Surface Grades; Slopes; Surfaces - Leica Captivate Technical Reference Manual

Surface grades

Slopes

Surfaces

688
Surface grades are defined by two lines. The two lines define the right and left
edge of the surface grade. One of the two lines is used as the reference line.
a
Road_004
a Surface grade to stake out or check
b Reference line
c Horizontal offset to reference line
d Height difference to reference line
e Height difference to expanded surface grade
Slopes, like surface grades, are defined by two lines. Different to surface
grades, only one edge of the slope, the hinge point, is known. The second
edge, catch point or daylight point, is defined by the intersection of the slope
and the natural surface. As the natural surface is unknown this edge can only
be staked out in the field. Finding and staking out the catch point is the most
important task when working with slopes.
a
f
Road_005
a Centreline
b Slope
c Hinge Point
d Second line defining the slope
e Catch point
f Natural surface
g Δ Offset from the slope
h Height difference from the slope
There are two types of surfaces supported that represent a three-dimensional
design:
DTM / TIN (Digital Terrain Model; Triangular Irregular Network)
•
• Layer
c
b
d
e
c
b
g
h
d
e
Roads - General