Phase Linking Issue #63
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Hi all; I continued to test Sarvey's capabilities. When I tried to run Phase Linking options, the first 3 steps were completed successfully but step 4 caused some error messages. The first one is if I selected kriging method for APS processing, it was frozen and did not continue. Then I tried to change it to apply_aps_filtering: false I got this error message. P.S.: I completed the whole process in Miaplpy and everything went fine.
File "/home/suat/tools/miniforge/envs/sarvey2/bin/sarvey", line 8, in |
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Replies: 5 comments
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Dear @suatcoskun, The error message that you received in Step 4 - Densification might results from the fact that results from Step 3 are not all valid. Could you please provide the following to help understanding your error?
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Ok @Andreas-Piter these are my results;
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Dear @suatcoskun, Thanks for providing the files and figures. The dense point set seems to contain a lot of pixels and interpolating the APS to the points in step 3 might take a while. It might still be a good idea to estimate the APS as your study area is relatively large. For testing, you could reduce the number of points by setting a Recently, I was adding some bugfixes which was related to large number of points. Could you please check if you are using the latest SARvey version (v1.2.0)? Best, Andreas |
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Thank you for quick replay @Andreas-Piter. When I tried to change coherence_p2 value through your advice its done. I added my log file. Note. I used Sarvey 1.2 sarvey_2025-02-24-19-09-29.log One more thing;If I choose the kriging method for the estimate APS my computer memory collapsed so I used linear method. Maybe later you can find to way to process this step with patches. One more question: Which APS model can we use to process stacks with sarvey? |
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Kriging is a computationally heavy procedure as it requires matrix inversion. The matrix size depends on the number of points used for filtering. Despite the higher accuracy of Kriging, I would recommend to use another filtering option for larger datasets. Currently, the available APS filtering options are "linear", "cubic" and "kriging". You can find the options here. |
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Dear @suatcoskun,
Thanks for providing the files and figures.
The dense point set seems to contain a lot of pixels and interpolating the APS to the points in step 3 might take a while. It might still be a good idea to estimate the APS as your study area is relatively large. For testing, you could reduce the number of points by setting a
coherence_p2threshold of 0.9Recently, I was adding some bugfixes which was related to large number of points. Could you please check if you are using the latest SARvey version (v1.2.0)?
Best, Andreas