<br><font size=2 face="sans-serif">Hi,</font>
<br><font size=2 face="sans-serif">I tried gdal_merge.py but I got a memory
Error because I use the -n nodata value option. Several threads sugest
that I must use gdalwrap instead.</font>
<br><font size=2 face="sans-serif">This behavior of gdal_merge.py is very
important to me in this particular case</font>
<br><font size=2 face="sans-serif">"</font><font size=1 face="Verdana">In
areas of overlap, the last image will be copied over earlier ones</font><font size=2 face="sans-serif">".</font>
<br>
<br><font size=2 face="sans-serif">Does gdalwrap has the same behavior?
(I ask because it is difficult to test and validate with my data)?</font>
<br>
<br><font size=2 face="sans-serif">Also, the doc says "</font><font size=1 face="Verdana">Mosaicing
into an existing output file is supported if the output file already exists.</font><font size=2 face="sans-serif">"
</font>
<br><font size=2 face="sans-serif">But how? What is the option to append
data? When launching a command for another image it says that I must delete
the output file.</font>
<br>
<br><font size=2 face="sans-serif">I would appreciate if someone could
validate if this </font>
<br><font size=2 face="sans-serif">gdalwarp -srcnodata -3.4028234663852886e+38
-dstnodata -3.4028234663852886e+38 -of "GTiff" EstRN.img icu.tif</font>
<br>
<br><font size=2 face="sans-serif">is the equivalent of this </font>
<br><tt><font size=2>gdal_merge.py -n -3.4028234663852886e+38 -o </font></tt><font size=2 face="sans-serif">icu.tif</font><tt><font size=2>
-of "GTiff" EstRN.img EstSh.img</font></tt>
<br>
<br><tt><font size=2>It works but maybe some more parameters are important.
</font></tt>
<br>
<br><tt><font size=2>Thanks for your help,</font></tt>
<br><tt><font size=2>Steve</font></tt>
<br>
<br>
<br><font size=2 face="sans-serif"><br>
</font><font size=3 color=#0066ff><i>Steve Toutant, M. Sc.</i></font><font size=3><br>
Analyste en géomatique<br>
Secteur environnement<br>
Direction des risques biologiques, environnementaux et occupationnels<br>
Institut national de santé publique du Québec<br>
945, avenue Wolfe<br>
Québec, Qc G1V 5B3 </font>
<p><font size=3>Tél.: (418) 650-5115 #5281<br>
Fax.: (418) 654-3144</font><font size=3 color=blue><u><br>
</u></font><a href=mailto:steve.toutant@inspq.qc.ca><font size=3 color=blue><u>steve.toutant@inspq.qc.ca</u></font></a><font size=3 color=blue><u><br>
</u></font><a href=http://www.inspq.qc.ca/><font size=3 color=blue><u>http://www.inspq.qc.ca</u></font></a>
<p><font size=3> </font>
<p>