[GRASS-user] ECW data
Agustin Diez Castillo
Agustin.Diez at uv.es
Tue Jul 17 14:30:34 EDT 2007
I use Paralells + windows and have no problem to read ecw ... but the
problems is that exporting ecw to something else makes files really
big, the good thing will be to be able to read ecw in Mac.
In the commercial side Canvas works fine.
On Jul 17, 2007, at 7:35 PM, William Kyngesburye wrote:
> 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
>>> 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
>>> 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.
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>> grassuser at grass.itc.it
> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
> "I ache, therefore I am. Or in my case - I am, therefore I ache."
> - Marvin
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