Night Light of Alvin (Texas) from space (United States) Src. Average luminocity for 10x10km area is 57.3409% and for 50x50km: 46.043%.
Square area 10x10 km:
 4.17%
 4.17% 7.01%
 7.01% 2.84%
 2.84% 12.12%
 12.12% 14.77%
 14.77% 21.78%
 21.78% 16.1%
 16.1% 14.02%
 14.02% 6.25%
 6.25% 0.95%
 0.95% 0%
 0%Square area 50x50 km:
 8.18%
 8.18% 9.99%
 9.99% 7.23%
 7.23% 8.97%
 8.97% 7.71%
 7.71% 7.04%
 7.04% 5.44%
 5.44% 4.84%
 4.84% 3.1%
 3.1% 6.26%
 6.26% 31.24%
 31.24%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
30° 2' 3.9" North, 95° 56' 50" West
29° 25' 25.9" North, 95° 14' 38.8" West
28° 48' 34.5" North, 94° 32' 27.5" West
Some cities around Alvin sort by population:
• Pearland
		16.1 km =10 mi,  345°
345°
• League City
		17.2 km =10.7 mi,  57°
57°
• Friendswood
		12.5 km =7.8 mi,  19°
19°
• Dickinson
		19.1 km =11.9 mi,  77°
77°
• Fresno
		23.5 km =14.6 mi,  303°
303°
• Santa Fe
		14.3 km =8.9 mi,  110°
110°
• Webster
		17.6 km =10.9 mi,  43°
43°
• Manvel
		11.8 km =7.3 mi,  291°
291°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016