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Shapefile with both a Projected and Geographic Coord Sys

Question asked by mctraverso on Sep 15, 2015
Latest reply on Sep 17, 2015 by SWalbridge-esristaff

Hi I have a shapefile of census block group boundaries for California from the National Historical GIS website. When I go into Arcmap to check this shapefile's coordinate system.. listed is a USA_Contiguous_Albers_Equal_Area_Conic projection and a NAD 1983 geographic coordinate system. I have to run this shapefile through a spatial allocator tool which uses C and its having projection/coordinate system issues. I normally am only running shapefiles through the tool with one or the other not both. Can someone explain why there would be two? Is there a way to get this shapefile to be one or the other?