CE Tools
Surveyor's Toolkit
Mobile-ready parcel area, traverse closure, COGO, leveling, curve, slope, and stationing tools with visual checks and field-oriented calculations.
Land Area + Traverse + Subdivision
One parcel state with synchronized Coordinates, Bearing, and Azimuth representations, closure diagnostics, image overlays, subdivision, save/load, and reporting.
Compact quadrant bearing input: N/S, degrees, minutes, seconds, E/W, then distance.
| From–To | N/S | Deg | Min | Sec | E/W | Distance (m) | Actions |
|---|---|---|---|---|---|---|---|
| A–B | |||||||
| B–C | |||||||
| C–D | |||||||
| D–A |
Area
8,000.000 m²
Hectares
0.800000 ha
Perimeter
360.000 m
Centroid
N 1,040.00 / E 1,050.00
Misclosure
0.0000 m
Closed within numerical tolerance
Relative precision
Closed
Traverse length ÷ linear misclosure.
Latitude error ΔN
-0.0000 m
Departure error ΔE
0.0000 m
Adjustment
Bowditch
By course length.
Geometry source
Observed courses
Parcel subdivision
Split the parcel with a straight north–south or east–west line to reach a target percentage or target area.
This is a geometric planning aid. Legal subdivision still requires applicable surveying, access, zoning, monumentation, and approval requirements.
Final coordinate schedule
| Point | Northing | Easting | Next bearing | Distance |
|---|---|---|---|---|
| A | 1,000.0000 | 1,000.0000 | E | 100.000 m |
| B | 1,000.0000 | 1,100.0000 | N | 80.000 m |
| C | 1,080.0000 | 1,100.0000 | W | 100.000 m |
| D | 1,080.0000 | 1,000.0000 | S | 80.000 m |
Coordinate geometry
Solve plane-coordinate inverse/forward problems using northing/easting in metres. Forward azimuth is measured clockwise from north; a coincident inverse has no defined direction.
Closed traverse + Bowditch adjustment
Enter horizontal distances and azimuths measured clockwise from north. Choose a loop traverse or a link traverse closing on known control. Bowditch distributes coordinate misclosure by leg length and is appropriate when angular and distance observations have comparable precision.
| Leg | Azimuth | Distance | Latitude | Departure | Corr. Lat. | Corr. Dep. | Adj. Northing | Adj. Easting | Actions |
|---|---|---|---|---|---|---|---|---|---|
| AB | 0.000 | 100.000 | -0.0623 | 0.0249 | 999.938 | 1,100.025 | |||
| BC | -80.000 | 0.000 | -0.0498 | 0.0199 | 919.888 | 1,100.045 | |||
| CD | 0.174 | -99.950 | -0.0623 | 0.0249 | 920.000 | 1,000.120 | |||
| DA | 80.050 | -0.140 | -0.0499 | 0.0199 | 1,000.000 | 1,000.000 |
Differential leveling
Height-of-Instrument method. The closing benchmark is optional; when supplied, the calculator reports the observed closure error.
| Setup | BS (m) | FS (m) | Start RL | HI | Next RL | Actions |
|---|---|---|---|---|---|---|
| Setup 1 | 100.000 | 101.455 | 100.500 | |||
| Setup 2 | 100.500 | 101.725 | 100.650 |
Slope and distance reduction
Compute grade from rise and horizontal run, or reduce a measured slope distance using a vertical angle measured from the horizontal. Positive vertical angles are uphill; negative angles are downhill.
Simple circular curve
Compute standard elements of a simple circular curve. Choose the station convention before entering PI chainage; PC = PI − T and PT = PC + L. Station equations are not applied.
Stationing convention
Use the same convention as the project plans. The repository lessons recognize 1000 m, 100 m, and 20 m stationing. This calculator assumes continuous stationing and does not model ahead/back station equations.
Add / subtract station distance
Distance between stations
Results are calculation aids. Confirm units, instrument conventions, field observations, control data, and applicable professional requirements before using values for survey deliverables or setting-out work.