SeaGrid is a Matlab 5.2+ application for generating an orthogonal grid within a curved perimeter, suitable for oceanographic modeling. With SeaGrid, one can: Select a conformal map projection. Manually adjust grid corner points and curved boundaries. Modify the number of grid-cells and grid-line spacings. Compute depths, land-masking, and orthogonality. Save, then later reload a grid for further work. Port a grid to Matlab on another computer. Create SCRUM/ROMS-like and ECOM-like output files. Get comprehensive built-in help.