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After opening Grid+1.0, left-mouse-click (LMC) on the Import from a file button in the main toolbar and select Import Overlay in the drop-down menu. Figure 1
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Figure 1. Importing overlay file.
In the pop-up Import Over Layer window, go to the directory where the overlay file is saved the select and open the Shoreline.p2d file. Before the shoreline is displayed, indicating the coordinate system is required. For the New York Harbor, the coordinate system, or projection, is UTM Zone 18 in the Northern Hemisphere (Figure 2).
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Figure 2. Loading overlay file.
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Grid+1.0 shows the imported shoreline as in Figure 3. To check is the shoreline overlays the correct area in the background map, turn on the background map by clicking the lightbulb icon on its layer.
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