Rob E
Pierrot
Reged: 05/20/09
Posts: 1132
Loc: Eastern Virginia
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LP KMZ File Enjoy..
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Rob E.
Some of us are actually paid to be funny.
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Zhumell 16"
Orion 120ST
Orion Starmax 127
Baader Planetarium Hyperions
Zhumell SWA EP's
There's two ways to do anything...right and twice
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senske
sage
Reged: 01/10/09
Posts: 360
Loc: Spokane, WA
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An excellent overlay, indeed!
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Andrew
Orion SkyQuest XT10 Intelliscope with Orion 9x50 and Telrad Finders
Orion WorldView 10x50 Binoculars
Celestron NexStar 8 SE with GSO 8x50 and Red Dot Finders
Galileoscope
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Matthew Ota
Pooh-Bah
Reged: 04/30/05
Posts: 1096
Loc: New England
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The overlay works great. I used it to find an excellent observing site in a blue zone only 17 miles from where I live. It is in a meadow near a pond.
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Matthew Ota
Meade LX250GPS 10 inch SCT (Frankenscope)
Orion ED 80
ETX-90 OTA
Coronado Helios 1 H-alpha
TheSky 6 Pro
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Rob E
Pierrot
Reged: 05/20/09
Posts: 1132
Loc: Eastern Virginia
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No telling how long since it's been updated so please don't take it as absolute.
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Rob E.
Some of us are actually paid to be funny.
------
Zhumell 16"
Orion 120ST
Orion Starmax 127
Baader Planetarium Hyperions
Zhumell SWA EP's
There's two ways to do anything...right and twice
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Darenwh
Pooh-Bah
Reged: 05/11/06
Posts: 1224
Loc: Covington, GA
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Remember also that just as important, if not more important, than the color zone you are in is that there are little or no lighting in the area to inhibit your eye's dark addaption.
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Daren
Covington, GA
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Rob E
Pierrot
Reged: 05/20/09
Posts: 1132
Loc: Eastern Virginia
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Agreed, you can be in the blackest black or bluest blue and that stupid streetlight will tip the scales against you every time.
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Rob E.
Some of us are actually paid to be funny.
------
Zhumell 16"
Orion 120ST
Orion Starmax 127
Baader Planetarium Hyperions
Zhumell SWA EP's
There's two ways to do anything...right and twice
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Dave G
member
Reged: 09/02/09
Posts: 12
Loc: Lynnwood, Washington
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Nice overlay! Much faster response over using web based overlays. But can anyone tell me why large rivers and coastlines are considered white zones? It makes no sense that some of these white areas merge right into yellow or even green zones with no red or orange layers separating them. See attached image of Puget Sound in Washington state as a exmaple.
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Hrundi
Pooh-Bah
Reged: 02/06/08
Posts: 1246
Loc: Estonia
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There is also an overlay for europe. I don't have the link for that though.
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Tony Flanders
Post Laureate
Reged: 05/18/06
Posts: 3469
Loc: Cambridge, MA, USA
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Quote:
Can anyone tell me why large rivers and coastlines are considered white zones?
Rivers are not; coastlines are.
The underlying data all comes from the World Light Pollution Atlas. The charts there were created long before map overlays existed. Coastlines and international boundaries are drawn in white; otherwise the maps would be virtually indecipherable.
It's unfortunate that Pierantonio Cinzano does not distribute the maps without the white lines, which would be far more useful for many applications. But that's the way it is.
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Tony Flanders
First and foremost observing love: naked eye.
Second, binoculars.
Last but not least, telescopes.
And I sometimes dabble with cameras.
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