I have generated C3 matrix from RADARSAT-2 Quad-pol data. After applying Refined Lee filter I wanted to perform Supervised Wishart Classification. I did Supervised Classification Training and got text file (.txt) with cluster centre value in each element of T3 matrix for all classes. Then, I moved to Supervised Wishar Classification window. As Source Product I chose C3 filtered data. As Training Data Set I chose that text file generated in Supervised Classification Training step.
I got the following SNAP error:
“A problem occurred during the target product initialisation
Type: OperatorException
Message: Supervised-Wishart_classification: C:/Users/…/TC.txt” (the path to text file generated in Supervised Classification Training step.
I saved also whole details report if it’s needed to solve the problem.
I have started now with Supervised Wishart Classification for Sentinel 1 dual pol products (SLC) and I have the same problem with the Training data set txt… Did you find a solution at the end??
I have also been trying to apply the supervised Wishart classification on quad-pol RADARSAT-2 data and I get the same issue.
It seems that a number of users have been reporting this issue and this seems like a bug in the software. One could use PolSARpro although it is not a very user friendly tool and I would like to have this functionality performed with SNAP. Therefore I would like to know from the developers if this issue is being dealt with?
I’m not running into this problem. Could you please provide complete instructions on how to reproduce the problem? What version, OS, data, procedure, etc?
On a QP RS2 SLC product, I calibrate to Sigma0 with complex output.
Create a Freeman Durden or Pauli decomposition to view the scene better.
Create new geometry containers for each class
Draw polygons around training areas and assign them to the geometry containers.
Run Supervised Wishart Training using the Sigma0 product and the vectors from the decomposition product
Run Supervised Wishart Classification using the training file produced in step 5.
Update the colour indexes as appropriate in the colour maninpulation toolview
I have updated to the latest version of SNAP (5.0), S1TBX (5.0.1) and RSTB (7.3.1). However I am still getting this error when running the Supervised Wishart Classification:
“A problem occurred during the target product initialisation
Type: OperatorException
Message: Supervised-Wishart_classification: C:/Users/…/training_cluster_centers.txt.”
Does it work on your side or are you also still getting this error?
I’m trying to classify a Sentinel-1 IW Level-1 SLC Product.
My steps where as follow:
Calibration
Deburts
Subset area of interest
Polarimetric Matrix generation/ Coherency Matrix using C2
New Vector data container
Supervised Classification Training
So far, everything is good. when I ran the next step which is the Supervised Wishart Classification I get an error trying to use the Training Data Set:
Do you get this error? Do you know how can I fix it?
I did the same steps, except for the subset and the vector data. But i didn’t receive any error. I think this tool doesn’t allow for the integration of training data. Supervised in this context just means that a scatterinc type is assigned according to the Wishart chart.