I have about 200 ECW files of recently acquired 1-foot resolution aerial photos. Its about 15GB worth, covering over 250 sq. miles. Unfortunately, you need a license from ER Mapper that runs about $10K to publish ECWs in ArcGIS Server. I brought them all into GlobalMapper, mosaiced them, and pushed out a jpeg2000 that is about 31GB in size. It actually draws quite well, looks gorgeous, and is pretty snappy. Anyone have any other suggestions on how to deal with imagery datasets of this size (and by size I mean both areal extent and filesize)?
Now that you have the data in JP2, simply create a cached map service of the data within ArcGIS?
I've just heard that ERDAS is about to launch a low cost AGS plugin (verified here). The rep was pretty clear its going to be no where near the $10k previous price so I'm rather intrigued.
It will be interesting to see how it performs in v10. Last time i looked into it, ECW was at least 3x faster than the same JP2 in AGS 9.3 so I'm hoping that means I won't need to cache at all
I think it would depend on what the intended use of this imagery is (Tiled Layer Service, Image Layer Service...etc)
If you are looking to create a ArcGIS Server Tiled Service Layer, you can define "Gridding" parameters during the export from Global Mapper. So, load the ECW(s) into Global Mapper, and export tiles to jpeg 2000. Once a cache is created for these tiles, any respectable client should see good performance with such a service.