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<p class=MsoNormal><span style='color:#1F497D'>Thanks for your feedback
Andy. The issues you have logged, I am definitely finding also.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>In reference to my previous
email, I have tried a few things…<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>I removed the ecw
dll from the C:\Program Files\MapGuideOpenSource\Server\Bin\gdalplugins.
I no longer see the gdal fdo provider checking to see if the images are
ecw. This does help improve performance.<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>I created a 2.5 GB
single mosaiced image of all the images with 10 zoom levels built in. I
get more than acceptable performance from it (<5 seconds). After the
initial load, it is almost instantaneous. Whereas the individual images
in the same directory locked up my machine with the processor pegged at 100%
for minutes at a time and often nothing would display.<o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>I have also noticed
what Andy has indicated, that on initial map open, the gdal fdo provider seems
to open each image and I think because MrSids have the zoom levels built in
this is problematic…at least on my machine. <o:p></o:p></span></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='color:#1F497D'><span style='mso-list:Ignore'>4.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='color:#1F497D'>I have attached the
messages from the mgserver console<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>GDAL:
GDALOpen(C:\projects\FRPA\Orthos - 2004/frpa.sid) called.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 1 with
size 91188x48715.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 2 with
size 45594x24358.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 3 with
size 22797x12179.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 4 with
size 11399x6090.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 5 with
size 5700x3045.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 6 with
size 2850x1523.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 7 with
size 1425x762.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 8 with
size 713x381.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 9 with
size 357x191.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 10 with
size 179x96.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened zoom level 0 with
size 182375x97430.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Opened image: width
182375, height 97430, bands 3<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>GDAL:
GDALOpen(C:\projects\FRPA\Orthos - 2004/frpa.sid) succeeds as MrSID.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: RasterIO() - using
optimized dataset level IO.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Dataset:IRasterIO(0,0
182375x97430 -> 713x381 -> 398x353, zoom=256)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: RasterIO() - using
optimized dataset level IO.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>MrSID: Dataset:IRasterIO(0,0
182375x97430 -> 713x381 -> 398x353, zoom=256)<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mapguide-users-bounces@lists.osgeo.org [mailto:mapguide-users-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Andy Morsell<br>
<b>Sent:</b> Wednesday, June 13, 2007 11:20 PM<br>
<b>To:</b> 'MapGuide Users Mail List'<br>
<b>Subject:</b> RE: [mapguide-users] MrSID files through GDAL FDO provider<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Hi Jonathon,</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>All of my answers refer to 1.2 RC1.</span><span style='font-size:
12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Yes, the GDAL provider does try to hit all of the images in the
feature source when the map is first accessed regardless of whether that layer
is actually visible. This issue has been entered by me into Trac
already. </span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>I have seen the ECW and MrSID providers trying to access the same
image files as well. Doesn't make sense to me either.</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>I am currently running a client site with 10 GB of ECW imagery,
each about 25 MB and seeing relatively good performance (except for the first
issue above). So, perhaps your issue is more confined to the MrSID
format? In my case, the data started as JPEG2000 format which the GDAL
provider could not successfully read so I used fwtools gdal_translate to
convert all of them to ECW. Perhaps translating your MrSID's to ECW's
would help in this case? Also, Jason Birch and others are working on
image tile index support for directories of images which could help with your
particular problem.</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>By the way, here are some of the GDAL issues I have logged
with the 1.2 beta that might be of interest:</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'><a href="http://trac.osgeo.org/mapguide/ticket/191">http://trac.osgeo.org/mapguide/ticket/191</a></span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'><a href="http://trac.osgeo.org/mapguide/ticket/187">http://trac.osgeo.org/mapguide/ticket/187</a></span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'><a href="http://trac.osgeo.org/mapguide/ticket/160">http://trac.osgeo.org/mapguide/ticket/160</a></span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p>
</div>
<p><span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Andy
Morsell, P.E.</span> <br>
<span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'>Spatial
Integrators, Inc.</span> <br>
<span style='font-size:7.5pt;font-family:"Tahoma","sans-serif"'><a
href="http://www.SpatialGIS.com">http://www.SpatialGIS.com</a></span> <o:p></o:p></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> mapguide-users-bounces@lists.osgeo.org
[mailto:mapguide-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Jonathon
McIntyre<br>
<b>Sent:</b> Wednesday, June 13, 2007 12:21 PM<br>
<b>To:</b> mapguide-users@lists.osgeo.org<br>
<b>Subject:</b> [mapguide-users] MrSID files through GDAL FDO provider</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal>Good morning,<o:p></o:p></p>
<p class=MsoNormal>I am working with MGOS 1.2 RC1 and the latest GDAL FDO
providers on XP Pro.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have a directory with twenty five 40MB MrSID files in
it. If I create a single data source against that directory, I have a
limited possibility that the images will actually process although there does
not seem to be any errors when I run MGServer from the command line. It appears
that the datasource is processed whether or not the layer is turned on.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>As an aside, I did notice that if I have the ECW dll
in the directory, the messages indicate that it is trying to read the .sid
format files as ECW which adds to the time.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>In order to test things out, I created a data source for
each file. I noticed that for a couple of files, the processor usage
spikes to 100% but the images are displayed quickly. As I add more files,
the processor spikes become longer and the delays far more apparent. When
I get all 25 added my processor spikes to 100% usage for several minutes
although the images will eventually display. Watching the mgserver from
the command line shows that the images process and some go very quickly but
others seem to be very slow (which may just be the result of the processor
being pegged).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I tried using fwtools to mosaic these images together but
can only get about 4 together before I hit the 4GB tiff limit.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am trying to create a new single mosaiced .sid file to see
if that will make a difference but was wondering if there were any other ideas
of what I could do to improve the performance of the display of the images?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal>J<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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