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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: |
Hugo Ahlenius |
|
|
Hi,
Theroetically ArcSDE should be able to make it (it also depends on the
database). The loading would take quite some time though -- but perhaps
that could be helped by loading them as tiles.
I would advise you to test ArcSDE with a bogus 100gb image: try creating
tiles of bogus images (your vacation photos?) resampled to ridiculously
high resolution and giving bogus co-ordinates.
Hugo
-------------------------------------------------------------
Hugo Ahlenius E-Mail: hugo@grida.no
Project Officer Phone: +46 8 7410451
UNEP GRID-Arendal Fax: +46 733 403285
Stockholm Office Mobile: +46 733 467111
WWW: http://www.grida.no
-------------------------------------------------------------
| -----Original Message-----
| From: Bannerman Bruce [mailto:BRUBAN@melbourne.vic.gov.au]
| Sent: Friday, March 07, 2003 06:08
| To: gislist@geocomm.com: 'IMAGRS-L@CESNET.CZ'
| Subject: GISList: Working with large rasters ~100Gb and GIS
|
|
| 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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