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| How old is your area''s imagery |
| Less than two years |
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25% |
[ 1 ] |
| between 2-3 years |
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0% |
[ 0 ] |
| More than three years |
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75% |
[ 3 ] |
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| Total Votes : 4 |
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| Author |
Message |
tbernstein
Joined: May 16, 2003
Posts: 1576
Location: London
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 Posted: Tue Sep 01, 2009 4:24 pm Post subject: Google Earth |
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| I'm just curious.
Since the imagery for London, one of the world's major capital cities, is now over 3 years old, and Google say that imagery ought to be 2-3 years old, is there any place that is updated more often than three years or indeed how many places take much longer to update than google say.
There's one of the little polls to put your response into.
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drwho07
Joined: Nov 29, 2007
Posts: 1546
Location: Central FL, USA
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| Posted: Sat Sep 05, 2009 10:32 am Post subject: |
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Ha! Ha!
At our local tax collector's office is a large map of the county.
That map has to be at least 20 years old.
It shows huge blank areas where complete sub-divisions have been built.
There is one internet service that shows aerial photos of my property.
It's still showing trees that I cut down several years ago.
I guess it costs a lot of money to update all those old aerial maps, so it doesn't get done very often. Too bad!
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tbernstein
Joined: May 16, 2003
Posts: 1576
Location: London
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| Posted: Mon Sep 21, 2009 5:11 pm Post subject: |
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Oh well.
just to tie this up. As a matter of interest I looked at some other major cities.
Most were around two years old
New York's was as old as London's! |
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drwho07
Joined: Nov 29, 2007
Posts: 1546
Location: Central FL, USA
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| Posted: Tue Sep 22, 2009 9:07 am Post subject: |
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The phone company prints a new phone book every year and their data base is updated daily.
So you'd think the folks that make maps, could update them at least annually.
Around here, they are laying down new roads so fast that a map that's a month old wouldn't even be accurate. It's Crazy !!! 
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tbernstein
Joined: May 16, 2003
Posts: 1576
Location: London
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| Posted: Fri Sep 25, 2009 6:15 pm Post subject: |
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Well, this is sort of the reason I posted this.
Google say they update at around the 2-3 year mark.
Clearly, often they don't. Even for major population centres.
Yet for a major world City even that would be a stretch. For London and New York to be over three years old just isn't acceptable. |
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bern
Joined: Mar 12, 2007
Posts: 1432
Location: ann arbor
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| Posted: Fri Oct 30, 2009 10:00 am Post subject: Re: Google Earth [Login to view extended thread Info.] |
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| tbernstein wrote: |
I'm just curious.
Since the imagery for London, one of the world's major capital cities, is now over 3 years old, and Google say that imagery ought to be 2-3 years old, is there any place that is updated more often than three years or indeed how many places take much longer to update than google say.
There's one of the little polls to put your response into. |
What is the definitive way to know what the date of the imagery is? The only way I can see is to look for changes in the landscape and see if the imagery has changed to match. |
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tbernstein
Joined: May 16, 2003
Posts: 1576
Location: London
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| Posted: Fri Oct 30, 2009 4:31 pm Post subject: [Login to view extended thread Info.] |
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Bottom left....
Though that's recent.
When I posted this at first, it was by the image details. |
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bern
Joined: Mar 12, 2007
Posts: 1432
Location: ann arbor
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| Posted: Fri Oct 30, 2009 9:37 pm Post subject: [Login to view extended thread Info.] |
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| tbernstein wrote: |
Bottom left....
Though that's recent.
When I posted this at first, it was by the image details. |
OK, I found it. I didn't have the "status bar" turned on. |
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