.extract dir map must be patched with that of r.watersheed.
+ * If input stream comes from r.stream.extract direction map
+ * from r.stream.extract dir map must be patched with that of r.watershed.
*
* COPYRIGHT: (C) 2002,2010 by the GRASS Development Team
*
@@ -49,7 +49,7 @@
/* initialize module */
module = G_define_module();
module->description =
- _("Calculate Horton's statistics for Strahler and Horton ordered networks created with r.stream.");
+ _("Calculate Horton's statistics for Strahler and Horton ordered networks created with r.stream.order");
G_add_keyword(_("raster"));
G_add_keyword(_("hydrology"));
G_add_keyword("Horton's statistics");
Modified: grass-addons/grass7/raster/r.stream.stats/r.stream.stats.html
===================================================================
--- grass-addons/grass7/raster/r.stream.stats/r.stream.stats.html 2014-03-26 15:33:49 UTC (rev 59370)
+++ grass-addons/grass7/raster/r.stream.stats/r.stream.stats.html 2014-03-26 15:39:13 UTC (rev 59371)
@@ -2,21 +2,21 @@
<dl>
<dt><b>-c</b></dt>
<dd>Print only catchment's characteristics. Useful for shell script calculation
-or collecting data in external tables</dd>
+or collecting data in external tables.</dd>
<dt><b>-o</b></dt>
-<dd>Print only parameters for every order. Usefull to visualise Horton's law with
-external software (see example)</dd>
+<dd>Print only parameters for every order. Useful to visualise Horton's law with
+external software (see example).</dd>
<dt><b>-m</b></dt>
<dd>Only for very large data sets. Use segment library to optimise memory
-consumption during analysis</dd>
+consumption during analysis.</dd>
<dt><b>stream</b></dt>
<dd>Stream network: name of input stream map on which ordering will be performed
produced by r.watershed or r.stream.extract. Because streams network produced by
-r.watershed and r.stream.extract may slighty differ in detail it is required to
+r.watershed and r.stream.extract may slighty differ in detail, it is required to
use both stream and direction map produced by the same module. Stream background
shall have NULL value or zero value. Background values of NULL are by default
produced by r.watershed and r.stream.extract. If not 0 or NULL use <a
-href="r.mapcalc.html">r.mapcalc</a> to set background values to null.
+href="r.mapcalc.html">r.mapcalc</a> to set background values to NULL.
</dd>
<dt><b>dir</b></dt>
<dd>Flow direction: name of input direction map produced by r.watershed or
@@ -24,10 +24,10 @@
values in places where streams occur. NULL (nodata) cells are ignored, zero and
negative values are valid direction data if they vary from -8 to 8 (CCW from
East in steps of 45 degrees). Direction map shall be of type CELL values. Region
-resolution and map resoultion must be the same.
+resolution and map resolution must be the same.
Also <em>stream</em> network map must have the same resolution. It is checked by
default. If resolutions differ the module informs about it and stops. Region
-boundary and maps boundary may be differ but it may lead to unexpected
+boundary and maps boundary may differ but it may lead to unexpected
results.</dd>
<dt><b>elevation</b></dt>
@@ -46,43 +46,43 @@
<h2>DESCRIPTION</h2>
<p>
-Module r.stream.stats is prepared to calculate Hotron's statistics of drainage
+The module r.stream.stats is prepared to calculate Horton's statistics of drainage
network.
<p>
-These statistics are calculated according formulas given by R.Horton (1945).
-Because Horton do not defined precisely what is stream slope, it has been
-proposed proposed 2 different approaches: first (slope) use cell-by-cell slope
-calculation, second (gradient) use difference between elevation of outlet and
+These statistics are calculated according to formulas given by R.Horton (1945).
+Because Horton do not defined precisely what is stream slope, 2 different approaches
+have been proposed: the first (slope) uses cell-by-cell slope
+calculation; the second (gradient) uses the difference between elevation of outlet and
source of every channel to its length to calculate formula. Bifurcation ratio
-for every order is calculated acording formula:
+for every order is calculated acording to the formula:
<code>n_streams[1]/n_stream[i+1]</code>
-where i the current order and i+1 next higher order. For max order of the map
+where i is the current order and i+1 is the next higher order. For max order of the map
number of streams is zero. Rest of the ratios are calculated in similar mode.
The bifurcation and other ratios for the whole catchment (map) is calculated as
-mean i.e sum of all bifurcation ratio / max_order-1 (for max_order stream
-bifurcation ratio = 0)
-It is strongly recommended to extract stream network using basin map created
-with r.stream.basin. If whole stream order map is used the calculation will be
+mean i.e. sum of all bifurcation ratio / max_order-1 (for max_order stream
+bifurcation ratio = 0).
+It is strongly recommended to extract the stream network using basin map created
+with r.stream.basins. If the whole stream order map is used, the calculation will be
performed but results may not have hydrological sense.
-For every order (std) means that statstic is calculated with standard deviation:
+For every order (std) means that statistics are calculated with standard deviation:
<ul>
<li>number of streams
-<li>total length of streams of given order
-<li>total area of basins of given order
+<li>total length of streams of a given order
+<li>total area of basins of a given order
<li>drainage density
<li>stream density
-<li>average length of streams of given order (std)
-<li>average slope (cell by cell inclination) of streams of given order (std)
-<li>average gradient (spring to outlet inclination ) of streams of given order
+<li>average length of streams of a given order (std)
+<li>average slope (cell by cell inclination) of streams of a given order (std)
+<li>average gradient (spring to outlet inclination) of streams of a given order
(std)
-<li>average area of basins of given order (std)
-<li>avarage elevation difference of given order (std)
+<li>average area of basins of a given order (std)
+<li>avarage elevation difference of a given order (std)
<p>ratios:
<li>bifuracation ratio
<li>length ratio
-<li>sloope and gradient ratios
+<li>slope and gradient ratios
<li>area ratio
</ul>
for the whole basin:
@@ -100,7 +100,7 @@
</ul>
<p>
For the whole basins ratios are calculated acording two formulas: as a mean of
-ratios for every order, or as a antilog of slope coeficient of the regression
+ratios for every order, or as a antilog of slope coefficient of the regression
model: order vs. log10(parameter)
<h2>NOTES</h2>
@@ -111,7 +111,7 @@
mapcalc formula:
<p>
-<code>echo 'sel_streams=if(basin==xxx,streams,null())'|r.mapcalc #xxx category
+<code>echo 'sel_streams=if(basin==xxx,streams,null())' | r.mapcalc #xxx category
of desired basin</code>
<p>
@@ -119,15 +119,15 @@
has no hydrological sense. Hack (or Gravelius hierarchy) main stream is not the
same what so called Horton's reverse ordering (see: Horton 1945).
<p>
-Module can work only if direction map, stream map and region map has same
+The module can work only if direction map, stream map and region map have the same
settings. It is also required that stream map and direction map come from the
same source. For lots of reason this limitation probably cannot be omitted.
-this means if stream map comes from r.stream.extract also direction map from
-r.stream.extract must be used. If stream network was generated with MFD method
+This means that if stream map comes from r.stream.extract also direction map from
+r.stream.extract must be used. If the stream network was generated with MFD method
also MFD direction map must be used.
<h2>EXAMPLE</h2>
-Create table with order statistics. This table can easily send to external
+Create table with order statistics. This table can easily be sent to external
program (like R) to be visualised:
<div class="code"><pre>
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