Need help in regard to applying a projection to a shapefile

Discussion created by mengde on Feb 18, 2013
Latest reply on Feb 19, 2013 by MKennedy-esristaff
I'm trying to apply a projection to a shapefile, and I can't get it to work. I don't have the slightest clue what projection this data has. It encompasses everywhere from eastern Africa east until western Mexico. When I make the data frame WGS 1984, the full extent's scale is approximately 1:12 trillion, so I know something is obviously wrong. It's not just a matter of defining the projection in ArcCatalog, because all that did was create another error for me regarding the extent not being consistent with the projection. I'm at a loss about what to do with this.