Which metadata fields are being used for location?

[waynedwilson]

I have my photo's reverse geocoded using both IPTC and XMP fields, yet when I look at the metadata in Excire, the data is listed in one place but not another place that appears first in the metadata listing.  I wonder where that data is coming from and how I can get it into my photos?  As it is, I cannot search by any of the location metadata.  Attached is a screen shot of what I see.

I have used both Geosetter and a demo version of PhotoMechanic to reverse Geocode.  They both appear to put the metadata is fields the Excire can't search.