UK Light pollution Map
will be translated soon
Bien après tout le monde, voici les cartes de pollution lumineuse d’un partie du Royaume Uni. Je ne les avais pas faites, car je ne pensais pas qu’il y avait une attente au Royaume Uni sur ce type de données.
L’astronomie y étant encore plus difficile dans ce Pays qu’en France de part les conditions météo, je me suis tout de même fait la remarque bien que les conditions atmosphérique ne sont probablement pas idéale, il était injuste que les rares moments ou il faisait beau, ils ne puissent observer dans les meilleurs conditions.
Ensuite est venue 1 demande, une seconde, puis 4 demandes en moins d’un moi. Il y a donc bien une attente a ce sujet et je m’y colle donc.
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.
Quelques réflexions
Je me suis attardé que sur la grosse ile, je n’a pas traité l’Irlande (pour le moment)
Angleterre, l’Ecosse, le Pays de Galles sont donc couverts par les carte de pollution lumineuse
J’ai traité les cartes de la manière suivante
I rendered maps in different folowing ways:
- A- PDF « échelle de couleur » « Color scale » map
- carte de pollution lumineuse + topographie + relief
Visual observation light pollution map + topography + reliefPDF map
Googlemap like navigator
- carte de pollution lumineuse + relief
Light pollution map + relief (in Jully 2009, not yet ready)
- carte de pollution lumineuse pour CCD et Astrophotographie
Map for astrophoto & CCD
PDF map
Googlemap like navigator
- B- PDF « Sodium » (not yet ready)
1. carte de pollution lumineuse + topographie + relief
Light pollution map + topography + relief (for public demo)
2. carte de pollution lumineuse + relief
Light pollution map + relief
.
- C- Google Earth files
Télécharger le Fichier KMZ compatible avec Google earth
Soon : CCD google earth MAP
De part de récent progrès dans la gestion des données, les cartes dans google earth ont tres sensiblement améliorée précisions de placement.
Toute fois les données d’urbanisation dont je dispose étant relativement incomplètes, il manque certain petit villages qui -après vérification- disposent de luminaires ! et donc dans le zones rurales, certain émetteurs de pollution lumineuse ne figurent pas sur les cartes. J’en suis désolé mais à ce jour je n’ai aucun moyen de faire autrement
Following recent advances in data management, maps in Google Earth have significantly improved their positioning precision.
Any
time, 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 $)
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This map try to show us the sky quality useable by a training observer. Precautions of interpretation :This map is good only for a zenithal cone of 50° (from the vertical of a precise location) and don’t show the light pollution toward the horizon. To consider the value indicate on the map, it’s understood that the observer may have not to be expose himself to a direct light source and he have to be sheltered from a direct light source. The precision of the data are not guarantee : this is indicated values and obtain with arithmetic and non-based from reality. Locals phenomenas as lighting of monuments or public buildings, or at the contrary the extinction of the light from a certain time can elude the data.This map show the light pollution at the time of 23:00, during winter, with a midle quantity of humidity around 85 percent. The highway, due to the cars light are systematicaly counted as a source of light pollution. Moreover, the glowing due the cars crossing can reduce to nothing around 20 minutes the nocturn vision of the observer and the quality of the local seeing. Aquatic places don’t have to be take in consideration : the light propagation of the light glare was voluntary reduce in a clearness concern. This map show the urban places : artisanal places, industrial places, residential places and some big building (nuclear central i.e).The elevation play a dominant role on the light propagation : more the observer is high, less the light diffusion is important. In this way, a city located below an observation point at 1000m higher will affect less the air quality for the observer contrary to if this last was been in plain (at the same level of the light source).The effect of the elevation are semi-logarithmic : the first thousand of meters have an important role on the air quality. |
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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 WHICH 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 useE and the interpretation of these data.
some picture from the work
about me….
[…] a while to download to it’s full resolution so give it time.And there’s even more here: http://avex.org.free.fr/dossiers/?page_id=127 These maps are produced by Frederic Tapissier in France. However, it must be pointed out that […]