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<DIV dir=ltr align=left><SPAN class=859435416-14062007><FONT face=Arial
color=#0000ff size=2>I totally agree with the kudos to Frank for FWTools.
I have used them several times now and they can do some things that otherwise
only very high priced image processing software can do.</FONT></SPAN></DIV>
<DIV> </DIV><!-- Converted from text/rtf format -->
<P><SPAN lang=en-us><FONT face=Tahoma size=1>Andy </FONT></SPAN><BR></P>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> mapguide-users-bounces@lists.osgeo.org
[mailto:mapguide-users-bounces@lists.osgeo.org] <B>On Behalf Of </B>Jonathon
McIntyre<BR><B>Sent:</B> Thursday, June 14, 2007 9:50 AM<BR><B>To:</B> MapGuide
Users Mail List<BR><B>Subject:</B> RE: [mapguide-users] MrSID files through GDAL
FDO provider<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">BTW, I tried the gdal_translate
to test how the images work as ecw however, they end up being larger than the
500MB limit set by the free ECW sdk so they won’t translate. The FWTools
is a very cool utility though. Frank has done a great job with
it.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d">Jonathon<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="COLOR: #1f497d"><o:p> </o:p></SPAN></P>
<DIV>
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<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; 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: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'">Hi
Jonathon,</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'">All of
my answers refer to 1.2 RC1.</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'">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: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'">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: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'">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: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'">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: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"> <o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'"><A
href="http://trac.osgeo.org/mapguide/ticket/191">http://trac.osgeo.org/mapguide/ticket/191</A></SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'"><A
href="http://trac.osgeo.org/mapguide/ticket/187">http://trac.osgeo.org/mapguide/ticket/187</A></SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Arial','sans-serif'"><A
href="http://trac.osgeo.org/mapguide/ticket/160">http://trac.osgeo.org/mapguide/ticket/160</A></SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman','serif'"> <o:p></o:p></SPAN></P>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; 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>
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<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; 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: 12pt; 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></DIV></BODY></HTML>