Serving MrSidd images

[Serkan Girgin]

Hi!

If you want you can re-compress GeoTIFF into ECW (directly supported by
MapServer) using gdal_translate to save space. Even without break down to
smaller tiles the performance is also very good, at least for my case (1.5Gb
single file, 135093x67205 pixels).

Regards, 

---
Serkan Girgin
girgink at gmail.com 

-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of Neil "Nemo" Martinko
Sent: Tuesday, January 17, 2006 10:18 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] Serving MrSidd images

"""
You can download the LizardTech MrSID Decode program and make your MrSID
files into GeoTIFFs.
"""

Yes, you can...  But remember, MrSIDs are COMPRESSED.

I have a MrSID of my county that is almost 1GB.  I wanted to serve it with
MapServer, so I came up with "the plan"...  1) Break the MrSID into sixteen
GeoTIFFs with mrsiddecode.  2) Create an index with gdaltindex.  3) Add the
index to a mapfile.

I created a small Python script to complete step 1...  And wound up with
sixteen GeoTIFFs that totaled nearly 15GB.

----
Nemo -- Iron County Forestry and Parks Dept