Night Light of Union City (California) from space (United States) Src. Average luminocity for 10x10km area is 66.0867% and for 50x50km: 43.8611%.
Square area 10x10 km:
 16.33%
 14.97%
 9.01%
 14.46%
 9.86%
 5.27%
 4.08%
 4.93%
 11.22%
 9.01%
 0.85%Square area 50x50 km:
 11.47%
 9.62%
 2.54%
 4.95%
 6.07%
 7.04%
 5.09%
 4.67%
 10.96%
 15.76%
 21.83%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
38° 9' 2.8" North, 122° 43' 20.1" West
37° 35' 44.8" North, 122° 1' 8.9" West
37° 2' 11.7" North, 121° 18' 57.6" West
Some cities around Union City sort by population:
• Fremont
		5.9 km =3.7 mi, 
152°
• Hayward
		9.8 km =6.1 mi, 
326°
• Castro Valley
		12.4 km =7.7 mi, 
331°
• Newark
		7.6 km =4.7 mi, 
194°
• San Lorenzo
		13.3 km =8.3 mi, 
315°
• Ashland
		13.8 km =8.6 mi, 
322°
• Cherryland
		11.9 km =7.4 mi, 
321°
• Fairview
		9.5 km =5.9 mi, 
345°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016