← Notedeck
All engines
·
测量学·大地测量
en
zh-CN
zh-TW
ja
ko
fr
de
es
pt-BR
tr
it
ar
测量学·大地测量
12
engines
Closed traverse — misclosure & Bowditch adjustment
Closed traverse — misclosure & Bowditch adjustment
纬距/经距 · 闭合差√(ΣL²+ΣD²) · Bowditch平差
Latitudes & departures, linear misclosure, and the compass-rule adjustment
Differential leveling — Height-of-Instrument method
Differential leveling — Height-of-Instrument method
视线高HI法 · RL+BS=HI/HI−FS=RL · ΣBS−ΣFS校核
Reduce the level book (RL + BS = HI, HI − FS = RL) with the arithmetic check
Bearings & azimuths — quadrantal, back bearing, included angle
Bearings & azimuths — quadrantal, back bearing, included angle
WCB↔象限角 · 反方位角±180° · 夹角
Convert whole-circle bearing ⇄ quadrantal, take the back bearing, and the angle between lines
Theodolite horizontal angle · face-left / face-right
Theodolite horizontal angle · face-left / face-right
盘左盘右 · 水平角取平均消误差 · 度分秒运算
Mean of both faces cancels collimation & trunnion-axis errors
Stadia tacheometry · distance & height from the staff
Stadia tacheometry · distance & height from the staff
D=K·s·cos²θ+C·cosθ · V=½K·s·sin2θ · K=100
D = K·s·cos²θ + C·cosθ, V = ½·K·s·sin2θ, ΔH = V + hi − m
Triangulation chain · sine rule from a baseline
Triangulation chain · sine rule from a baseline
基线+正弦定理 · 三角锁推算未知边
a / sinA = b / sinB = c / sinC · carry one baseline to a distant point
Horizontal circular curve
Horizontal circular curve
T=R·tan(Δ/2) · L=RΔ · 中矢M/外距E · 曲线度
Circular curve joining two tangents · exact curve elements from R and Δ
Vertical curve (parabolic)
Vertical curve (parabolic)
抛物线竖曲线 · 纵坡g1/g2 · 高/低点x=−g1L/(g2−g1)
Equal-tangent parabola joining grade g1 to g2 · crest / sag profile
Superelevation on a curve
Superelevation on a curve
e+f=V²/127R · 超高率 · 加宽 · 力三角
Banked road: e + f = V²/(127R) · force triangle of gravity, normal, friction
Parcel area by coordinates
Parcel area by coordinates
鞋带公式½|Σ(xᵢyᵢ₊₁−xᵢ₊₁yᵢ)| · 宗地面积
Shoelace (Gauss) method · A = ½|Σ(xᵢyᵢ₊₁ − xᵢ₊₁yᵢ)|
Earthwork volume
Earthwork volume
平均端面积V=L(A1+A2)/2 · 棱柱体改正
Average-end-area vs prismoidal (Simpson) along the alignment
Three-point resection (Tienstra)
Three-point resection (Tienstra)
三点后方交会 · 两角定测站坐标 · Collins/Tienstra
Locate an unknown station P from two angles to three known control points