Night Light of Contra Costa Centre (California) from space (United States) Src. Average luminocity for 10x10km area is 64.7354% and for 50x50km: 37.8764%.
Square area 10x10 km:
 11.53%
 11.36%
 5.84%
 5.84%
 16.07%
 24.03%
 12.66%
 5.84%
 6.82%
 0%
 0%Square area 50x50 km:
 7.28%
 6.53%
 2.15%
 4.64%
 6.21%
 7.61%
 6.58%
 5.45%
 12.76%
 15.51%
 25.3%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
38° 28' 48.1" North, 122° 45' 39.6" West
37° 55' 39.1" North, 122° 3' 28.3" West
37° 22' 14.9" North, 121° 21' 17.1" West
Some cities around Contra Costa Centre sort by population:
• Concord
		6.1 km =3.8 mi, 
22°
• Walnut Creek
		2.4 km =1.5 mi, 
194°
• Pleasant Hill
		2.3 km =1.4 mi, 
353°
• Lafayette
		7 km =4.3 mi, 
228°
• Alamo
		8.9 km =5.5 mi, 
165°
• Clayton
		10.8 km =6.7 mi, 
82°
• Waldon
		0.2 km =0.1 mi, 
123°
• Saranap
		5 km =3.1 mi, 
198°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016