From August 9, 2013, the Google is going to discontinued Latitude program on Google Maps for Android, Latitude for iPhone, the Latitude API and the Latitude website at maps.google.com/latitude.
After August 9, 2013, Google users will no longer be able to share their location through Latitude.
All users of Google Latitude got this mail :
Earlier today, we announced that Google Latitude is no longer part of the Google Maps app, and we’re retiring Latitude on August 9, 2013.
This means that after August 9, your Latitude friends list will be deleted and you’ll lose the ability to share your location with them. There will also be some changes to Location Reporting and Location History, including changes to third-party applications that use Google Latitude. Please see our FAQs for more information.
We understand some of you still want to see your friends and family on a map, which is why we’ve added location sharing to Google+ for Android (coming soon to iOS).
Thank you for using Google Latitude.
The Google Latitude Team
After read this mail we can think that Google want to promote g plus.Google want that who use maps also use g plus.