nadid to nadir

source/large.rst

@@ -211,7 +211,7 @@ Data collection effort, 2D and 2.5D products
 
 For best in class results 2D and 2.5D products and 5cm resolution, it is feasible to collect 2-4km\ :sup:`2` per person, per day. This requires the following set of flights:
 
-* 70-80% overlap slightly off-nadir (5-10 degree off nadid)
+* 70-80% overlap slightly off-nadir (5-10 degree off nadir)
 
 For more complex buildings and vegetation, aim for closer to 80% overlap. If buildings, vegetation, and terrain changes are not complex, it's quite feasible to use closer to 70% overlap.