Night Light of Katy (Texas) from space (United States) Src. Average luminocity for 10x10km area is 82.4187% and for 50x50km: 49.3618%.
Square area 10x10 km:
 22.02%
 22.02% 21.83%
 21.83% 19.84%
 19.84% 14.09%
 14.09% 11.31%
 11.31% 3.17%
 3.17% 3.17%
 3.17% 3.57%
 3.57% 0.99%
 0.99% 0%
 0% 0%
 0%Square area 50x50 km:
 15.65%
 15.65% 13.45%
 13.45% 7.74%
 7.74% 6.72%
 6.72% 4.36%
 4.36% 2.92%
 2.92% 2.79%
 2.79% 3.01%
 3.01% 3.53%
 3.53% 6.1%
 6.1% 33.72%
 33.72%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
30° 23' 39" North, 96° 31' 39.1" West
29° 47' 8.8" North, 95° 49' 27.8" West
29° 10' 25.3" North, 95° 7' 16.6" West
Some cities around Katy sort by population:
• Alief
		23.5 km =14.6 mi,  110°
110°
• Mission Bend
		18.5 km =11.5 mi,  123°
123°
• Cinco Ranch
		8.3 km =5.2 mi,  129°
129°
• Pecan Grove
		19.9 km =12.4 mi,  153°
153°
• Four Corners
		20.7 km =12.9 mi,  129°
129°
• Richmond
		23.5 km =14.6 mi,  164°
164°
• Fulshear
		12.9 km =8 mi,  214°
214°
• Brookshire
		12.2 km =7.6 mi,  270°
270°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016