[mapserver-users] geotiff 48bit with mapserver 7 wms

Fri Apr 14 17:54:20 PDT 2017

Yeah, technically a geotiff can be any format, but mapserver only 
supports a limit set for band widths.

A new version of Mapcache was just released and it has GDAL support in 
it  and serves WMS, but I'm not sure if it will do what you want.

Sorry, I'm out of ideas on this.

-Steve W

On 4/14/2017 6:56 PM, David F. wrote:
> I did not reply after my latest test, sorry.
> I tried all tiff IMAGEMODE for my data set. None gave me 16 bit at the 
> gis client.
> As far as I understand gtiff is 8 bit.
> The only IMAGEMODE for integer is signed INT16 , which is unfortunately 
> the only supported integer data type. For RGB data unsigned integer is 
> the only integer data type that makes sense. Just if i change the 
> IMAGEMODE to FLOAT32 mapserver will serve more than 8 bit per band.
> I think i will give gdal and float32 bit a try nevertheless it will 
> double the image size.
> Maybe someone else has an idea.
> 
> 
> 
> 
> 
> On April 14, 2017 1:43:09 PM Stephen Woodbridge 
> <woodbri at swoodbridge.com> wrote:
> 
>> http://mapserver.org/mapfile/outputformat.html
>>
>> Why not serve them a GTiff format for qgis?
>>
>> You can define multiple output formats in the mapfile, and let the
>> browser use the 8bit png and have qgis request images in gtiff format.
>>
>> -Steve
>>
>> On 4/13/2017 11:03 AM, David wrote:
>>> Hi Steve,
>>>
>>> thank you very much for your help. The Mapserver is serving the tiles
>>> with the correct RGB values now. The problem is, that it is serving 8
>>> bit per band and not 16 bit.
>>> I need the 16bit because i want to use the wms as a base layer for some
>>> further processing with qgis or another gis client. So no problem
>>> regarding browsers for me.
>>>
>>> I will take a look and change the data type to float32 for the tiff
>>> files. At least this is an supported OUTPUTFORMAT for mapserver.
>>> Any suggestions on this matter are highly appreciated.
>>>
>>> Cheers,
>>> David
>>>
>>> ------ Original Message ------
>>> From: mapserver-users-request at lists.osgeo.org
>>> To: mapserver-users at lists.osgeo.org
>>> Sent: 4/12/2017 4:00:02 PM
>>> Subject: mapserver-users Digest, Vol 111, Issue 5
>>>
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>>>>    1. geotiff 48bit with mapserver 7 wms (David)
>>>>    2. Re: geotiff 48bit with mapserver 7 wms (Stephen Woodbridge)
>>>>
>>>>
>>>> ----------------------------------------------------------------------
>>>>
>>>> Message: 1
>>>> Date: Wed, 12 Apr 2017 00:22:12 +0000
>>>> From: David <david at impstyle.com>
>>>> To: mapserver-users at lists.osgeo.org
>>>> Subject: [mapserver-users] geotiff 48bit with mapserver 7 wms
>>>> Message-ID: <em5ce0e1b3-00b1-463e-8ad8-90100518d131 at laptop-dfriedrich>
>>>> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>>>>
>>>> Hi there,
>>>>
>>>> iam having some trouble to serve 48 bit geotiff images with a mapserver
>>>> 7 wms. I created to layers for speed purposes with scale limiters. The
>>>> lowres layer is served well and looks good, it is 24bit geotiff
>>>> data(8bit per channel). But if the layer changes to the highres, 48bit
>>>> geotiff data(16bit per channel), the data is shown wrong.
>>>> I searched for some hints regarding a similar issue but could not find
>>>> something.
>>>>
>>>> This is a screenshot of the loaded highres layer. It does not matter if
>>>> i load a bbox inside the browser, qgis or another wms client. The
>>>> highres data looks always the same.
>>>>
>>>> image loaded from highres layer:
>>>> http://imgur.com/a/B65cp
>>>>
>>>> the mapfile:
>>>> https://pastebin.com/4G2DZErZ
>>>>
>>>> the gdalinfo for one 16bit 3-band tile:
>>>> https://pastebin.com/kfS0BjmE
>>>>
>>>> Best Regards,
>>>> David
>>>> -------------- next part --------------
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>>>> ------------------------------
>>>>
>>>> Message: 2
>>>> Date: Tue, 11 Apr 2017 21:25:01 -0400
>>>> From: Stephen Woodbridge <woodbri at swoodbridge.com>
>>>> To: mapserver-users at lists.osgeo.org
>>>> Subject: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms
>>>> Message-ID: <a7bc734d-f7b9-32f3-5ce0-6a71aab4ead4 at swoodbridge.com>
>>>> Content-Type: text/plain; charset=utf-8; format=flowed
>>>>
>>>> Read this:
>>>> http://mapserver.org/input/raster.html
>>>>
>>>> You need to add to your highres layer
>>>>
>>>> PROCESSING "SCALE=AUTO"
>>>>
>>>> Or per band scaling. I done thing most browsers know what to do with 16
>>>> bits per channel.
>>>>
>>>> -Steve W
>>>>
>>>> On 4/11/2017 8:22 PM, David wrote:
>>>>>  Hi there,
>>>>>
>>>>>  iam having some trouble to serve 48 bit geotiff images with a 
>>>>> mapserver
>>>>>  7 wms. I created to layers for speed purposes with scale limiters. 
>>>>> The
>>>>>  lowres layer is served well and looks good, it is 24bit geotiff
>>>>>  data(8bit per channel). But if the layer changes to the highres, 
>>>>> 48bit
>>>>>  geotiff data(16bit per channel), the data is shown wrong.
>>>>>  I searched for some hints regarding a similar issue but could not 
>>>>> find
>>>>>  something.
>>>>>
>>>>>  This is a screenshot of the loaded highres layer. It does not 
>>>>> matter if
>>>>>  i load a bbox inside the browser, qgis or another wms client. The
>>>>>  highres data looks always the same.
>>>>>
>>>>>  image loaded from highres layer:
>>>>>  http://imgur.com/a/B65cp
>>>>>
>>>>>  the mapfile:
>>>>>  https://pastebin.com/4G2DZErZ
>>>>>
>>>>>  the gdalinfo for one 16bit 3-band tile:
>>>>>  https://pastebin.com/kfS0BjmE
>>>>>
>>>>>  Best Regards,
>>>>>  David
>>>>>
>>>>>
>>>>>  _______________________________________________
>>>>>  mapserver-users mailing list
>>>>>  mapserver-users at lists.osgeo.org
>>>>>  https://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>
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