<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
<META content="MSHTML 6.00.6000.16890" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT face=Arial size=2><SPAN class=822363319-20052010>I sent this to the
OSGEO dicussion list but thought on this list I might find soem good experst on
this as well... So sorry for cross posting ...</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=822363319-20052010></SPAN></FONT> </DIV>
<DIV><FONT><SPAN class=822363319-20052010><FONT face=Arial size=2><SPAN
class=217202618-20052010>Hi All,</SPAN></FONT></DIV>
<DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><SPAN class=217202618-20052010><FONT face=Arial size=2>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 </FONT><A
href="blocked::http://help.oldmapsonline.org/jpeg2000/"><FONT face=Arial
size=2>http://help.oldmapsonline.org/jpeg2000/</FONT></A><BR><FONT face=Arial
size=2>I also found that another option is the Djatoka Jpeg 2000 Image Server
</FONT><A
href="blocked::http://sourceforge.net/apps/mediawiki/djatoka/index.php?title=Main_Page"><FONT
face=Arial
size=2>http://sourceforge.net/apps/mediawiki/djatoka/index.php?title=Main_Page</FONT></A><FONT
face=Arial size=2> and the J2K Tiler Renderer: </FONT><A
href="blocked::http://dltj.org/article/introducing-j2ktilerenderer/"><FONT
face=Arial
size=2>http://dltj.org/article/introducing-j2ktilerenderer/</FONT></A><FONT
face=Arial size=2>. <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.</FONT></SPAN></DIV>
<DIV><SPAN class=217202618-20052010><FONT face=Arial><FONT size=2>I also wanted
to research how <SPAN class=822363319-20052010>Mapproxy
</SPAN></FONT></FONT><A href="http://mapproxy.org/"><FONT face=Arial
size=2>http://mapproxy.org/</FONT></A><FONT face=Arial size=2> could
improve our speed in combination with e.g. IIP Image server...
</FONT></SPAN></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=217202618-20052010></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=217202618-20052010>Anybody has
experiences with any of the above or comments ?</SPAN></FONT></DIV>
<DIV><FONT face=Arial 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></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=217202618-20052010></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=217202618-20052010>Cheers</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=217202618-20052010>Karsten</SPAN></FONT></DIV></SPAN></FONT></DIV>
<DIV><FONT size=2><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Verdana"><BR>Karsten
Vennemann<BR></SPAN></FONT><FONT color=#003264 size=1><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: Verdana"><A
href="http://www.terragis.net">www.terragis.net</A></SPAN></FONT></DIV></BODY></HTML>