Computing Horizontal Distances From Slope Distances - Leica GPS1200 Series Technical Reference Manual

Survey - Hidden Points
46.5
Description
Diagram
Computing horizontal
distances from slope
distances step-by-step

Computing Horizontal Distances from Slope Distances

The horizontal distance for a hidden point measurement can be computed using a slope
distance, and an elevation angle or percentage grade. The slope distance and the elevation
angle can either be typed in or measured with a hidden point measurement device.
d1
d2
P0
GPS12_87
Step Description
1. Refer to "46.2 Accessing Hidden Point Measurement" to access HIDDEN PT
Hidden Point Measurement.
2. HIDDEN PT Hidden Point Measurement
Select <Method: Brng & Distance>, <Method: Double Distance> or <Method:
Back Brng & Dist>.
3. Highlight <Horiz Dist:>.
GPS1200
P1
P0 Known point
P1 Hidden point
d1
d2
α
Slope distance
Horizontal distance
Elevation angle
1252