It has been recently confirmed that Apple has acquired GPS technology firm Coherent Navigation. While it is unclear as to why exactly Apple has acquired the company, based on what the firm does it is pretty obvious that the technology will most likely be integrated into Apple Maps to help further improve upon its accuracy.
For those unfamiliar, Coherent Navigation is a firm that specializes in high-precision GPS. This is not your standard GPS as what it does is that it takes your standard GPS data and data from the Iridium satellite communications constellation to help provide even more precise GPS. It has been used in numerous projects by the US government which includes military location technologies.
Given that the acquisition is rather recent it is unclear if Apple will have enough time to integrate the technology into Apple Maps ahead of WWDC 2015 which takes place next month, but hopefully Apple will have further updates on Apple Maps to share during the event.