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ffrr
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Joined: Oct 28, 2006
Posts: 44
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 Posted: Tue Jan 02, 2007 1:45 am Post subject: i3 not letting me set the exact address as destination |
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My i3 is on 3.2 and v7 of the Australian maps (new version mailed to me recently). The last 2 times I have tried to set a street address as a destination, it ends up offering nearby addresses, but not the exact address
For example, if I ask for something like 200 Example Rd, it offers 203, and 198. Of course this gets me close enough, but I am puzzled why it can't get it exactly. |
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PaulB2005
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Joined: Jan 04, 2006
Posts: 9323
Location: Durham, UK
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| Posted: Tue Jan 02, 2007 8:36 am Post subject: |
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The database is not 100% accurate and there are errors in it all over. One local postcode gives me the wrong road completely!
I use my i3 on a daily basis and find at least one example like your a week (i.e. looking for number 15 and it offers 14, 16, 18, 20 etc)
I have double checked the postcode with the Post Office http://www.royalmail.com/ but errors occur.... |
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ffrr
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Joined: Oct 28, 2006
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| Posted: Tue Jan 02, 2007 9:23 am Post subject: |
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| PaulB2005 wrote: | The database is not 100% accurate and there are errors in it all over. One local postcode gives me the wrong road completely!
I use my i3 on a daily basis and find at least one example like your a week (i.e. looking for number 15 and it offers 14, 16, 18, 20 etc)
I have double checked the postcode with the Post Office http://www.royalmail.com/ but errors occur.... |
I see. That's a bit disappointing. You'd think if it knew numbers in the same street, it could extrapolate the ones in between. Anyway, what were the people who made the maps thinking? Why would you store the coordinates of one house in a street, but not it's neighbour? |
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PaulB2005
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Joined: Jan 04, 2006
Posts: 9323
Location: Durham, UK
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| Posted: Tue Jan 02, 2007 9:53 am Post subject: |
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| Quote: | | You'd think if it knew numbers in the same street, it could extrapolate the ones in between. |
Sometimes odd numbered houses have different postcodes to the even numbers so it won't work like that.
| Quote: | | Anyway, what were the people who made the maps thinking? Why would you store the coordinates of one house in a street, but not it's neighbour? |
I'd think about the scale of the data they are handling. Errors will happen. |
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MaFt
Pocket GPS Staff
Joined: Aug 31, 2005
Posts: 15388
Location: Bradford, West Yorkshire
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| Posted: Tue Jan 02, 2007 10:07 am Post subject: |
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bear in mind, also, that no where in the advertisements / sales literature does it say that it will take you directly to the house that you want. they advertise as being able to locate a specific post code - a post code is typically an area as opposed to a certain house. the people that do the maps are the ones to blame really...!
still, it's not difficult once you get to a road to simply look for the number you require.
MaFt |
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Skippy
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Joined: 24/06/2003 00:22:12
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Location: Escaped to the Antipodies! 36.83°S 174.75°E
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| Posted: Tue Jan 02, 2007 10:17 am Post subject: |
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| ffrr wrote: | | You'd think if it knew numbers in the same street, it could extrapolate the ones in between. Anyway, what were the people who made the maps thinking? Why would you store the coordinates of one house in a street, but not it's neighbour? |
The Garmin knows about the house numbers at each intersection and it extrapolates that to guess where the house numbers inbetween might be.
House numbers are usually numbered evenly on one side of the road and odd on the other side. It is likely that from time to time the maps Garmin uses doesn't have house number information for the side of the road you want (say Even numbers) but it does for the other side of the road (odd numbers).
So as a compromise, it offers you a choice of the numbers it does know about (probably on the wrong side of the road) to hopefully get you close to your destination but without making a 100% commitment that it knows where the house number is.
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ffrr
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| Posted: Tue Jan 02, 2007 11:11 am Post subject: |
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| PaulB2005 wrote: | | Quote: | | You'd think if it knew numbers in the same street, it could extrapolate the ones in between. |
Sometimes odd numbered houses have different postcodes to the even numbers so it won't work like that.
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Interesting, because a post lower down says that IS how it works. I must admit, I did wonder whether they did every single house. |
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ffrr
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| Posted: Tue Jan 02, 2007 11:14 am Post subject: |
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| Skippy wrote: | | ffrr wrote: | | You'd think if it knew numbers in the same street, it could extrapolate the ones in between. Anyway, what were the people who made the maps thinking? Why would you store the coordinates of one house in a street, but not it's neighbour? |
The Garmin knows about the house numbers at each intersection and it extrapolates that to guess where the house numbers inbetween might be. |
So it does work like that. Thanks for the info.
| Quote: |
House numbers are usually numbered evenly on one side of the road and odd on the other side. It is likely that from time to time the maps Garmin uses doesn't have house number information for the side of the road you want (say Even numbers) but it does for the other side of the road (odd numbers).
So as a compromise, it offers you a choice of the numbers it does know about (probably on the wrong side of the road) to hopefully get you close to your destination but without making a 100% commitment that it knows where the house number is. |
Makes some sense. |
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ffrr
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| Posted: Tue Jan 02, 2007 11:20 am Post subject: |
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| MaFt wrote: | bear in mind, also, that no where in the advertisements / sales literature does it say that it will take you directly to the house that you want. they advertise as being able to locate a specific post code - a post code is typically an area as opposed to a certain house. the people that do the maps are the ones to blame really...!
still, it's not difficult once you get to a road to simply look for the number you require.
MaFt |
I agree that it gets you close enough. I don't remember seeing any info that says postcode only though. In fact, the manual instructs you to enter a full address, and to anyone reading it, this implies it will take you there. Frankly if it couldn't at least get me the right street, it would be unfit for purpose.
As for blaming the mapping people, well, Garmin sold me the maps! |
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ffrr
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| Posted: Tue Jan 02, 2007 11:23 am Post subject: |
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| ffrr wrote: | | MaFt wrote: | bear in mind, also, that no where in the advertisements / sales literature does it say that it will take you directly to the house that you want. they advertise as being able to locate a specific post code - a post code is typically an area as opposed to a certain house. the people that do the maps are the ones to blame really...!
still, it's not difficult once you get to a road to simply look for the number you require.
MaFt |
I agree that it gets you close enough. I don't remember seeing any info that says postcode only though. In fact, the manual instructs you to enter a full address, and to anyone reading it, this implies it will take you there. Frankly if it couldn't at least get me the right street, it would be unfit for purpose.
As for blaming the mapping people, well, Garmin sold me the maps! |
After posting, I wondered if you mean the same thing as I do when you use the term 'postcode'. In Australia, a postcode is an area as big as a whole suburb, and certainly, not close enough for a street directory type navigator. |
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PaulB2005
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Joined: Jan 04, 2006
Posts: 9323
Location: Durham, UK
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| Posted: Tue Jan 02, 2007 10:57 pm Post subject: |
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| Quote: | | Sometimes odd numbered houses have different postcodes to the even numbers so it won't work like that. |
Sorry what i think i meant was one end of the road can have a different postcode to another. Not opposite sides... |
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MaFt
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Joined: Aug 31, 2005
Posts: 15388
Location: Bradford, West Yorkshire
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| Posted: Wed Jan 03, 2007 11:16 am Post subject: |
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| ffrr wrote: | | After posting, I wondered if you mean the same thing as I do when you use the term 'postcode'. In Australia, a postcode is an area as big as a whole suburb, and certainly, not close enough for a street directory type navigator. |
ah, right! sorry, i'd assumed your postcodes were the same as ours! a uk postcode covers one side of a single street (except in really really remote areas where it may cover a whole village) - hence my comments!!
sorry ;)
MaFt |
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ffrr
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Joined: Oct 28, 2006
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| Posted: Wed Jan 03, 2007 11:20 am Post subject: |
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| MaFt wrote: | | ffrr wrote: | | After posting, I wondered if you mean the same thing as I do when you use the term 'postcode'. In Australia, a postcode is an area as big as a whole suburb, and certainly, not close enough for a street directory type navigator. |
ah, right! sorry, i'd assumed your postcodes were the same as ours! a uk postcode covers one side of a single street (except in really really remote areas where it may cover a whole village) - hence my comments!!
sorry ;)
MaFt |
No worries. We both learned something. I asked some people at work today who came from the UK and they told me the same as you just did. Sounds like a better postal system than ours. |
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PaulB2005
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Joined: Jan 04, 2006
Posts: 9323
Location: Durham, UK
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| Posted: Wed Jan 03, 2007 12:33 pm Post subject: |
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| Quote: | | a uk postcode covers one side of a single street |
So i was right then when i said ...
| Quote: | | Sometimes odd numbered houses have different postcodes to the even numbers so it won't work like that. |
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Wildie
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| Posted: Wed Jan 03, 2007 1:37 pm Post subject: |
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if we put in the full postcode and number for our home it puts our house on the wrong side of the street, the unit gets me with in the general area as some places we vist do not have a number.
best one todate was inputting postcode for border village england wales under england did not find it, used wales for country up it popped, pressed show on map says its in england.
we don`t expect 100% from a unit that sub 100 quid it gets us there.
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