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" <[email protected]>
To: "'[email protected]'"
<[email protected]>
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" <[email protected]>
To: "'[email protected]'"
<[email protected]>
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 <[email protected]>
To: [email protected]
Subject: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms
Message-ID:
<em46e35a97-ef4b-4c1a-83bd-bfc62776fa9c@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" <[email protected]>
To: [email protected]
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
<[email protected]> 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: [email protected]
To: [email protected]
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)
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Woodbridge)
----------------------------------------------------------------------
Message: 1
Date: Wed, 12 Apr 2017 00:22:12 +0000
From: David <[email protected]>
To: [email protected]
Subject: [mapserver-users] geotiff 48bit with mapserver 7 wms
Message-ID:
<em5ce0e1b3-00b1-463e-8ad8-90100518d131@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
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