Grid+ uses a native grid file with the extension *.gpc. Besides this, it can also load various other types of grids, such as *.cvl (grid file made by CVLGrid) and *.grd (grid file made by Delft3D). To load a grid file, click the Import file button from the main toolbar, then select Import Grid, as shown in Figure 1. 2224882112. A native Grid+ @.gpc file can also be dragged and dropped onto the layer menu on the left of the form.
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Figure 1 Importing a grid file.
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When selecting the Import Grid option, the Import Grid form will pop up, as shown in Figure 2 2224882112. We browse to the grid file. We can select many types of grids by clicking on the down arrow in the form. After selecting a grid file, click the Open button to load the file. After clicking the Open button, then the Coordinate System form will be displayed, as shown in Figure 3 2224882112. It is necessary to define the correct coordinate system for the grid. Select either the Geographic system or UTM system, then click the OK button. If the wrong coordinate system is selected, the grid will be located in the incorrect location. It is then necessary to load the grid again and save it with another coordinate system.
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