Raster > Geometric Operations > Level-3 Binning


#1

I’m trying to use the Level-3 Binning option to reproject some SLSTR Level-1 images onto to world map. I found that it works OK with Level-2 products as input, but not with Level-1. I just get all NaNs in the output when I use a Level-1 product as input. Is that expected, or should it work with Level-1 data too? It would be very useful to be able to use it with Level-1 data.

Thanks.


#2

Actually it should work with Level-1 data, too.
Do you use the 500m or the 1km option when you open the product, or the native resolution option?

If you just want to reproject you don’t need to use the Binning operation. You can also use the Reprojection.
I just tried binning and reprojection . Both work for me.

Can you tell which product you have used and how your binning configuration looks like?


#3

I think I’m using the native resolution option (its remembering the settings from previous times, and I can’t find where to change it anymore).

The background of what I’m trying to do is: I’d like to read in several L1 granules (e.g. over a whole day) and put them all together into a combined map over the whole globe. As far as I can tell, Reprojection only works on one granule at a time?

I just tried it with the following products:

20170715/S3A_SL_1_RBT____20170715T000953_20170715T001253_20170716T031406_0179_020_045_6599_LN2_O_NT_002.SEN3
20170715/S3A_SL_1_RBT____20170715T000653_20170715T000953_20170716T031254_0179_020_045_6419_LN2_O_NT_002.SEN3

I tried various binning options like:
AVG
Band name = S8_BT_in
weightCoeff = 0.0
outputCounts=false
outputSums=false

Spatial resolution=3km/px -> #Rows = 6680
Valid pixel expression not filled
Supersampling left at default value of 1

Thanks alot


#4

You can clear the remembered decisions in the Options. Tools -> Options -> General -> UI Behaviour and then click on “Show suppressed message dialogs again”

Sure if you want to create a composite the binning makes sense. This wasn’t clear after your first post at least not to me.

Now I was able to reproduce the error.
I will further look into it next week.


#5

I had a look at this and found out that it is related to the multi-size character of SLSTR.
Unfortunately it is only written to the log file why the product has not been processed.
To overcome this the next update will allow to specify the source format. In this case the 500m format can be selected.

Right now it is only possible to specify the format from the command line.

You can configure a template in the GUI and then save the processing parameters to a file.
With this parameter file you can create a graph file. You can add the sourceProductFormat parameter.
As value use Sen3_SLSTRL1B_500m

For more help on the command line you can invoke:

gpt -h

and

gpt Binning -h