[GRASS-user] ECW data

[William Kyngesburye]

One more possibility, just to be thorough:

If you have an Intel Mac: virtualization.  Parallels is nice (I  
haven't tried VMWare).  You can use either Windows (any version from  
3.1 up), or a Linux of your choice.  It's not emulation, so they run  
at near native speed.  I may end up doing this so I can convert those  
Blue Marble images.

With Linux, the problem is that the communication between OSX and  
Linux is limited to TCP - you need to use FTP or SCP to copy the ECW  
to the Linux file system, then the same to copy the converted files  
back to OSX.  But it's much cheaper ;)

With Windows, you need a retail copy of Windows.  But Parallels can  
directly connect the OSX disk to the Windows system - much easier to  
copy files back and forth, or just let the FWTools operate directly  
on the OSX files.

With both, though, you need to have a few GB free on the OSX file  
system to create the disk image for the virtualized system.


Another possibility is dual-booting an Intel Mac.  Boot Camp can  
easily setup Windows to run natively on your Mac.  The problems: need  
to repartition your disk, can only boot one system at a time, limited  
to Win XP SP2+ (can't do Win 2K :( ), maybe Linux possible (not well  
documented).

On Jul 17, 2007, at 11:59 AM, Maciej Sieczka wrote:

> Richard Greenwood wrote:
>> On 7/15/07, Mars Sjoden <amagine at telus.net> wrote:
>
>>> I'm just wondering what the best way to import a 3.5GB .ecw file  
>>> into
>>> GRASS
>>> is?
>
>> If you have access to a Windows computer, gdal_translate (part of fw
>> tools, fwtools.maptools.org/) should do the job. You could convert it
>> to an intermediate format, e.g Erdas img, then import it into GRASS.
>> ecw is a good format, or at least I like their politics, but it's not
>> handy to use on platforms other than Windows.
>
> The FWTools for GNU Linux includes ECW support too. No need to switch
> to Windows. You can install FWTools in a custom location of your
> preference (I use $HOME/bin/FWTools). It should not interfere with
> system-wide instalation of PROJ, GDAL, MapServer et. all. Works for  
> me.
>
> Maciek
>
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-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

"I ache, therefore I am.  Or in my case - I am, therefore I ache."

- Marvin