Iiyama night lights from space
Night Light of Iiyama (Nagano) from space (Japan) Src. Average luminocity for 10x10km area is 5.1818% and for 50x50km: 4.3841%.
Analysis of Iiyama night lights 2016
Square area 10x10 km:
100 
0.16%
90-99 0.49%
80-89 0%
70-79 0.65%
60-69 1.95%
50-59 0.65%
40-49 1.95%
30-39 0.81%
20-29 1.14%
10-19 0.65%
0-9 91.56%
0.16%90-99
0.49%80-89
0%70-79
0.65%60-69
1.95%50-59
0.65%40-49
1.95%30-39
0.81%20-29
1.14%10-19
0.65%0-9
91.56%Square area 50x50 km:
100 0.24%
90-99 0.57%
80-89 0.43%
70-79 0.59%
60-69 0.71%
50-59 0.85%
40-49 0.82%
30-39 0.7%
20-29 1.43%
10-19 2.49%
0-9 91.17%
0.24%90-99
0.57%80-89
0.43%70-79
0.59%60-69
0.71%50-59
0.85%40-49
0.82%30-39
0.7%20-29
1.43%10-19
2.49%0-9
91.17%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 24' 38.1" North, 137° 39' 48.8" East
36° 51' 0" North, 138° 22' 0" East
36° 17' 7" North, 139° 4' 11.3" East
Some cities around Iiyama sort by population:
• Nagano
27.6 km =17.1 mi, 
216°
• Jōetsu
35.1 km =21.8 mi, 
340°
• Suzaka
22.7 km =14.1 mi, 
191°
• Nakano
11.1 km =6.9 mi, 
180°
• Tōkamachi
47.5 km =29.5 mi, 
48°
• Arai
20.9 km =13 mi, 
323°
• Shiozawa
47.6 km =29.6 mi, 
64°
• Hakuba
48 km =29.8 mi, 
249°
1861838 (p: 25,281)
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016