Earlier this year, Apple ceased using Google Maps for its Find My iPhone web app on the beta iCloud.com site in favor of its own Apple Maps, and as of today, the main iCloud.com site has also been updated to utilize an online version of Apple maps.
Though iOS apps like Find My iPhone and Find My Friends began using Apple Maps data shortly after the release of iOS 6, iCloud.com has continued to use Google Maps data up until now.
Apple Maps was highly criticized for its inaccuracy and poor implementation at the time, but since 2012, Apple has made a vast number of improvements to the mapping service and continues to work to this day. Currently, Apple is said to be working on adding indoor mapping and transit features to Apple Maps with iOS 8, but internal politics have allegedly delayed the launch of Maps updates.
Article Link: Apple Transitions 'Find My iPhone' Web Maps for iCloud.com From Google to Apple