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Google and Live Local AP's - how old are the images?
#1
Can anyone tell me how often the AP's that you get with e.g. Google Earth are updated?

I ask because I am trying to correlate some Landranger maps with areas that have been forested. Of course, FC land is subject to being felled eventually - I would just like to know if the image I get on a Google AP would be an accurate representation of how the ground looks like now or whether it could be a year or two out of date. The images carry a copyright mark and the date 2010 but I am unsure if the date refers to the age of the image or just that fact that it is copyrighted for the year 2010.

Cheers,

Bier
Belhaven is your friend
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#2
Bier - as you guessed the copyright date in Google Earth is not the date that the image was taken. The good news is that if you're using version 4.3 or later of Google Earth (the application - not the web only Google Maps) the date of the image capture is given on the grey bar at the bottom of the main view window (next to the lat/long/elev information). As far as I can tell from checking the date against known developments in my area this date is accurate. The date will therefore change as you move around the map. Also if you click the time-slider icon in the toolbar (looks like an analogue clock-face) you can view other available images of different dates - the number will vary as to area. I'm not sure of there being a 'standard' length of time for Google Earth image refreshes. They seem to be every 2-3 years, but i guess it depends on the quality/cost of imagery available for any particular area.
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#3
Cool, thanks for that tmsarch, cleared that up nicely for me.

Cheers,

Bier
Belhaven is your friend
Reply
#4
Varies wildly around here as to how many lots of photos of different dates there are on Google, usually between one and four, one job I did recently there were even some 1940s ones on (?German ones? - definitely not normal 1946-8 RAF ones), which was a pleasing development (although the resolution was pretty poor). Been using some last week that were dated 1.6.09 at the top that must have been taken pretty close to that date, hadn't spotted that bit at the bottom so cheers for the tip TM :face-approve:
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#5
The Google Earth map for central Norway shows my mates car in his driveway. He got rid of that car about 4 years ago....
With peace and consolation hath dismist, And calm of mind all passion spent...
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#6
Must admi to now using Bing Maps as the resolution in my area is much better. Am now mapping Rig and Furrow and Sheep enclosures (I know... I know... I can sure have a goood time!) Use of the images is dependant on use... I recently had to deal with this, as the copyright is complicated. mainly... you can use it... but don't publish it!
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#7
I too have looked at BING, but certainly for rural Norway (and maybe things are different in Fifeshire) they use the same aerial maps as used on on Google Earth. How do I know this? Cloud formations in the photos are identical....One set of photos (GE) claims to be sourced through TetraMetrics and the other (BING) through Harris Corp Earthstar Geographics, but as the photos are identical I guess they actually share a common uncredited source....NASA, CIA, KGB, Ordnance Survey, God....?
With peace and consolation hath dismist, And calm of mind all passion spent...
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