Here it is folks. The extent of light pollution in North America. Shameful...

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Shameful...

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...great overlay anyway!
thx
g

Hi syzygy426

markdj also posted the European Light Pollution and danescombe, the South West England Light Pollution. You could see both posts in the Ecology Collection

Regards

Wow, very interesting overlay!

Can anyone confirm the date of these maps? I've seen light pollution maps from another source and they were date July 2002. These appear to be identical.

This is unfortunate. Sad to see it isn't just on a national level.

there is no such thing as light pollution...........lights do not harm anything.......i think its cool to see all the lights that cities make...........i think people that complain about lights are depressed because it means they want to live in the dark......think about that.........without lights we would be running into stuff so just be thankful we have electricity....without it....you would be miserable.....

The night sky as seen from one location 50 years ago and tonight. See this site for more about light pollution and its effects.

Obviousy if you like bright lights and want to be able to see nearby things well day and night, you won't care about dark night skies.

But if you have ever been under a really dark night sky and been absolutely in awe of the thousands of visible stars and the beauty of the night sky, you will change your opinion. And of course for astornomers, the darker the night sky, the further you can see and the dimmer the objects you can see.

If you haven't done it yet, click on the little picture of Saturn in your viewer's toolbar. Unclick all layers and pan around and zoom in. After exploring on your own, turn one one or two layers at a time and explore the placemarks. I think you may have a hard time leaving quickly once you begin to explore.