What are all the blobs in the North Sea? Oil rigs?
Light Pollution Map
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Re: Light Pollution Map
#12Does this tool take into account elevation? The Mt. Wilson observatory, for instance, being on the outskirts of LA, is in a red zone on that map, yet is still a great place to stargaze.
Not that this map isn't useful and insightful, but perhaps it can make things seem worse than they really are? As long as you have mountains around you, it's not like you can't go there to see the stars with the naked eye. Last year, that comet was pretty easy to see from up there.
Re: Light Pollution Map
#13The site appears to be using OpenStreetMaps based on the font. But I don't see any attribution to OSM anywhere on the site? It's a part of the agreement to use OSM... *I was wrong
It uses Bing Maps and has this: © 2021 Microsoft CorporationEarthstar Geographics SIO© 2021 TomTomTerms of Use Jurij Stare, www.lightpollutionmap.info (v2.7.7) VIIRS Earth Observation Group, NOAA National Geophysical Data Center
Are you using a framework for your map or did you come up with those tooltip dissolving into tic-tac-toe animations yourself?
Re: Light Pollution Map
#14Does this tool take into account elevation? The Mt. Wilson observatory, for instance, being on the outskirts of LA, is in a red zone on that map, yet is still a great place to stargaze. Not that this map isn't useful and insightful, but perhaps it can make things seem worse than they really are? As long as you have mountains around you, it's not like you can't go there to see the stars with the naked eye. Last year,…
I've camped around the Los Angles area and it is visibly bright in the mountains up to 50 miles away to the point that it feels like twilight on the horizon all night long.
Re: Light Pollution Map
#15Is amazing the amount of light pollution in Siberia around the oil/gas extraction areas.
Re: Light Pollution Map
#16I checked the area I live in, it's pretty rural and has no red, except for one blob that seems to be in the middle of nowhere. So I looked it up on a satellite photo and sure enough, there's a large greenhouse operation there.
Seems odd that they'd be running their lights at night, though.
Re: Light Pollution Map
#17Isn't Light Pollution directly proportional to population density?
Re: Light Pollution Map
#18Nice project! A few questions:
How is this data collected? (I'm guessing a satellite image of city lights across the world)
I'm trying to understand the scale. Zenith means overhead, so overhead sky brightness. The magnitude scale stops at 17 but I thought magnitudes above 7 is no longer visible to the human eye [1]
Re: Light Pollution Map
#19I checked the area I live in, it's pretty rural and has no red, except for one blob that seems to be in the middle of nowhere. So I looked it up on a satellite photo and sure enough, there's a large greenhouse operation there. Seems odd that they'd be running their lights at night, though.
Depends on what they are growing, cacti and orchids for example LOVE 24/7 light and grow way faster then the typical 16/8 light schedule.
But most are probably some form of veggie or flower so they need 16/8 light schedule.
Re: Light Pollution Map
#20Isn't Light Pollution directly proportional to population density?
In general yes, though just looking quickly, it seems like Belgium for example was a lot brighter than surrounding countries, and I don't think they have that high of a density?
I would liked to see a map like this normalized for population density, though not sure how granular that data is.