Hiya Rob, Sounds like you are doing well at manipulating the data for your needs. The data is stored in the returned array such that 0,0 is in lower left corner of the grid(bounding box). The length of the rows is Nx and the length of the columns is Ny for the complete grid. For some reason, I can't find the reference in the documentation but if you need more detail, I'll look further. RObb... Ticket Details =================== Ticket ID: HMB-497600 Department: Support netCDF Java Priority: Normal Status: Open