[mapserver-users] How to serve individual RAW binary Bands fromWCS as floating point geotiff

[Peter Willis]

Hello,

Interesting... The documentation indicates:

&RangeSubset=contents:nearest[Band[120]]

I tried what you suggest but continue to have the same problem.
The mapserver *did not* complain about '&RESAMPLE=BILINEAR&Band=120'
so I guess we can assume that those parameters work.

Peter


Rahkonen Jukka wrote:
> Hi,
> 
> I have never used this myself: &RangeSubset=contents:nearest[Band[120]]
> Is that WCS 1.0.0 parameter?  For selecting bands from WCS 1.0.0 service I have been using something like 
> &RESAMPLE=BILINEAR&Band=4
> 
> -Jukka Rahkonen-
> 
> 
> -----Alkuperäinen viesti-----
> Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: Peter Willis
> Lähetetty: pe 29.1.2010 0:26
> Vastaanottaja: mapserver-users at lists.osgeo.org
> Aihe: Re: [mapserver-users] How to serve individual RAW binary Bands fromWCS as floating point geotiff
>  
> Hello,
> 
> The definition of GEOTIFF_FLOAT is as follows:
> 
> OUTPUTFORMAT
>    NAME GEOTIFF_FLOAT
>    DRIVER "GDAL/GTiff"
>    MIMETYPE "application/octet-stream"
>    IMAGEMODE FLOAT32
> END
> 
> I Added the MIMETYPE as shown to ensure that web browsers
> would ask to save the file rather than just open it in an
> image viewer from a temp file. (MS Windows...)
> 
> That part works fine.
> 
> 
> Mostly I am concerned with extracting a specific 'band'
> from the multi-band file. The server serves floating point
> geotiff just fine.
> 
> Peter
> 
> 
> Rahkonen Jukka wrote:
>> Hi,
>>
>> How have you defined the OUTPUTFORMAT for GEOTIFF_FLOAT?
>>
>> -Jukka Rahkonen-
>>
>>
>> Peter Willis wrote:
>>
>>  
>>> Hello,
>>> I have been setting up a WCS map file for mapserver.
>>> PROBLEM:
>>> Problems arise when rasters are defined
>>> as follows:
>> LAYER
>>    NAME SomeDataChannel120
>>    STATUS OFF
>>    DEBUG ON
>>    TYPE RASTER ### required
>>    PROCESSING "BANDS=120"
>>    METADATA
>>      "wcs_label"           "Data/stuff"
>>      "wcs_rangeset_name"   'bands'
>>      "wcs_rangeset_label"  "Stuff thats mapped"
>>      "ows_extent" '-135 55 -121 46'
>>      "wcs_resolution" '0.08333333333333332 -0.083333333333333332'
>>      "ows_srs" 'EPSG:4326'
>>      "wcs_srs" 'EPSG:4326'
>>      "wcs_formats" 'GEOTIFF_FLOAT,GEOTIFF_INT16'
>>      "wcs_nativeformat" 'ENVI'
>> #    "wcs_bandcount" '563'
>>      "wcs_rangeset_axes" 'bands'
>>    END
>>    DATA /data/stuff.img
>>    PROJECTION
>>      "init=epsg:4623"
>>    END
>>    DUMP TRUE ### required
>> END
>>
>>
>> I have  'wcs_bandcount'  commented out because mapserver
>> causes an internal error in the web server if I define the
>> band count.
>>
>> I get floating point geotiff served with the following client request:
>> http://sparky.com/cgi-bin/wcs?REQUEST=GetCoverage&SERVICE=WCS&VERSION=1.0.0&COVERAGE=SomeDataChannel120&CRS=EPSG:4326&BBOX=-135,55,-121,46&WIDTH=432&HEIGHT=216&FORMAT=GEOTIFF_FLOAT&RangeSubset=contents:nearest[Band[120]]
>>
>> ..however, I always only get the first band from the img file....
>>
>>
>> QUESTIONS:
>>
>> Is there a problem with this setup?
>>
>> Do I need to define each band as a layer in the mapfile
>> or will mapserver WCS allow the client to request a single
>> channel?
>>
>> Thanks for any enlightenment,
>>
>> Peter
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> 
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