What you can do with Personalized Google Maps:

  • Mark your favorite places on your map
  • Draw lines and shapes to highlight paths and areas
  • Add your own text, photos, and videos
  • Share your map with friends and family

Link:
http://maps.google.com/help/maps/mymaps/create.html

The user guide to Google Maps:
http://maps.google.com/support/bin/answer.py?answer=68480

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