[mapserver-users] grayscale shaded relief in mapserver

[Jeff McKenna]

my thoughts:

- make a tiny version of your mapfile with only that one problem layer
- remove all projection objects
- post this small mapfile and your shp2img output (with the -map_debug  
switch) to this email list


-jeff




On 21-Apr-08, at 12:34 PM, Guillaume Sueur wrote:

> the main projection is the same. Extents are ok, the tif being much  
> wider than the rest of the dataset. I'm explicitly calling it, and  
> it returns a white image. shp2img on this specific layer does the  
> same.
> The raster values range from 0 to 255, but on my particuliar mapping  
> zone, the are few differences between pixel values. I'm using GIF  
> PC256 for output.
>
>
> Fawcett, David a écrit :
>> Have you ruled out a problem with projection or extent?  I was  
>> hoping to see the top of the map file too, to see what the output  
>> projection, extent, and units lines looked like.  Also, are you  
>> calling the layer name explicitly in the cgi request?  If not, try  
>> setting the layer status to DEFAULT for testing purposes.
>> David.
>> -----Original Message-----
>> From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org 
>> ] On Behalf Of Guillaume Sueur
>> Sent: Monday, April 21, 2008 11:17 AM
>> To: Fawcett, David; mapserver-users at lists.osgeo.org
>> Subject: Re: [mapserver-users] grayscale shaded relief in mapserver
>> the TIF goes with a .TAB and its georeferencing informations. It  
>> looks ok with Qgis.
>> The mapfile is straight-forward :
>>  LAYER
>>      DATA "uploaded/AUbwV8_32.TIF"
>>      NAME "shaded"
>>      PROCESSING "COLOR_MATCH_THRESHOLD=3"
>>      PROJECTION
>>        "init=epsg:27563"
>>      END
>>      STATUS ON
>>      TYPE RASTER
>>      UNITS METERS
>> END
>> Thanks for your interest,
>> Guillaume
>> Fawcett, David a écrit :
>>> Have you stripped out all of the projection, etc.  and just tried  
>>> to output the image?
>>>
>>> What does your map file look like?
>>>
>>> David.
>>>
>>> -----Original Message-----
>>> From: mapserver-users-bounces at lists.osgeo.org
>>> [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of  
>>> Guillaume Sueur
>>> Sent: Monday, April 21, 2008 3:48 AM
>>> To: mapserver-users at lists.osgeo.org
>>> Subject: [mapserver-users] grayscale shaded relief in mapserver
>>>
>>>
>>> Hi list,
>>>
>>> I've got a grayscale TIF showing shaded relief which I can't  
>>> manage to
>>> display properly with mapserver. The image is just white. gdalinfo  
>>> gives
>>> : Band 1 Block=4367x1 Type=Byte, ColorInterp=Gray I assume the  
>>> georef is
>>> ok. I tried few things like resampling it to 32 colors, or  
>>> "PROCESSING "COLOR_MATCH_THRESHOLD=3" as I've found in mails  
>>> archives, but without any luck.
>>>
>>> Any clue ?
>>>
>>> Thanks
>>>
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>
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