Leica FlexLine Manual page 24

Grades
Known
• Coordinates and grade elevation of station
• Coordinates and grade elevation of backsight point
• Slope gradient, station to foresight point
• Height difference (dH) between current gradeline and new gradeline
Unknown
• Stake out height difference (dHgt) between measured point and gradeline point
• Horizontal distance (dHD) along the foresight line
Slope gradient
a
h
d
TSOX_Mining_006
Height difference
P0
a
b dH
H
TSOX Mining 007
a Gradeline
h Height
d Vertical distance
P1
P0 Station
P1 Foresight point
a New gradeline
b Current gradeline
H Current height of gradeline above mine floor
dH Height difference between current gradeline
and new gradeline
FlexLine/FlexLine plus, 24