I want to work with a shapefile that is in a Coordinate System that I can't locate in QGIS for Mac. When I load this shapefile data, it shows up fine, on-the-fly has generated the CRS data most likely from the .prj file that has the info in it. However, if I add a coastline from WGS-84 coordinates, or any other data from another coordinate, my data ends up in Africa or even farther than that! So I try to set a coordinate system for it so QGIS will have a reference point. I type in the filter 102631 because that is the number for the Projection data, but that projection isn't listed.
What do I need to do? Can I manually alter something so QGIS has a reference point for this projection data?
The shapefile was created in a NAD-83 Alaska Coordinate System (NAD 1983 StatePlane Alaska 1 FIPS 5001 Feet ESRI 102631 http://spatialreference.org/ref/esri/102631/).
On QGIS for the Mac this coordinate reference system is not listed. How can I correct this on the Mac? Is there a way to download more Projections?