[Mapserver-users] MapServer/gdal doesn't like Photoshop tiff

Wed May 19 03:55:53 EDT 2004

Dear Jacob,

probably your Photoshop uses a kind of compression per default.
I don't have Photoshop (I use Iview), but when you save your file, it is 
important, that you use "no compression" in the options.

Maybe that helps, Till ;-)

Delfos, Jacob schrieb:

> I tried that before, using tfw and wld. Neither worked.....
> 
> -----Original Message-----
> From: Pericles S. Nacionales [mailto:nacional at cbs.umn.edu] 
> Sent: Wednesday, 19 May 2004 2:42 PM
> To: Marvin Humphrey
> Cc: mapserver-users at lists.gis.umn.edu
> Subject: Re: [Mapserver-users] MapServer/gdal doesn't like Photoshop tiff
> 
> 
> This happens because photoshop doesn't support GeoTIFF images.  When you
> open the GeoTIFF image in Photoshop and then save it again, you lose the
> georeferencing.  What you can do to fix it is create what's called a world
> file.  This is a small text file with the following lines (this is only
> valid for the example 1.5 image): 0.00473306 0.0 0.0 -0.00473306 -97.3743368
> 49.415919
> 
> If you copy these lines to a text editor and save the file as
> mod09a12003161_ugl_ll_8bit.tfw in the same directory where you have your
> tiff image, your map should then work.  To explain the lines briefly: line 1
> represents the X dimension of your pixel (in map units) I don't really know
> what lines 2 and 3 are (don't change it unless you know what you're doing)
> line 4 is the negative Y dimension of your pixel (it has to be negative)
> line 5 is the upper left X coordinate of the image line 6 is the upper left
> Y coordinate of the image
> 
> You can get these info if you have the GDAL utility program "gdalinfo". 
> Go ahead and use photoshop to edit the images but make sure to get the pixel
> dimensions and upper left coordinates of the image before doing so.
> 
> Good luck!
> -Perry
> 
> On Tue, 2004-05-18 at 23:00, Marvin Humphrey wrote:
> 
>>Greetings,
>>
>>Problem:  I load the mapserver tutorial at
>>http://terrasip.gis.umn.edu/projects/tutorial/ .  I take the tiff 
>>source used for example1-5.map, scp it off from the FreeBSD 4.9 box 
>>running MapServer to a Mac OS X 10.3 box running Photoshop 7.0 and 
>>resave it without editing.  After scp'ing it back, MapServer doesn't 
>>process it anymore -- vector data displays when I load example1-5, but 
>>raster data is missing, and the display happens fast enough to suggest 
>>that MapServer is simply rejecting the file rather than misinterpreting 
>>its contents on a pixel-by-pixel basis.
>>(My eventual goal is to take other raster sources (specifically GLOBE 
>>datafiles), turn them into tiffs and process them.  This 
>>save-with-no-changes operation is for troubleshooting.)
>>
>>I've been through debugging the conflict between the internal tiff
>>support and gdal.  (How about making --with-tiff and --with-gdal an 
>>illegal compile combination?).  MapServer has been recompiled 
>>--without-tiff.  Here's my config:
>>
>># ./mapserv40 -v
>>MapServer version 4.0.2 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
>>SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT 
>>SUPPORTS=WFS_SERVER INPUT=EPPL7 INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
>>
>>gdal (version 1.2.0) has tiff support, since gtiff is in this list:
>>
>># gdal-config --formats
>>gxf gtiff hfa aigrid aaigrid ceos ceos2 iso8211 xpm sdts raw dted mem
>>jdem envisat elas fit vrt usgsdem l1b nitf bmp pcidsk bsb gif jpeg png
>>
>>tiffinfo has this to say about the original image from the tutorial...
>>
>># tiffinfo mod09a12003161_ugl_ll_8bit.tif
>>mod09a12003161_ugl_ll_8bit.tif: Warning, unknown field with tag 33550
>>(0x830e) ignored.
>>mod09a12003161_ugl_ll_8bit.tif: Warning, unknown field with tag 33922 
>>(0x8482) ignored.
>>mod09a12003161_ugl_ll_8bit.tif: Warning, unknown field with tag 34735 
>>(0x87af) ignored.
>>mod09a12003161_ugl_ll_8bit.tif: Warning, unknown field with tag 34737 
>>(0x87b1) ignored.
>>TIFF Directory at offset 0x1152f68
>>   Image Width: 3480 Image Length: 1740
>>   Resolution: 1, 1 (unitless)
>>   Bits/Sample: 8
>>   Sample Format: unsigned integer
>>   Compression Scheme: None
>>   Photometric Interpretation: RGB color
>>   Software: "ERDAS IMAGINE"
>>   Samples/Pixel: 3
>>   Rows/Strip: 8
>>   Planar Configuration: single image plane
>>
>>... and this to say about the copy...
>>
>># tiffinfo mod09a12003161_ugl_ll_8bit_mild.tif
>>mod09a12003161_ugl_ll_8bit_mild.tif: Warning, unknown field with tag
>>700 (0x2bc) ignored.
>>mod09a12003161_ugl_ll_8bit_mild.tif: Warning, unknown field with tag 
>>34665 (0x8769) ignored.
>>TIFF Directory at offset 0x8
>>   Subfile Type: (0 = 0x0)
>>   Image Width: 3480 Image Length: 1740
>>   Resolution: 72, 72 pixels/inch
>>   Bits/Sample: 8
>>   Compression Scheme: None
>>   Photometric Interpretation: RGB color
>>   Date & Time: "2004:05:18 19:26:44"
>>   Software: "Adobe Photoshop 7.0"
>>   Samples/Pixel: 3
>>   Rows/Strip: 1740
>>   Planar Configuration: single image plane
>>   Photoshop Data: <present>, 9182 bytes
>>
>>What is it about the Photoshop tiff that MapServer or gdal doesn't
>>like?  It is an 8-bit-per-channel image, just like the original.  All 
>>image-previews are disabled and ICC profile is not embedded (not that 
>>any of that should matter).  Contrary to some reports I have unearthed 
>>while googling the mail archives, MapServer does not require an 
>>indexed-color 8-bit-per-pixel tiff -- because this original is a 
>>straight-up 24-bit RGB (3-channel x 8-bits-per-channel = 24-bits-per 
>>pixel) image! (I imagine that MapServer must choke on 
>>16-bit-per-channel images, like the 16-bit greyscale of GLOBE files, or 
>>the 48-bit RGB files used in high-end scanning and image-manipulation.)
>>
>>  The problem can't possibly be something as straightforward as
>>byte-order, can it?
>>
>>-- Marvin Humphrey
>>
>>_______________________________________________
>>Mapserver-users mailing list Mapserver-users at lists.gis.umn.edu
>>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users

-- 

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-----

Dipl. Geogr. Till Adams
terrestris, Paulsen&Adams GbR
Siemensstr. 8 * 53121 Bonn
Tel.: 0228 962 899 52 * Fax.: 0228 962 899 57
info at terrestris.de * www.terrestris.de