Hi Benjamin,
thank you for your tip. QGIS renders the tiles if a set min/max and
"stretch to min/max".
I did the test with a smaller data set (200 tiles 130MB each).
My problem now is, with all tiles (~18500) the connection times out,
even with small bounding boxes like:
http://192.168.3.231/?MAP=/maps/MAP/eowcs2.map&&SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GEOTIFF&COVERAGE=test&BBOX=646021,5524001,648018,5525998&CRS=EPSG:32718&RESPONSE_CRS=EPSG:32718&WIDTH=4000&HEIGHT=4000
(QGIS always uses the full extent as bbox for the query and times out.
Even zoomed in. *sick*)
The same data set as WMS, with MINSCALEDENOM MAXSCALEDENOM runs very
smooth.
I did not find very much help regarding performance improvements and
mapserver. For WMS you find alot.
Cheers,
David
------ Original Message ------
From: "Schepers, Benjamin" <[email protected]>
To: "'[email protected]'"
<[email protected]>
Sent: 4/19/2017 10:31:36 AM
Subject: Re: [mapserver-users] geotiff 48bit with mapserver 7 wms
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:[email protected]]
Im Auftrag von David
Gesendet: Dienstag, 18. April 2017 18:01
An: '[email protected]'
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" <[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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1. geotiff 48bit with mapserver 7 wms (David)
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----------------------------------------------------------------
------
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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