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Multiple Choice

Which file extension stores the shapefile's projection information?

Projection information, or coordinate reference system details, are stored in the separate file that accompanies a shapefile. This file has the .prj extension and contains a text description of the CRS (often in Well-Known Text form). Having the projection data in its own .prj file lets GIS software know how to interpret the coordinates in the shapes so they line up correctly with other layers and real-world locations. The other components have different roles: the .shp file holds the actual geometry of each feature, the .shx file is an index that helps access those shapes quickly, and the .dbf file stores the attribute data for each feature. Because of this division of labor, the projection information lives in its own .prj file.

Projection information, or coordinate reference system details, are stored in the separate file that accompanies a shapefile. This file has the .prj extension and contains a text description of the CRS (often in Well-Known Text form). Having the projection data in its own .prj file lets GIS software know how to interpret the coordinates in the shapes so they line up correctly with other layers and real-world locations.

The other components have different roles: the .shp file holds the actual geometry of each feature, the .shx file is an index that helps access those shapes quickly, and the .dbf file stores the attribute data for each feature. Because of this division of labor, the projection information lives in its own .prj file.