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<title>ReadAsArray()</title>
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<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'>I got it.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'>Thanks<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'>Shawn<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
gdal-dev-bounces@lists.maptools.org
[mailto:gdal-dev-bounces@lists.maptools.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b><st1:PersonName w:st="on">Gong, Shawn</st1:PersonName>
(Contractor)<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, March 19, 2007 11:02
AM<br>
<b><span style='font-weight:bold'>To:</span></b> gdal-dev@lists.maptools.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Gdal-dev] ReadAsArray()</span></font><span
lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>Hi</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>list,</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>I have questions regarding</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>ReadAsArray()</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>Here is the code:</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'> </span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>msi_array =</span></font><span lang=EN-US> </span><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>gdal_dataset.ReadAsArray().astype(Numeric.Float32)</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>Q1: what</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>is msi_array? </span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>Is it a Numeric array?</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>Q2: printing out</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>“print</span></font><span lang=EN-US> </span><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>msi_array”
generates a</span></font><span lang=EN-US> </span><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>three-dimensional
array</span></font><span lang=EN-US> </span><font size=2 face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>(or</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>list?)</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>[ [ [0 1 2 up to col]</span></font><span lang=EN-US>
</span><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>...</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>... up to row]</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>... up to bands]</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>What</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>function to call if I</span></font><span lang=EN-US> </span><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>want to get a number of subarrays like:</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
</span></font><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>R</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>=</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>#1</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>band</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>and</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>100x50</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>pixels</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
</span></font><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>G =</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>#2</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>band</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>and</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>100x50</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>pixels</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>I have used</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'> r = msi_array[0:row][0:col][int(r_band)-1]</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'> g =
msi_array[0:row][0:col][int(g_band)-1]</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>b = msi_array[0:row][0:col][int(b_band)-1]</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;
font-family:"Courier New"'>but it did not for the cases</span></font><span
lang=EN-US> </span><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New"'>when row > col, what I
got is</span></font><span lang=EN-US> </span><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=IT style='font-size:10.0pt;
font-family:"Courier New"'>r = msi_array[0:col][0:col], etc.</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=IT style='font-size:10.0pt;
font-family:"Courier New"'>Thanks,</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=IT style='font-size:10.0pt;
font-family:"Courier New"'>Shawn</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=IT style='font-size:10.0pt;
font-family:"Courier New"'>
</span></font><o:p></o:p></p>
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