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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: GISList: Working with large rasters ~100Gb and GIS |
| Date: |
03/17/2003 10:17:18 AM |
| From: |
Jayachandran Mani |
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hi,
In my experience with Aerial photographic mosaic, most
of the digital photogrammetry softwares failed in
handling a 1 + GB image file. It took more than 20 min
for opening the file to have a glimpse. In photoshop
we are not even able to open the file.
All the best for ur work.
Jay
--- Bannerman Bruce <BRUBAN@melbourne.vic.gov.au>
wrote:
> Hello everyone,
>
> Apologies for cross-posting.
>
>
> I'm interested in finding real world experiences
> when working with large
> raster images of approximately 100 Gb.
>
> I'm not interested in claims by vendors.
>
>
> We are about to receive a series of raster images
> (24bit, TIF 6 format).
> These images have been derived from aerial
> photography and are >0.1m
> resolution.
>
> When combined they will form an orthophoto mosaic
> that is ~100 Gb.
>
> *Ideally*, I'd like to manage this data as a single
> image for ease of use by
> novice users and for data management purposes.
>
> As we have business requirements that demand high
> resolution, I'd prefer not
> to compress the image with a lossy format such as
> ECW or MrSid.
>
>
> Our GIS environment is ESRI based. ArcGIS 8.3,
> ArcSDE 8.3, ArcIMS 4.0.1.
> Novice GIS users have access to corporate spatial
> data via a browser. We
> have no intention of adopting an alternate GIS.
>
>
> Our preferred solution is to manage the raster data
> via ArcSDE.
> Unfortunately, I'm finding it difficult to find an
> organisation that has
> experience working with data similar to ours.
>
> An alternate solution if ArcSDE proves not to be
> viable is to use ERMapper's
> Image Web Server, despite the data loss issues.
>
>
> Does anyone have any real world experiences when
> working with large ~100 Gb
> raster data and GIS that they would be willing to
> share?
>
> In particular I'm interested in response times
> experienced by end users.
>
> Any thoughts would be appreciated.
>
>
> Regards,
>
> Bruce Bannerman
> GIS Strategy Officer
> City of Melbourne
> Australia
>
>
>
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