After 2 weeks of daily research, I've come to the conclusion (almost a info concussion) that most if not all GPS are not worth the $ paid for them. Every time I read a review of a new, somewhat new or old unit, the 3 star reviews scare me. Mostly tha...
The State of Cal (DOT) publishes what are called shapefile gps maps. http://www.dot.ca.gov/hq/tsip/gis/datalibrary/index.php - If I had the knowhow, I would add them to the gps mapping. It's an overlay. What is really needed is for the gps makers to ...
