I have a data file, with "projectedz" field, which is supposed to be ground elevation. THis elevation is recorded in meters, but I need feet. If I convert this elevation to feet, but multiplying the z by 3.28084, I get an elevation that should be similar to what my usgs quad map shows. I am consistently off 80-90 feet from my calculated elevation, to the quad elevation. IE....if I see a point on a quad marked 400', my calculated point is 320. Is my conversion correct? Shouldn't I simply do the multiplication like i mentioned to get feet? Just looking for confirmation that what I am doing is correct.