The best portable GPS units for your car

Boston.com and Blast Magazine tested nine of the latest, greatest portable GPS units to find the easiest way from point A to point B. Reporters often rely on GPS units to deliver themselves to the scene of breaking news. Whether it's in Boston, down the Cape, or west past Worcester, they have to be there, and fast. With that take in mind, the most important thing we looked for was map and address accuracy. Was that side street still there? Was 100 Main St. over here or 3 miles down the road? That was actually a problem with some of the units. We also talked to Jeff Blossom, a senior geographic information systems specialist at Harvard University, for his expert take. Read on. - John M. Guilfoil, Boston.com Correspondent

Boston.com and Blast Magazine tested nine of the latest, greatest portable GPS units to find the easiest way from point A to point B.

Reporters often rely on GPS units to deliver themselves to the scene of breaking news. Whether it's in Boston, down the Cape, or west past Worcester, they have to be there, and fast.

With that take in mind, the most important thing we looked for was map and address accuracy. Was that side street still there? Was 100 Main St. over here or 3 miles down the road? That was actually a problem with some of the units.

We also talked to Jeff Blossom, a senior geographic information systems specialist at Harvard University, for his expert take. Read on.

- John M. Guilfoil, Boston.com Correspondent

(Boston.com photo illustration)