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randypanda Occasional Visitor
Joined: Jul 13, 2006 Posts: 1
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Posted: Sat Aug 12, 2006 3:21 pm Post subject: how accurate |
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hi, being new to gps, could anyone tell me how accurate the mph is on tom tom, as it differs by about 5 to 6 mph to the speedo on my car. thanks. |
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elyl Occasional Visitor
Joined: Sep 21, 2005 Posts: 38 Location: UK
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Posted: Sat Aug 12, 2006 4:01 pm Post subject: |
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Generally more accurate than your speedo. Your speedo will likely tell you you are travelling faster than you actually are. This is by design, as it's better to have the error show you're going faster rather than slower than you really are. If you're travelling on pretty straight/level road, then your GPS is very accurate. |
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Oldboy Pocket GPS Moderator
Joined: Dec 08, 2004 Posts: 10643 Location: Suffolk, UK
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Posted: Sat Aug 12, 2006 5:46 pm Post subject: Re: how accurate |
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randypanda wrote: | could anyone tell me how accurate the mph is on tom tom, | I believe a figure of 0.1% has been quoted.
But only if your travelling on a straight road, and not going up, or down, hill. _________________ Richard
TT 910 V7.903: Europe Map v1045
TT Via 135 App 12.075: Europe Map v1135 |
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deep_south Occasional Visitor
Joined: May 26, 2004 Posts: 22
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Posted: Wed Aug 16, 2006 11:08 pm Post subject: |
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Note that the GPS speed seems to be averaged over the previous 10 seconds - you can see this as you come to a stop.
If you are on a level road, then the GPS speed is extremely accurate. Most UK car speedo's over read by between 0% and 10%, but some are also accurate! |
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