I have several grid files, it is generated by raw multibeam data, for quick review data quality and know the area information, I always export xyz then grid to GRD files.
I know the surfer can specify the Z range when grid xyz data( Grid-->data ), but sometime I will get some GRDs generated by GMT, so that I need to delate spike points. It is too waste time convert GRD to xyz, then re-converter to GRD by surfer. Does anyone know how to filter the fix Z range in grid file directly?
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