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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | GISList: Working with large rasters ~100Gb and GIS |
| Date: |
03/17/2003 10:17:18 AM |
| From: |
Bannerman Bruce |
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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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