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GeoTIFF will not be displayed correct

#1

Hi,
I’m using GeoTIFF with JPEG Compression and the colors are not well displayed.
First you see the correct picture in IrfanView

Zwischenablage01.png1155×720 1.05 MB

This is displayed with MapSuite like that picture

Zwischenablage02.png1274×749 594 KB

In former version there was now color changing.
I’m using …Layers.GeoTIFF v11.0.0-beta019

Regards
Hardy

#2

Hi Hardy,

It looks we don’t have the test data for GeoTIFF with JPEG Compression, could you please upload a sample data, so our developer can look into it?

Regards,

Ethan

#3

Hi Ethan,

the GeoTIFF is about 33MB.
How can I upload this file?
Regards
Hardy

#4

Hi Hardy,

You can upload to our FTP, if you don’t have the account you can contact your sales to create one.

And you can also upload it in an old ticket, I think 33MB should be OK.

Or you can share it via netdisk, I am not sure whether I can access the share link but I will try.

Regards,

Ethan

#5

Hi Ethan,

I have uploaded the GeoTIFF with http://clients.thinkgeo.com

You’ll find a zip with *.tif and *.tfw.

Regards
Hardy

#6

Hi Hardy,

I had reproduced it, our developer will look into it.

Any update I will let you know.

Regards,

Ethan

#7

Hi Hardy,

I am not sure which result is correct now.

When our developer view the render logic we found why our map render like this is because we read the alpha value for each pixel and all of them aren’t 255, if we hard code it equal 255 the result just render clear.

image.png781×640 736 KB

After that I did a test based on other utility:

Qgis 3.4.4: It just the same like your first image

image.png1538×854 1.46 MB

GeoViewer(LIZARDTECH): It render the same as ours

image.png1918×1036 1.42 MB

Windows Photo Viewer:
In high level it render like the first image, but after zoom in it render like ours:

image.png1050×746 1.11 MB

image.png1050×745 1.06 MB

Now I am confused, our developer will do further research about it, any update I will let you know.

Regards,

Ethan

#8

Hi Hardy,

Our developer research related documentations and read some code for example the libtiff from OSGeo, we think the screen shot as below should the correct result.

image.png741×517 735 KB

Please upgrade your package to the latest version, and it should works.

Regards,

Ethan

#9

Ethan,
thanks for your support.
It’s working…

Regards
Hardy

#10

Hi Hardy,

I am glad to hear that works.

Any question please let us know.

Regards,

Ethan