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L. Reduction Example: UTM
1. Preliminary Calculations
a. Survey Data
This chapter covers measurements reduction for a UTM cylindric zone.,
The survey data and UTM grid information for point Jerry are summarized in Figure L1 and Table L1.
Figure L1 Survey Data 
Table L1 Orthometric Heights 

Point 
H, ft 
Jerry  1177 
A1 
1805 
B7 
1340 
b. Lengths, Coordinates and Orthometric Heights
Convert lengths and orthometric heights to meters; compute approximate UTM coordinates of A1 and B7.
Point A1
Point B7
Point Jerry
From its datasheet: orthometric height is 358.6 m.