iPhone 15 Pro and iPhone 15 Pro Max Apple is widely expected to show off iOS 18 during its June 10th WWDC keynote, including new features for many apps, including Safari, Messages, Apple Maps, Apple Music, Calculator, Notes, and more. Joe Rossignol for MacRumors: At least two new Apple Maps features are expected on iOS 18, including custom routes and topographic maps. Custom routes would allow users to choose specific roads to travel on while navigating, while topographic maps include details such as trails, contour lines, elevation, and points of interest for hiking. Topographic maps were added to the Apple Watch with watchOS 10. iOS 18 is expected to add RCS support to the Messages app, which will improve…