Pixel average export fall in circular polygon mask

[mohammadsadeg]

hi. how can i export average of pixels fall in the circular polygon in CSV or text for all bands and use results for regression. i have 166 field point plot with 18 m circular polygon for each point. when i perform export mask pixel in result i have 2000 pixel and it is not creat mean value for each field polygon .
with regards

[abruescas]

If I understand correctly, you want to use a ROI (polygon) to extract a mean value of that area, right? The option you have within SNAP is to use the StatisticsOp processor in gpt mode, with your ROI input as a shape file.

Some hints on GPT:
https://senbox.atlassian.net/wiki/spaces/SNAP/pages/70503475/Bulk+Processing+with+GPT

[marpet]

Yes, Ana is right. The StatisticsOp is probably the right tool for you.
In this thread you can get some guidance:

A StatisticsOp graph

This post shall help to explain how to set up a StatisticsOp graph and what is the meaning of its parameters. An example graph is attached. The StatisticsOp will, unlike other SNAP operators, not create an output product but instead write statistics to either a .csv-file or an ESRI shapefile. Note that this graph works with SNAP 6.0.3. If you work with earlier versions, some of the parameters are not available. First, the StatisticsOp offers two ways to specify source products: Either by settin…

[mohammadsadeg]

thank for your guidance. i also can export values by raster -> export pixel and finally define window size and mean operator on pixels and export to text file and then importing to the excel.