[GRASS-SVN] r43731 - grass-addons/imagery/i.landsat.acca
svn_grass at osgeo.org
svn_grass at osgeo.org
Wed Sep 29 22:02:28 EDT 2010
Author: hamish
Date: 2010-09-30 02:02:28 +0000 (Thu, 30 Sep 2010)
New Revision: 43731
Modified:
grass-addons/imagery/i.landsat.acca/description.html
Log:
slight adjustments to the english, svn props
Modified: grass-addons/imagery/i.landsat.acca/description.html
===================================================================
--- grass-addons/imagery/i.landsat.acca/description.html 2010-09-30 02:00:35 UTC (rev 43730)
+++ grass-addons/imagery/i.landsat.acca/description.html 2010-09-30 02:02:28 UTC (rev 43731)
@@ -2,24 +2,29 @@
<EM>i.landsat.acca</EM> implements the Automated Cloud-Cover Assessment
(ACCA) Algorithm from Irish (2000) with the constant values for pass filter
-one from Irish et al. (2006). To do this, it needs the band numbers 2, 3,
+one from Irish et al. (2006). To do this, it needs Landsat band numbers 2, 3,
4, 5, and 6 (or band 61 for Landsat-7 ETM+) which have already been
processed from DN into reflectance and band-6 temperature (for example with
<em>i.landsat.toar</em>).
-<p>The ACCA gives good results over most of the planet with the exception of
+<p>
+The ACCA algorithm gives good results over most of the planet with the exception of
ice sheets because ACCA operates on the premise that clouds are colder than
-the land surface they cover. The algorithm was designed to Landsat-7 ETM+
-but because of they use reflectances it usefull also for Landsat-4/5 TM.
+the land surface they cover. The algorithm was designed for Landsat-7 ETM+
+but because reflectance is used it is also useful for Landsat-4/5 TM.
+
<H2>NOTES</H2>
<em>i.landsat.acca</em> works in the current region settings.
+
<H2>EXAMPLES</H2>
-To run the standard ACCA algorithm with and filling cloud holes (the <b>-f</b> flag):
+Run the standard ACCA algorithm with filling of small cloud holes (the <b>-f</b> flag):
<p>
+<!-- maybe include i.landsat.toar step as well here to reinforce the point? -->
+
With per-band reflectance raster maps named <tt>226_62.toar.1,
226_62.toar.2, </tt> [...] and LANDSAT-7 thermal band <tt>226_62.toar.61</tt>,
outputing to a new raster map named <tt>226_62.acca</tt>:
@@ -58,4 +63,4 @@
University of León, Spain<BR>
<p>
-<i>Last changed: $Date: 2010/09/29 00:00:00 $</i>
+<i>Last changed: $Date$</i>
Property changes on: grass-addons/imagery/i.landsat.acca/description.html
___________________________________________________________________
Added: svn:mime-type
+ text/html
Added: svn:keywords
+ Author Date Id
Added: svn:eol-style
+ native
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