Bearings & coordinates
Checks & adjustment
Levels
Curves & units
Coordinates
Traverse Legs
Traverse Coordinates
Traverse Plot
Point 1 — From
Point 2 — To
Result
Bearing
Distance
Start Point
Legs
Radiation
Pt 1
Calculated Points
Method
Add Reading
Levelling Book
| Point | BS | IS | FS | HI | Rise | Fall | RL | Adj. RL |
|---|
Baseline Definition
Offset Points
Point IDChainageOffset (L−, R+)
Calculated Coordinates
Project Manholes
Pipe Inverts
MH Centre RL
Plan View
Pipe Invert Levels
Known Values
Enter Radius plus either Delta or Arc Length — the other will be calculated.
Curve Elements
Delta Angle (Δ)
Radius (R)
Arc Length (L)
Tangent Length (T)
Long Chord (LC)
Mid-Ordinate (M)
External Dist (E)
Curve Geometry
PC Point & Alignment
Set-Out Options
Set-Out Points
| Point | Chainage | Northing (Y) | Easting (X) | Bearing |
|---|
Point 1 & Bearing 1
Point 2 & Bearing 2
Point 1 (Bearing From)
Point 2 (Distance From)
Point 1 & Distance 1
Point 2 & Distance 2
Enter bearings in D.MS format (e.g. 90.2030)
Bearing 1
Bearing 2
Half Angle
Input Vectors
Results
Resultant Bearing
Resultant Distance
Tolerance (Rule 19)
Total Δ Northing
Total Δ Easting
Misclose
| # | Links (li) | Meters (m) |
|---|
1 link = 0.201168 m · Enter to add row
| # | Sq Meters (m²) | Hectares (ha) | Acres (ac) |
|---|
1 ha = 10,000 m² · 1 ac = 0.404686 ha · Enter to add row
Tolerance
"
How to use Ray Trace
Checks the orientation of a setup. For each reference mark, your observed bearing is compared with its deposited (plan) bearing. The difference is the swing. The mean swing is the orientation correction, and any mark whose swing sits outside the tolerance is flagged.
Steps
- Bearings mode: for each mark, enter the observed bearing and the deposited bearing off the plan. Coordinates mode: enter the instrument station's northing and easting, then each mark's coordinates, and the deposited bearing is worked out for you.
- Add the observed and deposited distances as well to get a scale factor and a misclose for each mark. Tap m / links to switch units.
- Set the tolerance in seconds (top right).
- Press Calculate Bearing Swing. Untick a mark to leave it out of the mean. The chart shows each mark's swing, with the ones outside tolerance in red.
- Enter a job number and press Save to keep it, or Print PDF for the job file.
Tips
- Bearings are
DD.MMSS:123.4530is 123°45′30″. You can type sums, e.g.123.4530+180. - Distances add up:
10.2+5.35. End withLto enter links. - Use the ⛓ chain button when a deposited vector has to be built from several legs off the plan.
- The app always opens empty. New starts again, and Load saved… reopens a saved job or your last unsaved session.
Reference Marks
Swing Distribution
Survey class:
ZM = survey mark · PEG = peg/boundary point
How to use RCS Check
Checks observed vectors against the plan (record) vectors under the Cadastral Survey Rules 2021. For each line it works out the vector difference, the gap between where your observation puts the far end and where the plan puts it, and tests it against the tolerance for the survey class and the type of marks at each end.
Steps
- Pick the survey class: A, B or C.
- Add your observations, either way:
- + Add row manually, then type From, To, the observed bearing and the observed distance, or
- paste rows from a TBC inverse report and press Import.
- On each row, type the plan bearing and plan distance. If the plan vector has to be built from several legs, press ⛓ chain and enter the legs.
- Check each end is labelled correctly: ZM for a survey mark, PEG for a peg or boundary point. It's guessed from the name, so tap the badge to change it. The label decides which tolerance applies.
- Read the Vector Diff against the Tolerance. Pass? shows Yes or No.
- Enter a job number and press Save, or Print PDF for the job file.
Tolerances used
- Mark to mark (R20): 0.025 m + 50 ppm of the distance.
- Mark to peg (R21): A 0.030 m, B 0.200 m, C 0.600 m.
- Peg to peg (R27): A 0.06 m + 150 ppm, B 0.30 m + 600 ppm, C 1.00 m + 3000 ppm.
Tips
- Bearings are
DD.MMSS:123.4530is 123°45′30″. - Distances add up:
10.2+5.35. End withLto enter links. - ↩ next to an observed bearing means it was measured the other way along the line, so it was turned 180° to compare.
- Drag ⠿ to reorder rows. The app always opens empty. New starts again, and Load saved… reopens a saved check or your last unsaved session.
- On tools.gondihq.com, a save is kept on this device only.
Add observations
…or import from a TBC inverse report
Copy rows directly from the TBC inverse report (tab-separated). Columns used: From, To, Ellipsoid Distance (col 4), Grid Azimuth (col 5).