View Source OpenRtbEcto.V2.BidRequest.Geo (OpenRtbEcto v1.1.0)
This object encapsulates various methods for specifying a geographic location. When subordinate to a Device object, it indicates the location of the device which can also be interpreted as the user’s current location. When subordinate to a User object, it indicates the location of the user’s home base (i.e., not necessarily their current location).
The lat/lon attributes should only be passed if they conform to the accuracy depicted in the type attribute. For example, the centroid of a geographic region such as postal code should not be passed.