Night Light of San Marcos (Hidalgo) from space (Mexico) Src. Average luminocity for 10x10km area is 66.6786% and for 50x50km: 29.45%.
Square area 10x10 km:
 6.75%
 8.53%
 13.49%
 18.85%
 22.22%
 8.53%
 6.94%
 6.35%
 7.74%
 0.6%
 0%Square area 50x50 km:
 1.31%
 2.04%
 4.24%
 5.54%
 8.69%
 4.81%
 6.32%
 6.78%
 9.02%
 13.67%
 37.58%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
20° 41' 23.1" North, 100° 2' 19" West
20° 1' 50" North, 99° 20' 7.7" West
19° 22' 6.9" North, 98° 37' 56.5" West
Some cities around San Marcos sort by population:
• Tepeji del Río de Ocampo
		14 km =8.7 mi, 
183°
• Tula de Allende
		2.5 km =1.6 mi, 
339°
• El Llano
		4.2 km =2.6 mi, 
22°
• Tlaxcoapan
		13.8 km =8.6 mi, 
60°
• Cardonal
		11.4 km =7.1 mi, 
75°
• Atotonilco de Tula
		12.5 km =7.8 mi, 
101°
• Doxey
		11.8 km =7.3 mi, 
54°
• Atitalaquia
		12.3 km =7.6 mi, 
74°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016