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Title: Astoundingly Inaccurate in places
Review: I wanted something other than the base map that is built into my GPSMap 76CSx. I admit that I have not spent much time with this so far, but my initial impression is pretty bad. Until I ordered this product, I had been driving around San Diego, recording my tracks. When I loaded this product, I was startled to see how far off my tracks are in some places from the roads indicated on the map. For example, the east end of Sorrento Valley Blvd is pretty good. The west end of this road appears in this map a full 1000 feet (Yes. One thousand!) to the south of the actual road! It's not like there is an overall shift of coordinates or anything like that. The roads are right in some places, and then just wander off.
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