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

Wed Apr 19 06:31:36 PDT 2017

Hi David, Hi list,

@David: you said "Well QGIS does show just a black image"

I assume that this is just a layer-specific contrast setting. Maybe just play around with stretching (layer properties -> style -> band rendering), e.g. set "min" to "0" and "max" to "255" (per each band) and then set "contrast enhancement" to "stretch to minmax"

Regards Ben

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-----Ursprüngliche Nachricht-----
Von: mapserver-users [mailto:mapserver-users-bounces at lists.osgeo.org] Im Auftrag von David
Gesendet: Dienstag, 18. April 2017 18:01
An: 'mapserver-users at lists.osgeo.org'
Betreff: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms

So, i did some testing.

The wms is not serving the images with float32 as data type. It shows the same issue, false colors.
The wcs is working and serving the float32 data type data.
For my use-case setting the MAXSIZE higher than the tile dimension was important.

Well QGIS does show just a black image, but GlobalMapper is loading the data.

Just out of curiosity, can somebody explain "WCS_SIZE" "..." to me? Is this the size in pixel x y for the complete TILE_INDEX?

David

------ Original Message ------From: "David" <david at impstyle.com>
To: "'mapserver-users at lists.osgeo.org'" 
<mapserver-users at lists.osgeo.org>
Sent: 4/18/2017 11:07:04 AM
Subject: Re[2]: [mapserver-users] geotiff 48bit with mapserver 7 wms

>Hi Cora,
>
>do you use PROCESSING "SCALE=AUTO" with you LAYER definition?
>
>SCALE[_n]=AUTO or min,max
>This directive instructs the GDAL reader to pre-scale the incoming 
>raster data. It is primarily used to scale 16bit or floating point data 
>to the range 0-255, but can also be used to constrast stretch 8bit 
>data.
>
>http://mapserver.org/input/raster.html#special-processing-directives
>
>Cheers David
>
>
>------ Original Message ------
>From: "Berger, Cora" <cora.berger at bezreg-koeln.nrw.de>
>To: "'mapserver-users at lists.osgeo.org'" 
><mapserver-users at lists.osgeo.org>
>Sent: 4/18/2017 10:47:42 AM
>Subject: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms
>
>>Dear David, Steve, Ben, etc.
>>I am working with MapServer-WCS. I still have problems defining the 
>>correct output formats. Input to most of our WCS are 8bit Geotiffs.
>>The MapServer WCS-output is either tiff, png or jpeg with 24bit or 
>>Png;mode=8bit with 8 bit (if no output format is defined). The 
>>png;mode=8bit-format changes the imagecolours, so it isn't really 
>>useful. I can't get a colored 8bit Geotiff as output (a 
>>8bit-definition always results in greyscale images). I tried different 
>>output format-definitions, none of them worked. I can define a palette 
>>for the png-format, but unfortunately not for any other format.
>>For our WCS it is important that the output-data looks the same like 
>>the input-data. It seems that at the moment MapServer can't just pass 
>>the input-data through... This might be a GDAL issue...
>>
>>So if you find a way to define your wished output-format, please share 
>>it, maybe it helps me, too. Maybe anybody else has an idea?
>>
>>Cora
>>
>>
>>>Message: 1
>>>Date: Mon, 17 Apr 2017 22:14:28 +0000
>>>From: David <david at impstyle.com>
>>>To: mapserver-users at lists.osgeo.org
>>>Subject: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms
>>>Message-ID: 
>>><em46e35a97-ef4b-4c1a-83bd-bfc62776fa9c at laptop-dfriedrich>
>>>Content-Type: text/plain; format=flowed; charset=utf-8
>>>
>>>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
>>>>>>>
>>>>>>>>Send mapserver-users mailing list submissions to
>>>>>>>>   mapserver-users at lists.osgeo.org
>>>>>>>>
>>>>>>>>To subscribe or unsubscribe via the World Wide Web, visit
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>>>>>>>>or, via email, send a message with subject or body 'help' to
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>>>>>>>>
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>>>>>>>>
>>>>>>>>When replying, please edit your Subject line so it is more 
>>>>>>>>specific than "Re: Contents of mapserver-users digest..."
>>>>>>>>
>>>>>>>>
>>>>>>>>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...
>>>>>>>>URL:
>>>>>>>><http://lists.osgeo.org/pipermail/mapserver-
>>>users/attachments/20170412/2cded6b6/attachment-0001.html>
>>>>>>>>
>>>>>>>>
>>******************************
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