We do not discount the possibility that such a metaphor can be cognitively active in speakers using temporal adpositions; in fact, there is considerable evidence that time-as-space metaphors are cross-linguistically pervasive and productive (Lakoff and Johnson, 1980;Núñez and Sweetser, 2006;Casasanto and Boroditsky, 2008).
we do not see much practical benefit to annotating temporal at or topical about as spatial.