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<DIV><FONT face=Arial><FONT size=2><SPAN class=217202618-20052010>Hi
All,</SPAN></FONT></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=217202618-20052010>I am seeking
some advice/ alternative ideas about the following project I am working
on...<BR>I have been tasked with researching the best and fastest options
serving huge raster datasets on a web map using OpenLayers o the fly (using all
Open Source software). We want to serve the US NAIP Aerials in 1m resolution
(which are a total of about 4.7 TB of MrSid/Jp2 data) on a interactive web
map as an optional map background. The are using MapServer to serve our
other (vector) data such as roads, rivers etc as WMS to overlay onto
this. Of course there are many ways to go about this but one of the things we
determined early on is that MapServer is too slow to serve compressed imagery
such as the native MrSid Jp2 imagery on the fly for our needs. Thus, one option
would be to spare MapServer from having to decompress the images. We can then
also avoid having to convert them to tiff and adding overviews (using gdaladdo
for example). This would also "blow up" the total data volume to something about
60 TB ...<BR>Thus, we are in the process of researching options on how to serve
the compressed data as fast as possible "on the fly" and without the need for
caching them on disk (that means no TileCache nor GeoWebCache should be used
because that also would involve having to set up huge storage spaces ...<BR>One
option I came about was using IIpimage server and this would then involve
converting the MrSid all to Jp2 format. One advantage is that OpenLayers 2.9
already has natively the Zoomify layer support so that we can easily add the
images coming out of IIPImage Server Zoomify + JPEG2000 server <A
href="http://help.oldmapsonline.org/jpeg2000/">http://help.oldmapsonline.org/jpeg2000/</A><BR>I
also found that another option is the Djatoka Jpeg 2000 Image Server <A
href="http://sourceforge.net/apps/mediawiki/djatoka/index.php?title=Main_Page">http://sourceforge.net/apps/mediawiki/djatoka/index.php?title=Main_Page</A>
and the J2K Tiler Renderer: <A
href="http://dltj.org/article/introducing-j2ktilerenderer/">http://dltj.org/article/introducing-j2ktilerenderer/</A>.
<BR>None of the above seem to enable output as WMS (correct me if I'm
wrong). One draw back is that all of those above are using the Kakadu
library which is great but not free for commercial
use.</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=217202618-20052010>I also wanted
to research how the use of this new proxy server <A
href="http://mapproxy.org/">http://mapproxy.org/</A> could improve our
speed in combination with e.g. IIP Image server... </SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN
class=217202618-20052010></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=217202618-20052010>Anybody has
experiences with any of the above or comments ?</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN class=217202618-20052010>Any input what
you think would be the fastest option to serve the compressed US NAIP onto
a web map on the fly (without caching tiles on disk)
?</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN
class=217202618-20052010></SPAN></FONT></FONT> </DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN
class=217202618-20052010>Cheers</SPAN></FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><SPAN
class=217202618-20052010>Karsten</SPAN></FONT></FONT></DIV></BODY></HTML>