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visits member for 2 years, 9 months
seen Mar 14 at 13:55

Mar
4
comment Why is the GPS Reference Meridian 100m to the East of the Prime Meridian?
a hundred meters in londen, equator or at the pole?
Dec
6
awarded  Citizen Patrol
Nov
19
comment Why does GPS positioning require four satellites?
technically you can leave out the 4th if you assume you at the point which is closer to 6,371 km away from the center of the earth (only works for ground bound devices)
Nov
30
comment Why Do Colors Look Darker When Printed on Paper?
they can look different on 2 monitors of the same make if the settings are different
Mar
24
answered How do you explain what GIS is?