<div dir="auto"><div>I wrote the original jpipkak driver years ago and it a driver I would suggest for deprecation but I am no longer involved in j2k development to know how much it is being used.<div dir="auto"><br></div><div dir="auto">You will need a jpip server to use the jpip client. Wavelets are different to cogs and you will get the benefits of progressive display.</div><div dir="auto"><br></div><div dir="auto">Norman</div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Aug 26, 2022, 5:12 PM Kurt Schwehr <<a href="mailto:schwehr@gmail.com">schwehr@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">It costs, but you could try this:<div dir="auto"><br></div><div dir="auto"><a href="https://gdal.org/drivers/raster/jpipkak.html" target="_blank" rel="noreferrer">https://gdal.org/drivers/raster/jpipkak.html</a><br></div><div dir="auto"><br></div><div dir="auto">I have kakadu, but I have never tried the jpip functionality so I can't say how well it works.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Aug 26, 2022, 5:03 AM Martin <<a href="mailto:e11904212@student.tuwien.ac.at" target="_blank" rel="noreferrer">e11904212@student.tuwien.ac.at</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p><font face="Arial" color="#ffffff"> Hi,<br>
</font></p>
<div>
<p style="margin-top:0pt;margin-bottom:10pt;border:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">I
want to process JP2 data via vsicurl. Which works so far. <br>
Unfortunately hundreds of requests are sent, even if only
the data of one tile is required. <br>
I understand that due to the structure of a JP2 file
multiple requests are necessary. But it lo</span><span style="font-size:11pt">oks like GDAL is searching every
single tile (resulting in ~120 requests).</span></font></p>
<p style="margin-top:0pt;margin-bottom:10pt;border:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">Is
there a way to reduce the number of requests?<br>
</span></font></p>
<font face="Arial" color="#ffffff"> </font>
<p style="margin-top:0pt;margin-bottom:10pt;border:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">I
have already tried the JP2ECW-ERDAS driver, same result.</span></font></p>
<font face="Arial" color="#ffffff"></font>
<p style="margin-top:0pt;margin-bottom:10pt;border:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">Do
I have to configure GDAL in a certain way?</span></font></p>
<font face="Arial" color="#ffffff"> </font>
<p style="margin-top:0pt;margin-bottom:10pt;border:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">cmd
for request:</span></font></p>
<font face="Arial" color="#ffffff"> </font>
<p><font face="Arial" color="#ffffff"> #!/bin/bash<br>
</font> <font face="Arial" color="#ffffff"><br>
export GDAL_DISABLE_READDIR_ON_OPEN="YES"<br>
export CPL_VSIL_CURL_ALLOWED_EXTENSIONS="jp2"<br>
export CPL_CURL_VERBOSE="YES"<br>
export GDAL_HTTP_MERGE_CONSECUTIVE_RANGES="YES"<br>
</font> <font face="Arial" color="#ffffff"><br>
gdal_translate --debug ON -srcwin 0 0 256 256
/vsicurl/<a href="http://localhost:8083/T33UWP_20220515T100031_TCI_10m_J2Lmin.jp2" rel="noreferrer noreferrer" target="_blank">http://localhost:8083/T33UWP_20220515T100031_TCI_10m_J2Lmin.jp2</a>
./out_subWin.tif<br>
</font> </p>
<font face="Arial" color="#ffffff"> </font>
<p style="margin-top:0pt;margin-bottom:10pt;border:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">What
options do I need to specify when creating the JP2 file to
support GDAL?</span></font></p>
<font face="Arial" color="#ffffff"> </font>
<p style="margin-top:0pt;margin-bottom:10pt;border:none;border-left:none;border-top:none;border-right:none;border-bottom:none"><font face="Arial" color="#ffffff"><span style="font-size:11pt">Currently
I use the following options:</span></font></p>
<font face="Arial" color="#ffffff"> </font>
<p style="margin-top:0pt;margin-bottom:10pt;border:none;border-left:none;border-top:none;border-right:none;border-bottom:none"><span style="font-family:'Arial';font-size:11pt;color:#000000"><font face="Arial" color="#ffffff"> #!/bin/bash<br>
<br>
gdal_translate \<br>
-of JP2OpenJPEG \<br>
-co QUALITY=100 \<br>
-co TLM=YES \<br>
-co PLT=YES \<br>
-co PROGRESSION=LRCP \<br>
-co WRITE_METADATA=YES \<br>
../test_data/T33UWP_20220515T100031_TCI_10m.tif \<br>
./T33UWP_20220515T100031_TCI_10m_J2Lmin.jp2</font></span></p>
<p style="margin-top:0pt;margin-bottom:10pt;border:none;border-left:none;border-top:none;border-right:none;border-bottom:none"><span style="font-family:'Arial';font-size:11pt;color:#000000"><font face="Arial" color="#ffffff">Some logs:</font></span></p>
<p style="margin-top:0pt;margin-bottom:10pt;border:none;border-left:none;border-top:none;border-right:none;border-bottom:none"><span style="font-family:'Arial';font-size:11pt;color:#000000"><font face="Arial" color="#ffffff">[gdal degug
output](<a href="https://pastebin.com/vTf7tjLJ" rel="noreferrer noreferrer" target="_blank">https://pastebin.com/vTf7tjLJ</a>)<br>
[nginx logs](<a href="https://pastebin.com/8bWW15Tp" rel="noreferrer noreferrer" target="_blank">https://pastebin.com/8bWW15Tp</a>)<br>
[gdalinfo](<a href="https://pastebin.com/HWSmypEQ" rel="noreferrer noreferrer" target="_blank">https://pastebin.com/HWSmypEQ</a>)<br>
</font></span><span style="font-family:'Arial';font-size:11pt;color:#000000"><font face="Arial" color="#ffffff">[opj_dump](<a href="https://pastebin.com/rdYbHEnY" rel="noreferrer noreferrer" target="_blank">https://pastebin.com/rdYbHEnY</a>)<br>
</font></span><span style="font-family:'Arial';font-size:11pt;color:#000000"><font face="Arial" color="#ffffff">[kdu_jp2info](<a href="https://pastebin.com/atVUfeVx" rel="noreferrer noreferrer" target="_blank">https://pastebin.com/atVUfeVx</a>)</font></span><br>
<span style="font-family:'Arial';font-size:11pt;color:#000000"></span></p>
</div>
</div>
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