File this under 'mildly interesting'. Recently, Nokia pushed out updates for their HERE Maps offline data. Initially thought to be a US only update it became obvious through comments that the update was in fact, global. We pointed out that in our case, three states added up to a 53 MB update, which was much smaller than the initial maps download.
As it turns out, we weren’t imagining things. Nokia’s Pino Bonetti let us know that since the Amber update, the HERE Maps team can in fact update just individual streets instead of having to re-download the entire map for the state or region.