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Figure 1: . Set Model Projection.
For example, we select the Geographic (Longitude/Latitude) option, then click the OK button, and the Coordinate System form will close. If we want to create a new model from multiple grids with the same coordinate system, we can check the checkbox "Use the same projection for all grids". After selecting Model Projection, we can import a grid from a file by clicking the Import Grids button. The Import Grid form will then pop up; from this form, we select grid type and then select the grid file by clicking the browse button. If we want to import multiple grids at once, we can check the checkbox "Multiple Grid Files.", as shown in Figure 2.
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Figure 2: . Import girds.
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Figure 3: . Grid and Model Projection have the same projection.
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Figure 4: . Grid and Model Projection have different projections.
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Figure 5: . Access Project Settings.
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Figure 6: . Access Project Settings.
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Figure 7: . Access Project Settings.
There are five reference coordinate systems as below:
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Figure 8: . Define coordinate system with projection parameters based on UTM and WGS 84.
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Figure 9: . Define projection by importing a *.prj file.
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Figure 10 shows a dialog that allows users to download projection information from the Internet using an EPSG code. EPSG codes for different coordinate systems can be found at https://epsg.io or https://spatialreference.org. The EPSG codes for the projection information for UTM zones have the form EPSG:326xx. For example, the EPSG code for UTM Zone 10 is EPSG:32610, so users can enter the value of 32610 into the search box to download its projection information.
Figure 10: . Define projection using EPSG Code.
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Besides the Coordinate Projection tab, the Project Settings form has General, and Default Precisions. General tab allows setting unit system for the model. While The default Precisions tab allows the precision of parameters in the model to be set, as shown in Figure 8 and Figure 12.
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Figure 11: . Project Settings: General tab.
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Figure 12: . Project Settings: Default Precision tab.
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