Quote:
Originally Posted by ABMW
It's by far, the most accurate system, I've used. In fact, I don't know who makes the GPS receivers, but they're close to the level of the ones on my Meade 12" GPS - 200 Telescope (some will know how accurate those are).
I'm betting the GPS receivers are made by Sony or Philips, and are not made in Germany. I could be wrong, on who makes the receivers, but the point I'm trying to make is that the GPS, while it's not perfect, is satisfactory to say the least.
.
|
Just a comment about "GPS Accuracy"...
Your indicated position on the display is a synthesis of several bits of data- in particular the system "knows" you must be on a street, so it places the car cursor on the street- EVEN if the internally indicated positon (in terms of lat and long) might have your off the road. The GPS system is pretty accurate in absolute terms- in fact it is more accurate than most of the maps. (Maps say the road is one place, when it is actually off by 10, 20, 50 feet...) Maps are made using plats from the USGS, County and City maps, and satellite data. There are errors. The software corrects for this and keeps you nicely on the road. AThe software also uses accelerometer data when GPS drops out, and uses incremental data (ie there is 1500 feet between the first left and the next left, he went 1100 feet so far, so 400 to go.)
Use a GPS that is not a "car only" system, and you will see it is actually rare to be on the indicated road all the time.
A