Hi Adam,
If this data is the same referred by your previous email about Transparency issue, I think this is related to the data being JP2 Lossy compressed at the origin.
Quoting my previous answer on this:
As Simone reported in a previous email in reference to JP2 images, there might pixels that “appear”
white but they are not, due to the Lossy JP2 Compression.
Therefore, in the first attached image you may notice some tiny white edges along the region borders.
These are due to the fact that the pixels are not pure whites but something near.
Take a look at the next image. I have checked the RGB values of an “apparently” white pixel (see the red marker).
Actually it is an RGB:249,249,249 whilst pure WHITE is 255,255,255.
So it will not be transparent (also notice all the other “almost white” teeth around on the edge).
Adding a new screenshot showing this between 2 granules (Rosport and Mompach regions) on QGIS
(where I have put WHITE to transparent).
Note that I have remarked with red markers some pixels along the 2 granules edges.
As you can see they are not pure white (due to lossy compression), so you can see the “almost white” edge
between the Rosport and Mompach regions.
Having some masking based on the lossless data or indicating the “valid geometry” would improve the situation by activating the footprintsBehavior.
Hope this helps.
Regards,
Daniele
···
On Fri, Jul 20, 2018 at 11:07 AM, Cecile, Adam <Adam.Cecile@anonymised.com> wrote:
Hello,
I guess it’s coming from a “poor” rendering between the two granule (maybe somehow related to footprint transparency ?) but it makes the rendering kinda lowres…
Is there anyway to ask WMS to “improve” this ?
Best regards, Adam.
____________________________________________________________________________________
Adam Cecile
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