[mapserver-users] GDAL and gdaladdo

[Tyler Mitchell]

Matthew wrote:
>I am not sure how gdaladdo works with TIFF files, however I think it
stores
>the overview files internally to the input image from browsing the
>documentation.

Yes, the overviews are internal to the tiff files.



                                                                                                                      
                      KRUSEMARK Matthew G                                                                             
                      <matthew.g.krusemark at co.multn        To:       "'Ryan, Adam'" <ARyan at co.linn.or.us>             
                      omah.or.us>                          cc:       "'mapserver-users at lists.gis.umn.edu'"            
                      Sent by:                              <mapserver-users at lists.gis.umn.edu>                       
                      owner-mapserver-users at lists.g        Fax to:                                                    
                      is.umn.edu                           Subject:  RE: [mapserver-users] GDAL and gdaladdo          
                                                                                                                      
                                                                                                                      
                      07/26/2002 02:19 PM                                                                             
                                                                                                                      
                                                                                                                      




Hi,

The documentation and win bindaries I have worked with are hosted at
http://www.remotesensing.org/gdal/

The GDAL utilities descriptions are at
http://www.remotesensing.org/gdal/gdal_utilities.html

I am not sure how gdaladdo works with TIFF files, however I think it stores
the overview files internally to the input image from browsing the
documentation.

I have used GDAL quite a bit to convert images, for example to convert from
GeoTIFF to JPEG format and keep the coordinates with the output JPEG and it
works great, example:

C:\gdal115a\bin>gdal_translate -of GTiff -co "QUALITY=n" 1n2e.tif 1n2e.jpg

Hope this was of some help, -matt

-----Original Message-----
From: Ryan, Adam [mailto:ARyan at co.linn.or.us]
Sent: Friday, July 26, 2002 12:00 PM
To: Mapserver User List; warmerdam at pobox.com
Subject: [mapserver-users] GDAL and gdaladdo




Dear Mr. Warmerdam and List,

I use the 'out-of-the-box' Mapserver Win32 binary.  I've never compiled
MapServer myself. I recently downloaded the binary with GDAL support.  I
want to generate overviews of my tiffs with gdaladdo but I haven't the
foggiest idea of how to do that. The MapserverWiki has this:


warmerda at gdal[430]% gdaladdo
 Usage: gdaladdo [-r {nearest,average,average_mp,average_magphase,mode}]
                filename levels
 Example:
  % gdaladdo -r average abc.tif 2 4 8 16



What is this?  What language is this?  Where is this gdalladdo?  Why is it
that as soon as I think I get a handle on things, I realize how little I
know?

Adam Ryan
Linn County