shrug-l: Compressing TIFFs

Tripp Corbin tcorbin at keckwood.com
Tue Apr 17 12:42:00 EDT 2007


Kristal,
Have you tried using ArcScan? I do not think it has a size limit. Other
than that you will need to reduce the actual file size and not through
compression. Compression only reduces the storage size. The image must
decompress into memory when viewed bring it back to it's original size
or at least that is the way I understand it. So you would need to reduce
your resolution, trim the image or some combination of both.
 
 

Tripp Corbin, MCP, CFM, GISP

Associate Vice President, GIS/Mapping

ESRI Authorized Instructor

Keck & Wood, Inc.

 <http://www.keckwood.com/> www.keckwood.com

(678) 417-4013

(678) 417-8785 fax

 

Keck & Wood, Inc offers instructor led and virtual training for ESRI's
ArcGIS & ArcView software.
Please visit  <http://www.keckwood.com/> www.keckwood.com for more
information including a schedule of upcoming classes. 


-----Original Message-----
From: shrug-l-bounces at lists.dep.state.fl.us
[mailto:shrug-l-bounces at lists.dep.state.fl.us] On Behalf Of Kristal
Walsh
Sent: Tuesday, April 17, 2007 11:42 AM
To: shrug-l at lists.dep.state.fl.us
Subject: shrug-l: Compressing TIFFs



Good morning everybody, I have received a large TIFF of an old scanned
map that is approx. 450mb.  I georeferenced it and tried to convert to
vector for further clean-up but spatial analyst is giving me an 'over
the max 2GB' error.  I tried a lossee compression because I just need
the boundaries from the map but this did not help and took over 2 hours
to process.  Can anyone give me a suggestion? Thanks! Kristal

 

Kristal Walsh, GIS Specialist

Baskerville-Donovan, Inc.

449 W. Main Street

Pensacola, Florida 32502

(850) 438-9661, ext. 4354

 

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