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Old 05-01-2009, 07:16 AM   #11
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My TomTom allows me to add map corrections and share them with others. Yesterday I changed a curve that had one end blocked off. Odd, since the same basic change done elsewhere in the same town around the same time was in the maps.

It definitely has some weird stuff, design wise. I can't set it to not quiz me every time as to whether or not to avoid unpaved roads. I live off of one, so every single time it pesters me. I also can't make it lock the owner's information. It can take a password, but then I have to enter it each and every time it starts up. I just want to require a code to change the info!
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co de pen den cy
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: a psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (as an addiction to alcohol or heroin) ; broadly : dependence on the needs of or control by another
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Old 05-01-2009, 07:17 AM   #12
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Sounds like MapShare which comes at an addition cost as I recall.
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Old 05-01-2009, 07:23 AM   #13
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Yes, MapShare. Good news is it's free. I assumed it wasn't too but I checked into it.
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Main Entry: co de pen dence - see codependency
co de pen den cy
Pronunciation: \kō-di-ˈpen-dən(t)-sē\
Function: noun
Date: 1979

: a psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (as an addiction to alcohol or heroin) ; broadly : dependence on the needs of or control by another
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Old 05-01-2009, 07:27 AM   #14
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+1 on the GPS being the best clock.

Here's how GPS technology works (very simplified): The satellites all broadcast the time with very fine resolution, and very accurately. Because that broadcast moves only as fast as light, there is a very tiny difference between each satellite's broadcast in how long it takes to reach you. Your GPS compares that and calculates how long it took to arrive from each of 4 or more satellites, and therefore its distance from each of those satellites. It figures its position based on that.

Therefore, the time has to be perfectly synchronized and measured in each satellite and in the GPS receiver, which assures you that it's got the best time.

That also means that if your GPS is having trouble acquiring its position, you should make sure it's got the time set correctly (or nearly so); that helps it make sense of the satellite signals more quickly.
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Old 05-01-2009, 07:30 AM   #15
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Quote:
Originally Posted by bobc455 View Post
I will also occasionally use it to double-check the routes that I take every day. For example it did give me an alternative route from the gym to work that I'd never have considered, which is actually shorter & quicker than my old route (hence saving me some gas).
I've found that Google Maps (not Google Earth) by far the best for this purpose. I used to like Microsoft Streets & Trips best, but now with Google Maps you can drag your route to your preferred roads. Especially combined with satellite imagery, this makes it the perfect tool for detailed fine-tuning of a daily route.
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Old 05-01-2009, 07:31 AM   #16
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Any way to set max speed in Google Maps? If there is I've been missing it.
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Main Entry: co de pen dence - see codependency
co de pen den cy
Pronunciation: \kō-di-ˈpen-dən(t)-sē\
Function: noun
Date: 1979

: a psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (as an addiction to alcohol or heroin) ; broadly : dependence on the needs of or control by another
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Old 05-01-2009, 07:34 AM   #17
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No, setting different speeds for different types of roads was one of the things I liked about Streets & Trips, but with Google Maps ability to graphically manipulate routes there's no need for it.
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Old 05-01-2009, 07:34 AM   #18
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+1 on the GPS being the best clock.
I always assumed GPS units were just digital clocks updated from an atomic clock every so often. Is that true? The satellites have atomic clocks I know, but clearly the unit doesn't!
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Main Entry: co de pen dence - see codependency
co de pen den cy
Pronunciation: \kō-di-ˈpen-dən(t)-sē\
Function: noun
Date: 1979

: a psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (as an addiction to alcohol or heroin) ; broadly : dependence on the needs of or control by another
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Old 05-01-2009, 08:31 AM   #19
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The GPS time is updated from the satellites every second. That's how it knows where you are.
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Old 05-01-2009, 08:34 AM   #20
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Now that's interesting. Since there are delays in the communication from the satellites, and it also relies on those delays to compute the position, I wonder how they accurately figure out exactly what to set the time to? Pretty easy if you know already almost exactly your location or the time I guess.
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Main Entry: co de pen dence - see codependency
co de pen den cy
Pronunciation: \kō-di-ˈpen-dən(t)-sē\
Function: noun
Date: 1979

: a psychological condition or a relationship in which a person is controlled or manipulated by another who is affected with a pathological condition (as an addiction to alcohol or heroin) ; broadly : dependence on the needs of or control by another
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