I have some AP1131's. These have internal omni-directional antennas, so they are just square boxes with a plastic cover on the top and a mounting bracket on the bottom. I think they are supposed to be mounted upside-down on the ceiling (horizontally), but I'm not sure.
Mine are mounted in the ceiling, but vertically, so the top cover is pointing towards a certain area of the building instead of the floor.
So I'm trying to figure out how to set the "elevation" in the location server maps. I read that 0 degrees means the top cover of the AP points to the right (east), and 180 means it points to the left (west), and 90 degrees means it points down toward the floor. So I think I need to set mine up as 0 degrees or 180 degrees, but how do I tell it that it's pointing north or south?