As an executive for a digital mapping technology startup in the innovation’s early days, Bill Kilday has had a front seat in the development of digital navigation that forever changed the way people travel. He was the marketing director of Keyhole, which was bought by Google and eventually gave rise to Google Maps and Google Earth. Now, he is vice president of marketing for Niantic, which was spun out of Google. The company creates augmented reality games using mapping technology such as Pokemon GO and the upcoming Harry Potter: Wizards Unite.  In his book, Never Lost Again: The Google Mapping Revolution That Sparked New Industries and Augmented Our Reality , Kilday provides a behind-the-scenes look at how mapping technology developed. He told the Knowledge at Wharton radio show on SiriusXM  that the industry is still scratching the surface on creative uses of location-based augmented reality. An edited transcript of the conversation follows. Knowledge at Wharton: Tell us about Keyhole.…