Define or Modify the Projection of a Map View
In Oasis montaj, maps have several views that contain information about the map. The coordinate system information for a map is contained in a Data view. Base map information such as North Arrow, Scale Bars, Titles are contained in the Base view.
The coordinate system information is attached to a map view by copying the projection parameters from a dataset or grid. When you create a new map, the system enables you to scan database and grid files and attach their projection and coordinate attributes to a map view.
View the Map View Projection
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To display the projection information for the current map view on an open map, you must first select the View you want to modify.
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Right-click the mouse anywhere in the map window. On the popup menu, click View|Data to select the Data View. Right-click again and select Coordinate System from the popup menu.
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If a projection has been defined for the View, the Coordinate System dialog is displayed showing the projection information for the selected map view.
Modify the Map View Projection
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To modify the projection, click the Modify button in the Coordinate System dialog.
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The system displays the Modify Coordinate System dialog showing the current projection status for the View.
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In the Datum box, select the datum you would like to use from the list. If you are defining a Projected coordinate system, you will also have to select a projection method in the Projection method box.
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In the Local datum transform box, select the local datum you want to use. The box will list the local datums that apply to the datum you previously selected.
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Click the OK button to accept these changes and exit the dialog box.
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