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Woods Hole Coastal and Marine Science Center

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Define corners

Define Corner Points -- In the main "SeaGrid" window, click on four points with mouse button #1 to define the grid boundary approximately. Once established, the corner points can be refined by dragging with mouse button #1. The starting corner point, marked by an asterisk (*), can be rolled counter-clockwise to the next corner by selecting the "View/Roll" menu item. Edge #1 follows counterclockwise from the (*) to the next corner. Edge #2 is the next one along. Grid-cell spacings are determined along those two edges. (See "spacer" steps below.)

Add edge points

Add Edge Points -- By clicking with mouse button #1 on any edge, a point can be added and dragged to a new position, thereby reshaping the grid boundary. Any number of edge points can be added. An edge point can be deleted by clicking on it with mouse button #3. If the updated boundary becomes too distorted for the conformal mapping method that is used here, a message will request that the boundary be reshaped.


Zoom -- Zooming can be accomplished by clicking mouse button #1 on white-space (center and zoom-in x2), or by stretching out a rectangular fence, to which the plot will be zoomed. Clicking with mouse button #2 zooms out. Mouse button #3 centers the clicked point. Double-clicking resizes the plot to fit the window.

Selecting the view

Setup Dialog -- Select the View/Setup..." menu item. Change the grid-sizes to 20 and 30 ("Cells Edge 1" and "Cells Edge 2", respectively).

Submit screen

Submit -- Click "Okay" to submit the dialog and witness the grid being recomputed and drawn with the new grid counts.

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