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PCCC GIS I Exercise 2 (AV9.1) - Locate your car with GPS, map it with GIS v2, Apr 2007 - page 17 / 31

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A Spatial Reference Properties window appears:

  • Press Select (above left) > Geographic Coordinate Systems; press Add (above right)

In the window that follows (below left), dbl-click on North America (red arrow)

  • Select North American Datum 1983.prj (above right); press Add.

T h i s c o o r d i n a t e s y s t e m b e c o m e s G C S _ N o r t h _ A m e r i c a n _ 1 9 8 3 ( b e l o w l e f t ) ; p r e s s O K .

The Define Projection window returns (above right) and confirms the change. Press OK, then Close after confirming the operation is “completed”, then Cancel if necessary.

  • Repeat the above “define projection” steps for the second shapefile (county_boundary).

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