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Editing .sid/mrsid files

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#1
WelshGIS

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I need to(ie it would be cool if I could) edit .sid/mrsid files while still maintaining their spatial attributes. Is there software available to do this (preferably freeware/shareware, but doesn't have to be) I'm trying to place several .sid layers into a single map, and the files I'm using have black edges (at least three colors actually), so some part of one orthophoto is always covered up by another.

Any help is appreciated.

Thanks!!

#2
Matthew Hampton

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There used to be a plug-in for Photoshop 5 that could open/edit/save .sid files at varying compression ratio's and even no compression.

Be careful what you ask for however, as editing uncompressed Mr.Sid files is not for the faint of heart.

co-cartographic creator of boringmaps.com


#3
WelshGIS

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Thanks for the quick reply cartomat. I've searched the web for mention of this plug-in and it actually led me to a different thread in the CartoTalk forums. First of all, I can't find this plug-in mentioned in more than 10 places net-wide. Second, Photoshop is now up to version 8, I believe, which makes traking down V.5 a difficult task.

Perhaps the better question would be how are .sid files made (ie what program, etc.), and is it possible to edit them in said program(s).

#4
Martin Gamache

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The tools are available from Lizardtech.

There are some free utilities to extract sid to TIFs and to use regular software to edit them. Lizardtech has a command line utility that can do this in batch mode.

#5
mdsumner

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There's a variety of tools for getting around the MrSID problem. There are some (German made) tools for MrSid that perform better than the LizardTech ones.

There was some discussion here:
http://www.georefere...ault.aspx#13708

Here are the links (and timing results): I don't know if these links will still work.

OK, I downloaded everything I could lay my hands on except Tatuk and did a test export using a relatively small .sid file (uncompresses to a 598 MB .tif) with each tool. The results are:

MrSidDecode 4.0.9.713: 36:30

http://www.lizardtec...ddecode_win.zip

MrSidDecodeFast 1.0: 3:00

http://rapidshare.de...deFast.zip.html

MrSidExtract 1.0: 3:10

http://rapidshare.de...xtract.zip.html

MrSidGeoViewer 2.4.1.0: 26:45

ftp://ftp.nhcgov.com/gisdata/orthos/MrSIDGeoViewerSetup.exe

GlobalMapper 7.1: 4:45

http://www.globalmap...pper7_setup.exe

IrfanView 3.97 with plugins: canceled after 30 minutes of waiting

http://www.tucows.com/get/194967_75076

http://www.tucows.com/get/194967_75078



#6
WelshGIS

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Thanks for all of the replys - I have one last question before I start plugging away at an attempt.

Is there a difference between .sid & .mrsid files in terms of which of these programs will be effective in opening/editing them?

#7
mdsumner

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Not sure if this will be helpful, but it's just been posted on georeference.org

Projections and MrSID Files (the Manifold perspective)

http://69.17.46.171/...773697277900000

#8
carneyman

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Hey, was there a info file that went with the mrsiddecodefast.exe program? I am trying to decode sid files for use on Manifold, and the lizard tech decoder doesn't always work and when it does, it takes forever. Any help would be great.

#9
Martin Gamache

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Part of the problem is that there are now new Sid formats that the old decode utility cannot read.

#10
carneyman

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We tried using the new decoder from lizard tech (issued in may), but it would decode any of the files. I would like to try the mrsiddecodefast one, especially if it is faster. but any that would work would be great.

#11
Martin Gamache

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I have software here that usually works (PCI), not sure if the free PCI viewer can open Sid files?

I'd be happy to have a look at it...just send a PM.

#12
rmcculley

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You could use GDAL to convert the sid's to tiff's. If you download the FW-Tools kit it includes the ability to read .sid's by default. From there you can convert the .sid files to anything listed here.




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