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General Astronomy >> Light Pollution
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krp
super member


Reged: 11/10/10

Loc: Central Illinois
Light Pollution Plugin for Google Earth new
      #5697477 - 02/23/13 10:25 PM
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Awhile ago I downloaded a plugin for Google Earth that shows the light pollution for North America. But it uses the old light pollution data (from 1997). Does anyone know where I can find the newer (2001) light pollution plugin for Google Earth? I know I can download PNG's here: Light Pollution Maps but I can't use them in Google Earth unless I have the exact coordinates to match the edges. There is a big difference between the two maps especially in the midwest.
Kevin

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Dark Sky Scott
super member


Reged: 01/06/12

Loc: Tucson, Arizona
Re: Light Pollution Plugin for Google Earth new [Re: krp]
      #5700329 - 02/25/13 06:02 PM
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krp, I haven't found one for sky glow, but here's one for city lights imaged from space with data from last year:

http://earthobservatory.nasa.gov/IOTD/view.php?id=79803

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Rich V.
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Reged: 01/02/05

Loc: Lake Tahoe area, Nevada, USA
Re: Light Pollution Plugin for Google Earth [Re: Dark Sky Scott]
      #5700334 - 02/25/13 06:08 PM
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This appears to be the newer data:

https://productforums.google.com/forum/?fromgroups=#!topic/gec-google-earth-o...

Rich

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audioaficionado
sage


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Light Pollution Plugin for Google Earth new [Re: Rich V.]
      #5774638 - 04/03/13 02:33 AM
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Quote:

This appears to be the newer data:

https://productforums.google.com/forum/?fromgroups=#!topic/gec-google-earth-o...

Rich

Awesome! This is much more useful than just the .jpg or having to go to the published Google map site.

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REC
Carpal Tunnel
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Reged: 10/20/10

Loc: NC
Re: Light Pollution Plugin for Google Earth new [Re: Rich V.]
      #5775213 - 04/03/13 10:45 AM
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Interesting, I'm living right on the edge of a red zone facing orange! Have to take a ride west to a nearby green zone one night.

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vsteblina
sage


Reged: 11/05/07

Loc: Wenatchee, Washington
Re: Light Pollution Plugin for Google Earth new [Re: REC]
      #5775421 - 04/03/13 12:08 PM
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Interesting....it appears that the date of the imagery was winter. The ski areas on the Cascade crest show up.

Wow, I remember a wildlife biologist complaining about the light pollution and impact on wildlife when I was working.

It does look that bad on the ground!!!

Otherwise, some areas that I am familar with appear to UNDERESTIMATE the extent of light pollution.

Thanks for the posting.

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krp
super member


Reged: 11/10/10

Loc: Central Illinois
Re: Light Pollution Plugin for Google Earth new [Re: vsteblina]
      #5780551 - 04/05/13 09:10 PM
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Are there any plans to create an even more updated light pollution map? 2001 was a long time ago. I know some areas, such as North Dakota have changed a lot.

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Phillip Creed
Idiot Seeking Village
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Reged: 07/25/06

Loc: Canton, OH
Re: Light Pollution Plugin for Google Earth new [Re: krp]
      #5818864 - 04/23/13 11:03 PM
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For the new light pollution maps w/2001 data, I've taken a bit more interest in the expanded color map, which breaks each of the color zones in half:

https://sites.google.com/site/3davel/home/light-pollution/more/images-1

Since each zone is a factor of 3 in sky brightness, breaking each zone in half amounts to ~1.7x factor in sky brightness. This is a *great* tool for site scouting when you're looking to squeeze out every last bit of darkness for your 1/2-hr / 1-hr / 2-hr drive to an observing site.

This map has been around for a few years, but the one thing I can't find is a Google Maps overlay of the expanded color scheme. Anyone know of such a beast?

Clear Skies,
Phil

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