[gps-talkusers] Re: my first trip with 4.0--not good

Sorry about the duplicate messages everyone,
For some reason Eudora is being funny and putting into the To field two copies of gps-talkusers@xxxxxxxxxxxx when I sometimes reply to messages. Its driving me nuts. Has anyone else have this happen? 
I think my machine is possessed!

Charles.

At 08:12 PM 7/29/2007, you wrote:

Hi Alex, let me try to explain some issues you are encountering.
See below.

At 06:27 PM 7/29/2007, Alex Parks wrote:

Hi all,
I just tried to walk a simple, half-mile route then come back. Because of the Blue Logger I had to create the route partway through, but as soon as I did I had "skipped 2 points along route". How could I since I had created the route not five seconds previous to that message? 

A possible reason why this may occur.
GPS does jump around and before you created the route your GPS position could have been quite far from where you are, and therefor the starting point you already passed and then the nearest point may be a non-turning waypoint and therefore the next waypoint you are trying to get to is the next turn at Waypoint #3.
Waypoint 1 is the GPS location when you pressed create route, Waypoint #2 is either going to be the next intersection ahead (if your GPS location is less than 50 feet from the nearest street), or Waypoint #2 is going to be the perpendicular bisection from the GPS location to a point on the street which forms a 90 degree angle) (i.e. a straight line from your GPS to the street) which will be a turning point on the street and then Waypoint #3 will be the next intersection.
So after the route is created then the system looks to see where your new "current" location is along the route and will take distance readings between yourself and WP1, WP2, WP3 etc. and if you are closer to WP3 then it will say skipped x number of waypoints.
Sorry if that is confusing, but behind the scene that is what is going on, the system is constantly looking to see if you are on route, which waypoints you are closer to and if you never reach a specific one and you are all of a sudden closer to a waypoint further down your route that is when you will get the skipped x # of waypoints along your route. Unless you turn on "Force sequential route following" Then it won't skip waypoints.
Anyway, all turns were announced very early and I kept getting sequences of messages like "Approaching xxx street in 250 ft." "Turn right on xxx street". "xxx street, 100 ft ahead". Why would it say I was approaching, tell me to turn, then tell me I had not even reached the street onto which it just told me to turn??? BTW, my accuracy through this little treck was between 25 and 54 ft (4-7 satellites).
Ok first it sounds like you also have Lookaround mode "Intersections" turned on, this could be causing the duplicate messages about upcoming intersections as well as the route announcements.
The system will give you 2 messages, one announcing the "Approaching" turn, and then when you get closer to the turn a "Turn Now" message. These messages are should be announced ahead of time, to give you enough time to prepare yourself for the upcoming turn. With GPS error and map error the last thing we want to do is for you to actually hit the street, cross the street and then the system tells you "oh by the way that was the street you were soposto turn on".
The BlueLogger by the way isn't as accurate as the newer Holux Slim 237 (Sirf III) GPS receiver which is smaller, alot more accurate, and has a very fast time to first fix (I usually get a GPS fix within about 15-20 seconds).
I love the new interface and bluetooth receiver handling. I love the new POI database and other updates to the maps. The routes and accuracy are quite bad, though. I will say they are not as bad as they were in 3.5, but it is like routes are planned from either your starting or ending point in a previous route or something and not from where you are at the time at which you create the route. I must just be lucky--I seem to always be the one with the bad experiences with these updates. <smile
Alex this doesn't sound right, the system does pick your current GPS location as the starting point (as long as you are in GPS mode. If you are in Virtual mode it will pick your Virtual location as the starting point.
Please send me a route in your opinion is "bad" and I will look to see what the system did. Also tell me what the route should have done instead. Also it may help to send me a "Replay" of your GPS when you create the route so I can see what is going on. 

Thanks.
Charles.



Have a great day,
Alex


Charles M. La Pierre CTO
Sendero Group, LLC

Lat. 37 15' 25" N  Lon: 121 53' 04" W



Charles M. La Pierre CTO
Sendero Group, LLC

Lat. 37 15' 25" N  Lon: 121 53' 04" W

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