All text and pictures are copyrighted © AVEX 2010
Here are the map of light pollution of a part of the United Kingdom.
Some thoughts …
I focused the job on the main island. Ireland is, for the time being, not yet rendered. England, Scotland and Wales are covered by the map of light pollution.
I rendered maps in different folowing ways
A-« Color scale » map
Visual observation light pollution map + topography + relief
Light pollution map + without typo
Map for astrophoto & CCD
B- PDF « Sodium »
Light pollution map + topography + relief (for public demo)
- C- Google Earth files
Following recent advances in data management, maps in Google Earth have significantly improved their positioning precision.
Anytime, urbanization datas I have are relatively incomplete, missing some small villages that have _after checking_ urban lighting! So, in rural areas, some sources of light pollution are not on maps. I’m sorry but
right now I have no way to do otherwise.
These maps are absolutely free, however this takes time and required hardware to build them. Any donation will be greatly appreciated (€ , £ or $)
White : 0-15 visible stars (without planets) according to the conditions. Very high level of light pollution and all around. Typical of big urban centre and big regional and national cities.
Magenta: 25-80 visible stars. Principles constellations began to be recognizable.
Red: 80-150 stars : constellations and others stars appears. In a telescope, Some Messier object began to be observable.
Orange: 150-250 stars in good conditions. The light pollution is present all around but some darks areas appears. Typicaly the middle suburbs.
Yellow: 250-500 stars. Strong light pollution but the Milky Way can appear in good conditions. Some Messiers among the most bright can be visible with the necked eye.
Green: 500-1000 stars : far peacefull suburbs, Milky Way many times visible but very sensitive to the atmospheric conditions. Typicaly, the glare of light pollution take a large place in the sky and reach at 40-50° of elevation.
Cyan: 1000-1500 stars. The Milky Way is visible most of the time in fonction of climatic conditions but without contrast.
Blue: 1500-2000 stars. Good sky. The Milky Way is easily visible, we began to have the sensation of a good sky, but, some source of light pollution damage the sky and in a second time the sky by reflexion at the vertical of the observer.
Night blue : 2000-3000 stars. Very good sky. The Milky Way is present and powerfull. The light glares are far away and scaterred, they don’t affect the sky quality.
Black : (green by texture transparency) : more than 3000 stars. No light pollution problems revealable on the sky quality
1 These maps are the exclusive property of Frederic Tapissier / AVEX or its beneficiary.
2 The author gives the authorization to diffuse THESE maps in a private context only.
3 The rights cannot be transferred by the user to Anybody and for any reason.
4 ANY print or diffusion REQUEST HAS to be APPROVED by Frederic Tapissier /AVEX.
5 No modification of the data, particularly the colors and the range of samples, the exploitation size of these maps cannot be operated without the authorization of Frederic Tapissier.
6 These PDF are protected by Copyrights and other electronic marks, and are protected against modifications and the exportations of the contained data.
7 The author cannot be considered as responsible of the use of this data in any way.
8 The author does not guarantee the precision of the data wich are approximative, the values are obtained arithmetically. This document cannot be considered as an official basis for any work, and declines any responsibility for past, present and future use and the interpretation of these data.
some picture from the work