[GRASS-SVN] r44852 - grass-promo/tutorials/grass_modis

[svn_grass at osgeo.org]

Author: ychemin
Date: 2011-01-03 19:57:53 -0800 (Mon, 03 Jan 2011)
New Revision: 44852

Modified:
   grass-promo/tutorials/grass_modis/article_GIPE.tex
   grass-promo/tutorials/grass_modis/i_modis_qc.png
Log:
updated i.modis.qc section

Modified: grass-promo/tutorials/grass_modis/article_GIPE.tex
===================================================================
--- grass-promo/tutorials/grass_modis/article_GIPE.tex	2011-01-04 03:57:04 UTC (rev 44851)
+++ grass-promo/tutorials/grass_modis/article_GIPE.tex	2011-01-04 03:57:53 UTC (rev 44852)
@@ -105,12 +105,41 @@
 \end{smallverbatim}
 
 \section{QA Flags screening}
-Use the \textit{i.modis.qc} module.
+Use the \textit{i.modis.qc} module with MODIS Vegetation products (i.e. MOD13A2) as shown in the screenshot below:
+\begin{smallverbatim}
+MOD13A2: Mandatory QA Flags 1Km bits[0-1]
+* [00]= class 0: VI produced, good quality
+* [01]= class 1: VI produced, but check other QA
+* [10]= class 2: Pixel produced, but most probably cloud
+* [11]= class 3: Pixel not produced due to other \
+    reasons than clouds
+\end{smallverbatim}
 
 \begin{center}
  \includegraphics[scale=0.45]{i_modis_qc.png}
 \end{center}
 
+If you want to use shell scripting, the example below shows how to process Quality Assessment for Land Surface Temperature (i.e. MOD11A1):
+\begin{smallverbatim}
+
+MOD11A1: Mandatory QA Flags bits=[0-1]
+* [00]= class 0: LST produced, good quality, \
+    not necessary to examine more detailed QA
+* [01]= class 1: LST produced, other quality, \
+    recommend examination of more detailed QA
+* [10]= class 2: LST not produced due to cloud effects
+* [11]= class 3: LST not produced primarily due \
+    to reasons other than cloud
+
+for QC in mandatory_qa_11A1 data_quality_flag_11A1 \
+ emis_error_11A1 lst_error_11A1
+ do
+ i.modis.qc productname=mod11A1 qcname=$QC \
+ input=mod11A1.QC out=mod11A1_$QC
+done
+\end{smallverbatim}
+
+
 \address{GRASS Development Team\\
   \url{http://grass.osgeo.org}\\
   \email{tmitchell at osgeo.org}}

Modified: grass-promo/tutorials/grass_modis/i_modis_qc.png
===================================================================
(Binary files differ)