Sometimes I need to check bathymetric or topographic data. A good and fast way to do it is to use SURFER. XYZ data need to be gridded first. Click Grid–>Data and open the file. Select the file you want to… 

In Excel, the maximum worksheet size is 1048576 rows by 16384 columns. It means that large files, typically gridded files are hard to manipulate. https://support.microsoft.com/en-us/office/excel-specifications-and-limits-1672b34d-7043-467e-8e27-269d656771c3 A possible solution is to use SURFER, particularly the worksheet. SURFER is not free and…