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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: [gislist] Seeking Opinions on Lizardtech's MrSID |
| Date: |
11/06/2003 06:50:01 PM |
| From: |
Sonny Parafina |
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Why is ECW the only choice? Wouldn't moving to another vendor
implementation of wavelet compression put users at risk again?
Why not JPEG200 (JP2), which is based on an ISO standard? Leica/Erdas is
supporting JP2 and Mapping Science has put out GeoJP2.
The geospatial JP2 page is hosted at http://www.remotesensing.org/jpeg2000/
As for free and low cost tools, there are links on the page, including
support for it in Frank Warmerdam's GDAL. Kudos to Frank for yet another
contribution to the geospatial community.
Regards,
sonny
-----Original Message-----
From: gislist-bounces@lists.thinkburst.com
[mailto:gislist-bounces@lists.thinkburst.com]On Behalf Of Dimitri Rotow
Sent: Thursday, November 06, 2003 5:26 PM
To: gislist@lists.thinkburst.com
Subject: RE: [gislist] Seeking Opinions on Lizardtech's MrSID
<snip>
It's clear that many users of MrSID now realize that not only is the format
held hostage by its new owners, they as users are being held hostage as
well. There is an easy solution for all this: switch to ECW. It's a good
format as I can attest from personal experience.
<snip>
Early next year I expect we will participate in an "Image Rescue" campaign
now being informally discussed within the public and private GIS community
to rescue images trapped in MrSID format and to convert them to open ECW
format. Part of Image Rescue will be a set of free and open tools that will
enable mass conversion of images from MrSID format into ECW format.
ERMapper has a very confident and open licensing agreement for their ECW SDK
and very widespread support within the independent software vendor
community. Clearly, ECW is a far more "open" format than MrSID.
I could be wrong about this, but my guess is that if people have very low
cost or free tools for achieving image compression that is superior to MrSID
in all ways, that if they have free tools to easily rescue images now
trapped in MrSID format and if they have an open ECW standard supported with
a wide array of development tools from many different vendors, well,... who
in their right mind would voluntarily continue wearing a sack over their
head and manacles on their arms and legs and a financial drain on their
budget by using MrSID?
Cheers,
Dimitri
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