I am just about done with my shapefile in QGIS, but I needed help saving my shapefile as a .prj file. (If that is possible). If not, how do I obtain the .prj file for my shapefile?
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.prj file is a non-mandatory file for group of files generally called as Shapefile. Mandatory files are: .shp, .shx and .dbf
Citing wikipedia: .prj — projection format; the coordinate system and projection information, a plain text file describing the projection using well-known text format
In QGIS you can create .prj file through menu:
Vector - Data Management Tools - Define Current Projection...
If you choose projection for your file and click ok, it will create .prj file for your shapefile.