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

David david at impstyle.com
Mon Apr 17 15:14:28 PDT 2017 

Thank you very much Steve. You helped me to understand the problem!

David F.

------ Original Message ------
From: "Stephen Woodbridge" <woodbri at swoodbridge.com>
To: mapserver-users at lists.osgeo.org
Sent: 4/14/2017 9:54:20 PM
Subject: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms

>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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>>>>>Today's Topics:
>>>>>
>>>>>    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 --------------
>>>>>An HTML attachment was scrubbed...
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>>>>><http://lists.osgeo.org/pipermail/mapserver-users/attachments/20170412/2cded6b6/attachment-0001.html>
>>>>>
>>>>>
>>>>>------------------------------
>>>>>
>>>>>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
>>>>>>
>>>>>>
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>>>>>>  https://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>>
>>>>>
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