[Mapserver-users] Problem w/ 8-bit TIF & Mapserver 3.3

[mp28 at humboldt.edu]

  Eureka! We found it.... the tiff did indeed need to be converted to
indexed color. That was the only problem. And (thankfully) I see that
Photoshop has a batch option which will help with the ~340 other images.
Thanks for all of your help!

Matthew Perry
Humboldt State University
Environmental and Natural Resource Sciences
mp28 at humboldt.edu
http://ktrin.cnrs.humboldt.edu

> Hello Matthew,
>
> MapServer 3.3?  Wow!  Three things I can think of:
>
> 1. Is you TIFF image a bitmap (indexed color) or RGB (true color)?  If
> RGB, you'll need to convert it into indexed color.  If you have
> Photoshop (or gimp) it's very easy --Click on Image-->Mode-->Indexed
> Color
> The TFW file should still be valid as you didn't change the resolution.
>
> 2. This is what will fix your problem...  change the extension of your
> TFW file to WLD.
>
> 3. Put your DATA path in quotes: DATA "./aerial/nov01_utm/rm94g_wv.tif"
>    This probably doesn't do a thing on *Nix but it matters on Windows.
>
> Good luck!
> -Perry
>
>
> On Tue, 2003-08-05 at 19:58, mp28 wrote:
>> Hello,
>>  I've been working on getting mapserver to render a set of
>> high-resolution
>> aerial photos. The images are in .tif format, unsigned 8-bit with an
>> associated .tfw file. We are currently using Mapserver v3.3. For testing
>> purposes we are trying to get just a single image to work but here is
>> the
>> problem.... Mapserver doesn't return an image (in map mode) when the
>> layer is
>> added. Here is the mapfile entry ->
>>
>> LAYER # Aerial test
>> 	NAME "aerial"
>>         DATA ./aerial/nov01_utm/rm94g_wv.tif
>> 	STATUS OFF
>> 	TYPE RASTER
>> END
>>
>> The file size of the test photo is 15.4 MB which shouldn't be a problem
>> since
>> we're successfully using a 30 MB tif w/ mapserver. The paths are correct
>> (other tifs in the same directory work). The image is 8-bit and displays
>> perfectly in other GIS/RS software.
>>
>> Is there any thing I'm forgetting? Is there some minor variation in the
>> .tif
>> format that could be causing this? Has anyone run into this before??
>>
>> I'll have access to the mapserver error log tomorrow... is there
>> anything I
>> should look for?
>>
>> Thanks for the help, guys.
>>
>> Matthew Perry
>> Humboldt State University
>> Environmental and Natural Resource Sciences
>> mp28 at humboldt.edu
>> http://ktrin.cnrs.humboldt.edu
>>
>> _______________________________________________
>> Mapserver-users mailing list
>> Mapserver-users at lists.gis.umn.edu
>> http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> --
> Pericles S. Nacionales <nacional at cbs.umn.edu>
> University of Minnesota
>