[Mapserver-users] GDAL, TIFF, JPEG Question

[Pericles S. Nacionales]

Thanks, Ed!

I guess I could be clearer but that's exactly why I brought this up. 
The many and sometimes redundant options in MapServer do get people
confused.  I don't know how many users configure GDAL without TIFF and
JPEG support--I would guess that most people leave them in.

-Perry N.

On Thu, 2004-01-22 at 15:31, Ed McNierney wrote:
> The chief problem is user confusion; there are many options and it can
> be easy for the user to not understand what driver is reading the data.
> It is certainly possible to build GDAL *without* support for TIFF and
> JPEG images, so the report "INPUT=TIFF, INPUT=JPEG, INPUT=GDAL" doesn't
> necessarily mean redundant drivers - but it probably does <g>!
> 
> I believe there have been discussions about removing the "native" TIFF
> support (at least) in favor of GDAL, since there is little advantage to
> it and there are many new "TIFF" options that are really new features
> only supported by GDAL.
> 
> MapServer doesn't get "confused" - the user does <g>.  But that's
> something we should strive to avoid.
> 
> 	- Ed (very minor MapServer attendant deity)
> 
> Ed McNierney
> President and Chief Mapmaker
> TopoZone.com
> -----Original Message-----
> From: Pericles S. Nacionales [mailto:nacional at cbs.umn.edu] 
> Sent: Thursday, January 22, 2004 3:49 PM
> To: mapserver-users at lists.gis.umn.edu
> Subject: [Mapserver-users] GDAL, TIFF, JPEG Question
> 
> Dear MapServer gods,
> 
> I'm seeing a lot of folks send the output of "mapserv -v" like this:
> 
> MapServer version 4.0.1 OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=PDF
> SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
> INPUT=TIFF INPUT=JPEG INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
> 
> At first glance it all looks good.  But then look at  INPUT=TIFF,
> INPUT=JPEG, INPUT=GDAL.  Isn't compiling GDAL, TIFF and JPEG together as
> input libraries not a good idea?  Or is this no longer an issue?  I ask
> because I'm seeing a lot of this and am wondering if we should include
> something like this in the MapServer FAQ:
> 
> If you compile GDAL support make sure to disable TIFF and JPEG input
> support.  
> This can be accomplished by adding "--without-tiff --without-jpeg"  
> parameters when running "configure".  Alternatively, you can remove
> "-DUSE_TIFF" and "-DUSE_JPEG" in your Makefile (or Makefile.vc) before
> running make (or nmake).
> 
> What exactly are the problems that come up when TIFF and JPEG libs are
> compiled together with GDAL?  I know MapServer gets confused when
> reading TIFF/GeoTIFF images.  Are there others?
> 
> 
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-- 
Pericles S. Nacionales <nacional at cbs.umn.edu>
University of Minnesota