Yes, if you build a mechanism for the alignment of a building / floorplan against a set geography of latitude and longitude. However you're then asking the user to do this once in additional software/add-on, and once in Dashboard. As a result there is room for error where there doesn't really need to be.
However the Scanning API provides x and y co-ordinates, and the list of floorplans upon which it's seen/present. There is no way to link the Meraki (already geographically aligned floorplan) with these co-ordinates, or (at worst case facilitate upload) without either the pixel-scale of the floorplan supplied, or the a mechanism for obtaining the specific location of the floorplan.