Any one know if google earth is accurate?

#1
Hey I downloaded this program google earth because I got told you can measure distances on it. So I did that to plan out a run but the place I measured out seems allot smaller than I thought it was,so I was woundering if any of use could download it and measure your run places and see if its the same size as you thought it was.
 
#2
I have it on my PC and as far as i can tell it is accurate to 6 meters.
 
#3
scouser06 said:
Hey I downloaded this program google earth because I got told you can measure distances on it. So I did that to plan out a run but the place I measured out seems allot smaller than I thought it was,so I was woundering if any of use could download it and measure your run places and see if its the same size as you thought it was.
Hmm...I would say it is quite accurate. I measured a couple of 100m and 400m rifle range(s?) and it google earth came up with about 100m and 400m respectively. Not very helpful i know...
 
#4
Scouser,

How did you measure it in the first place?

msr
 
#5
Google Earth is accurate to around 7.5m - depending on the satellite source used. Certain of the imagery supplied for North America is accurate to 3m (mainly urban centres) - other parts of the globe have been defined as a lower resolution / accuracy on the basis that there ain't much there of interest.
 
#7
I think MSR means why did you think the run length was any different to the google answer? Had you previously paced it out or measured it on another map?

I just checked 2 runs I do and they pretty much match what I had measured them to be on a map.

If its any consolation I'm frequently disappointed to come home from a monster run which turns out to be not so monster.....

Tricam
 
#9
Bugger! Just measured my lunchtime run. Looks like it is 2.5 miles. :? Was it worth getting sweaty for?

Good job I am going to the gym tonight then. :(
 
#10
ABrighter2006 said:
Google Earth is accurate to around 7.5m - depending on the satellite source used. Certain of the imagery supplied for North America is accurate to 3m (mainly urban centres) - other parts of the globe have been defined as a lower resolution / accuracy on the basis that there ain't much there of interest.
Iraq is pretty accurate..., you get a great view of Shaibiza and Basra Palace.

Since you can overlay Lat and Long I'd say the only way you'll be more accurate is with a tape measure. Even the GPS running logs are subject to error. I'd say it's a lot mote accurate that a 1:50,000 or 1:25,000 map. You're going for a run, FFS not sending in a precision guided munition. How clucking accurate do you want it?
 
#11
I was mesureing a place which isnt far from mine and it just seems so much bigger than googel says.I thought the area of it where I was going to run was like 2 miles but it works out around 1.3.
 
#12
one on google earth while its a hot potato, why are some places in much less detail than others when magnification is high?
 
#17
flowers said:
Ok ok I've got it now!!!

Even I am allowed off-days Tri (*slap*)
Your right, however there is a general limit of quantity per month!!!
 
#18
Oneshot said:
flowers said:
Ok ok I've got it now!!!

Even I am allowed off-days Tri (*slap*)
Your right, however there is a general limit of quantity per month!!!
Oneshot goes to hide in a corner.....
 
#19
Is this measuring malarkey anything to do with the earth being round? google has mapped out the planet in 2 dimensions ie flat if you allow for the curvature will it not be longer? Or am i haveing a blonde moment?
 
#20
I believe, Google had mapped it out in 3d (if you zoom right out) also at the distances we are talking, the curvature is neglagble anyway!

Right idea though, it took me a while to work out why a plane flying to america, flies over canada rather than the straight line on the map!
 
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