[mapserver-users] Problems serving GeoTifs as .bil

[Jeff McKenna]

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 
>