Structuring rasters?

[Ed McNierney]

Jeff -

Step 1 is to get rid of the JPEGs!

Do you know how large the aerial photos would be as uncompressed TIFFs?  Can
you afford that much space?  There are some intermediate solutions that can
work well (tiled TIFFs with JPEG compression) if you're tight on space.

     - Ed

-- 
Ed McNierney
President and Chief Mapmaker
Maps a la carte, Inc. / TopoZone.com
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: (978) 251-4242
Fax: (978) 251-1396
ed at topozone.com

> From: Jeff Dege <jdege at KORTERRA.COM>
> Reply-To: Jeff Dege <jdege at KORTERRA.COM>
> Date: Fri, 18 May 2007 14:47:02 -0500
> To: <MAPSERVER-USERS at LISTS.UMN.EDU>
> Conversation: Structuring rasters?
> Subject: [UMN_MAPSERVER-USERS] Structuring rasters?
> 
> We have a customer who wants to integrate aerial photos into their maps.
> 
> The extent of the map is that of a middle-sized state.  200-400
> kilometers.
> 
> The tightest zoom is a couple of blocks.  100-200 meters.
> 
> (Map size scales with the browser - figure 600-800 pixels.)
> 
> I've done a bit of playing around with the GDAL tools with a
> county-level dataset.  From this I learned that:
> 
> 1.  You can futz around with this stuff forever, never getting it quite
> right.
> 2.  You're chunking enough data that every failed attempt takes forever.
> 
> The question is, given a few tens of thousands of hi-res jpegs, what is
> the best way to restructure them so as to give acceptable performance
> through Mapserver?