Apple announced new features coming to Apple Maps at their Worldwide Developers Conference earlier this week.
Said features include the rebuilt map data previously announced for iOS 12 (previously: Apple Maps Data Being Completely Rebuilt for iOS 12; A Look at the Rebuilt Apple Maps) but, as they announced this week, will be available across the United States by the end of 2019, and in other countries in 2020 (see press release).
Properly new in iOS 13 is Look Around, a feature similar to Street View in that it presents a three-dimensional street-level imagery, but with what appears to be a slightly different user interface (9to5Mac).
Other features announced include favourites, sharing and other items you’d expect from an online map service: Apple is essentially doing its best to catch up and be as feature-complete as the competition. That includes upgrades to MapKit, their developer toolkit (previously).
More coverage: MacRumors, Mashable, USA Today. The maps section of the WWDC keynote starts at around 35:10.