[Mapserver-users] Mr SID & Mapserver

[Dylan Keon]

You're probably working on an ext2 partition, which imposes the 2GB file 
size limit.  If you have disk space you might try creating a separate 
partition (or add another disk) and format it as ext3 or reiserfs.  I 
believe those filesystems both allow file sizes > 2GB, at least when 
using a recent 2.4.x kernel.  Actually, they may have even fixed that 
limitation for ext2 in recent kernels...I'm not sure.

Another option for those of you using Windows is Irfanview, which is a 
fantastic little program that supports a large number of image formats, 
including MrSID.  Be sure to install the plugins.  It will allow you to 
convert MrSID images to TIFFs as a batch process.  You'll need to rename 
your world files, but that's about it.  This might not work with huge 
MrSID files, but I've had success converting 50MB files.

--Dylan


Jim Burnett wrote:
> How do I split my larg Mr Sid file? I cant un-compress it in Linux because
> of the 2 gig limitation.
> So how would I split it ?
> 
> ----- Original Message -----
> From: "Randy James" <rjames57 at yahoo.com>
> To: "Jim Burnett" <r000t at adelphia.net>
> Cc: <Mapserver-users at lists.gis.umn.edu>
> Sent: Thursday, April 17, 2003 2:09 PM
> Subject: Re: [Mapserver-users] Mr SID & Mapserver
> 
> 
> 
>>Hi
>>
>>I have 20 gigs geotiffs broken into 160mb files and than
>>tiled using the gdal tools; to handle large my tif files.
>>But i'm not displaying all the tiles at once just when
>>zooming in  (they turn on at 1:150,000) and for query
>>results.
>>
>>Cheers
>>Randy
>>
>>--- Jim Burnett <r000t at adelphia.net> wrote:
>>
>>>Yes but the problem is these Mr Sid files are 3-6gigs
>>>un-compressed into
>>>tiff format. Linux can only handle 2 gig files.
>>>
>>>-jim
>>>
>>>----- Original Message -----
>>>From: "Randy James" <rjames57 at yahoo.com>
>>>To: <r000t at adelphia.net>
>>>Cc: <Mapserver-users at lists.gis.umn.edu>
>>>Sent: Thursday, April 17, 2003 12:31 PM
>>>Subject: Re: [Mapserver-users] Mr SID & Mapserver
>>>
>>>
>>>
>>>>Hi
>>>>
>>>>I have been using the MrSID Viewer(www.landsystems.com,
>>>>Lizardtech) to convert MrSid files to geotiff, than
>>>
>>>using
>>>
>>>>the tif in mapserver.
>>>>
>>>>cheers
>>>>Randy
>>>>
>>>>--- Frank Warmerdam <warmerdam at pobox.com> wrote:
>>>>
>>>>>Jim Burnett wrote:
>>>>>
>>>>>>Anyone have any ideas on how to integrate Mr SID
>>>
>>>with a
>>>
>>>>>mapserver or
>>>>>
>>>>>>mapscript application? Any good "on the fly" mr sid
>>>>>
>>>>>converters out there?
>>>>>
>>>>>Jim,
>>>>>
>>>>>I am unaware of any existing method of using MrSID
>>>>>directly with MapServer;
>>>>>however, Andrey Kiselev and I will be implementing
>>>
>>>MrSID
>>>
>>>>>support in GDAL
>>>>>(used by MapServer) over the coming four weeks.  To
>>>
>>>use
>>>
>>>>>it you would still
>>>>>need to license a MrSID SDK from Lizardtech.
>>>>>
>>>>>Best regards,
s

-- 
************************************************
  Dylan Keon
  GIS/Database Specialist
  Northwest Alliance for Computational
  Science and Engineering (NACSE)
  Oregon State University
  Corvallis, OR 97331
  keon at nacse.org        (541) 737-6608
************************************************