wardialer
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Google Earth Question

Sun Jun 24, 2012 10:59 am

Hi,

How can I enable Google Earth to display cities when zooming out like here below in this picture (which is not Google Earth)?

http://upload.wikimedia.org/wikipedi...ommons/8/85/Great-circle_route.jpg

Thanks
 
aloges
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RE: Google Earth Question

Sun Jun 24, 2012 11:56 am

Open the sidebar, go to "layers" and activate "places" - I've had to translate all the terms from German, so perhaps it's e.g. "towns" instead of "places".
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wardialer
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RE: Google Earth Question

Sun Jun 24, 2012 12:57 pm

I know. But it only displays these when zooming in. But when I zoom out the cities dissappear.
 
Ideekay
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RE: Google Earth Question

Sun Jun 24, 2012 5:35 pm

For what do you need it?

When you need it for a Trip Report than u may use: http://www.gcmap.com/
 
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HAWK21M
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RE: Google Earth Question

Mon Jun 25, 2012 10:26 am

A related question....how frequent is Google Earth updated & is there a possibility of a live feed on Google earth at a cost....
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zkojq
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RE: Google Earth Question

Mon Jun 25, 2012 11:25 am

Quoting HAWK21M (Reply 4):
is there a possibility of a live feed on Google earth at a cost....

Not possible, because:
1) Google doesn't own any satellites (to my knowledge at least).

2) Most urban areas in google earth/maps are actually done by aerial photography, not satellite imagery.

3) If google did offer such a service it would be immensely popular (for both civil and military applications) and there wouldn't be enough satellites.

4) The weather (more specifically clouds).

5) Imagine all the legal/privacy concerns it would cause.  Wow!
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Rara
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RE: Google Earth Question

Mon Jun 25, 2012 10:24 pm

In fact there are quite some misconceptions about how satellite imagery works, mainly due to spy movies and suchlike.

In order for a satellite to photograph something even remotely to Google Earth quality standards, it needs to be in low earth orbit. Low earth orbit means that the satellite moves tenths of kilometers every *second*, so you'll only get a still photo of what you're interested in, it'll be low quality, and even if you're military you can only get the next update 15 minutes or so later. Live pictures of moving vehicles, like you'd see in a movie, are impossible. Any photograph you get is a lucky shot.

Of course satellites can be in geostationary orbit, but that has to be a lot further out (as in like a 100 times further out) from which they could theoretically keep observing the same spot, but from that distance you can't get any meaningful pictures (except of a huge area, of a whole weather system maybe).

In other words, Live Google Earth is impossible.

Quoting zkojq (Reply 5):
2) Most urban areas in google earth/maps are actually done by aerial photography, not satellite imagery.

Correct - aerial photography is much better for their purpose..
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prebennorholm
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RE: Google Earth Question

Tue Jun 26, 2012 2:46 am

Quoting Rara (Reply 6):
Low earth orbit means that the satellite moves tenths of kilometers every *second*...

Low earth orbit satellites move at 8 km/s.

Another speed requires a planet with a different gravity or diameter.
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HAWK21M
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RE: Google Earth Question

Tue Jun 26, 2012 9:11 am

Quoting zkojq (Reply 5):
t would be immensely popular

undoubtly....wont be surprised one day it will happen.
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ouboy79
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RE: Google Earth Question

Tue Jun 26, 2012 3:48 pm

Quoting wardialer (Thread starter):
How can I enable Google Earth to display cities when zooming out like here below in this picture (which is not Google Earth)?

Since your question hasn't been answered. You can't. You would have to create a new layer and code in the settings to display at certain "heights". It is something that has frustrated me as well.
 
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AirPacific747
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RE: Google Earth Question

Tue Jun 26, 2012 4:37 pm

Quoting zkojq (Reply 5):
and there wouldn't be enough satellites.

Not really a problem.. One satellite could just stream the images to a server that could stream it onwards to several other servers I would guess.
 
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Francoflier
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RE: Google Earth Question

Tue Jun 26, 2012 10:42 pm

Quoting HAWK21M (Reply 4):
how frequent is Google Earth updated

I would say it depends on the areas. Popular areas would be updated more frequently. The more interesting and frequented areas on Google Earth are low altitude images, so I would guess the satellite pictures used for higher levels aren't updated that frequently as things don't change that much at that resolution anyway.
Lower altitude images would be updated more frequently, but aerial surveys are expensive so, again, it would depend on the viewing traffic in a particular area.

Many areas (desertic, remote, rural) are still only satellite.
I wonder if they manage to get different resolutions depending on the satellite image providers, and if lower resolution = cheaper images?
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zkojq
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RE: Google Earth Question

Wed Jun 27, 2012 3:06 am

Quoting AirPacific747 (Reply 10):
Not really a problem.. One satellite could just stream the images to a server that could stream it onwards to several other servers I would guess.

True, but I'm assuming that each user wants to look at a different bit of the earth.
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mandala499
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RE: Google Earth Question

Wed Jun 27, 2012 7:18 am

Quoting francoflier (Reply 11):
I wonder if they manage to get different resolutions depending on the satellite image providers, and if lower resolution = cheaper images?

Yes... general rule of thumb... the higher the complexity, the more expensive it is. Complexity can come in terms of spectral complexity, or resolution. Highly complex spectral imagery at high resolution = very expensive... the image resolution gets translated into the available mapscales.

For live satellite imagery, well, they're very expensive... and these satellites move as they're in low earth orbit (high detailed ones, and cross out geostationary satellite imagery out of our fantasy list at the moment).. so any spot you want to monitor, the satellite needs to position itself onto an ideal orbit which gives it maximum exposure time to view the spot with its camera... ain't cheap... those spy satellites are not called "orbital gas tanks" for no reasons.

Some make these services available to "qualified customers"... but, can't divulge much...

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