Class information for:
Level 2: LIGHT POLLUTION//DMSP OLS//NIGHTTIME LIGHTS

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
12 4 COMPUTER SCIENCE, THEORY & METHODS//COMPUTER SCIENCE, INFORMATION SYSTEMS//COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE 1181119
691 3       COLOR RESEARCH AND APPLICATION//LIGHT POLLUTION//MUNSELL COLOR SCI 8415
3614 2             LIGHT POLLUTION//DMSP OLS//NIGHTTIME LIGHTS 1365
14375 1                   LIGHT POLLUTION//DMSP OLS//NIGHTTIME LIGHTS 805
18770 1                   ROAD LIGHTING//LIGHTING RESEARCH & TECHNOLOGY//STREET LIGHTING 560

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 LIGHT POLLUTION authKW 2050722 10% 63% 142
2 DMSP OLS authKW 1029396 4% 84% 53
3 NIGHTTIME LIGHTS authKW 805940 4% 73% 48
4 LIGHTING RESEARCH & TECHNOLOGY journal 490693 7% 21% 99
5 STREET LIGHTING authKW 451693 2% 65% 30
6 ROAD LIGHTING authKW 441268 2% 66% 29
7 NIGHT LIGHTS authKW 374015 1% 90% 18
8 SKY GLOW authKW 323226 1% 100% 14
9 LIGHTING address 277381 4% 23% 52
10 NIGHT SKY BRIGHTNESS authKW 207788 1% 100% 9

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Remote Sensing 22372 18% 0% 243
2 Imaging Science & Photographic Technology 7941 11% 0% 150
3 Construction & Building Technology 6604 12% 0% 165
4 Optics 3408 22% 0% 296
5 Ergonomics 3078 5% 0% 62
6 Transportation 1736 4% 0% 49
7 Transportation Science & Technology 1056 4% 0% 50
8 Geography, Physical 881 5% 0% 62
9 Astronomy & Astrophysics 621 10% 0% 138
10 Engineering, Civil 431 6% 0% 76

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 LIGHTING 277381 4% 23% 52
2 GEOPHYS DATA 173363 3% 19% 40
3 LIGHTING UNIT 97767 1% 35% 12
4 EARTH OBSERVAT GRP 76369 1% 22% 15
5 GRP LIGHTING TECHNOL SAFETY SUSTAINABIL 72145 0% 63% 5
6 VIRTUAL ENVIRONM IMAGING TECHNOL 70698 1% 44% 7
7 LIGHTING TECHNOL 64474 1% 31% 9
8 WHITELY PSYCHOL S 52768 0% 57% 4
9 EXCELLENCE LASER SCANNING COE LASR 46175 0% 100% 2
10 INVEST DR JOSE MARIA LUIS MORA 46175 0% 100% 2

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 LIGHTING RESEARCH & TECHNOLOGY 490693 7% 21% 99
2 JOURNAL OF THE ILLUMINATING ENGINEERING SOCIETY 188828 5% 13% 63
3 LEUKOS 114157 2% 15% 32
4 LIGHT & ENGINEERING 99699 2% 14% 32
5 REMOTE SENSING 24696 5% 2% 66
6 GISCIENCE & REMOTE SENSING 9803 1% 3% 13
7 INTERNATIONAL JOURNAL OF REMOTE SENSING 8461 4% 1% 60
8 PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 6532 3% 1% 39
9 JOURNAL OF SAFETY RESEARCH 4572 1% 1% 16
10 OBSERVATORY 3790 1% 2% 11

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 LIGHT POLLUTION 2050722 10% 63% 142 Search LIGHT+POLLUTION Search LIGHT+POLLUTION
2 DMSP OLS 1029396 4% 84% 53 Search DMSP+OLS Search DMSP+OLS
3 NIGHTTIME LIGHTS 805940 4% 73% 48 Search NIGHTTIME+LIGHTS Search NIGHTTIME+LIGHTS
4 STREET LIGHTING 451693 2% 65% 30 Search STREET+LIGHTING Search STREET+LIGHTING
5 ROAD LIGHTING 441268 2% 66% 29 Search ROAD+LIGHTING Search ROAD+LIGHTING
6 NIGHT LIGHTS 374015 1% 90% 18 Search NIGHT+LIGHTS Search NIGHT+LIGHTS
7 SKY GLOW 323226 1% 100% 14 Search SKY+GLOW Search SKY+GLOW
8 NIGHT SKY BRIGHTNESS 207788 1% 100% 9 Search NIGHT+SKY+BRIGHTNESS Search NIGHT+SKY+BRIGHTNESS
9 ARTIFICIAL LIGHT AT NIGHT 185790 1% 62% 13 Search ARTIFICIAL+LIGHT+AT+NIGHT Search ARTIFICIAL+LIGHT+AT+NIGHT
10 NIGHTTIME LIGHT IMAGERY 164177 1% 89% 8 Search NIGHTTIME+LIGHT+IMAGERY Search NIGHTTIME+LIGHT+IMAGERY

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 2


rank cluster_id2 link
1 2361 COLOR RESEARCH AND APPLICATION//MUNSELL COLOR SCI//COLOR CONSTANCY
2 492 ACCIDENT ANALYSIS AND PREVENTION//TRANSPORTATION//ERGONOMICS
3 1863 URBAN HEAT ISLAND//GREEN ROOF//URBAN CLIMATE
4 1817 CHIROPTERA//ACTA CHIROPTEROLOGICA//BATS
5 304 ENERGY AND BUILDINGS//BUILDING AND ENVIRONMENT//CONSTRUCTION & BUILDING TECHNOLOGY
6 43 REMOTE SENSING//IMAGING SCIENCE & PHOTOGRAPHIC TECHNOLOGY//INTERNATIONAL JOURNAL OF REMOTE SENSING
7 1158 CHINA QUARTERLY//CHINA//AREA STUDIES
8 3064 AGENT BASED MODEL//SLEUTH//URBAN GROWTH
9 292 VISION RESEARCH//OPHTHALMOLOGY//AMBLYOPIA
10 2388 SEA TURTLE//CHELONIA MYDAS//CARETTA CARETTA

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