A nice trick I use to test outputformats is using shp2img with the "-i"
switch, so:

  shp2img -m mine.map -o ttt.bil -map_debug 3 -i bil16


-jeff


-- 
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/



On 2013-04-12 3:55 PM, Evans, James R Civ USAF ACC 84 RADES/SCZE wrote:
> 
> Hi, 
> I'm having bad results trying serve elevation data from GMTED2010 geotifs as 
> .bil.  On the client side, the file I get is the right size, however only the 
> low byte of the 16 bit word has any values.  The high 8 bits are always zero. 
>  That has the effect of making all of my elevations appear to be between 0 
> and 255 meters.  If I try to download the data as 32 bit tifs, it works fine. 
>  Unfortunately, my client app is looking for .bils.  Here's the start of my 
> map file.  I'm using the MS4W latest released version.  Any help would be 
> appreciated! 
> Thanks, 
> James 
> 
> Here's what one of my requests looks like: 
> http://localhost/cgi-bin/gmted.exe?service=WMS&request=GetMap&version=1.1.1&srs=EPSG:4326&layers=GMTED&styles=&format=image/bil&width=150&height=150&bbox=-120.0,30.0,-100.0,50.0&;
> 
> 
> 
> Start of my Map file: 
> 
> MAP 
>   NAME "GMTED" 
>   EXTENT -180 -90 180 90 
>   SIZE 512 512 
>   UNITS DD 
>   IMAGETYPE image/bil 
> 
>   PROJECTION 
>     "init=epsg:4326" 
>   END 
> 
>   OUTPUTFORMAT 
>     NAME "asc" 
>     DRIVER "GDAL/AAIGrid" 
>     MIMETYPE "application/asc" 
>     EXTENSION "asc" 
>     IMAGEMODE INT16 
>   END 
> 
>   OUTPUTFORMAT 
>     NAME "bil" 
>     DRIVER "GDAL/EHdr" 
>     MIMETYPE "image/bil" 
>     EXTENSION "bil" 
>     IMAGEMODE INT16 
>   END 
> 
>   OUTPUTFORMAT 
>     NAME "bil16" 
>     DRIVER "GDAL/EHdr" 
>     MIMETYPE "application/bil16" 
>     EXTENSION "bil" 
>     IMAGEMODE INT16 
>   END 
> 
>   OUTPUTFORMAT 
>     NAME "tif" 
>     DRIVER "GDAL/GTiff" 
>     MIMETYPE "image/tiff" 
>     EXTENSION "tif" 
>     IMAGEMODE FLOAT32 
>   END 
> 
>   WEB 
>     METADATA 
>       wms_title "GMTED Terrain" 
>       wms_srs "EPSG:4326 EPSG:900913" 
>       ows_onlineresource "http://localhost/cgi-bin/GMTED"; 
>       ows_enable_request "*" 
>     END 
>   END 
> 

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