2.6. Survey Calculator

The Survey Calculator is a collection of small, focused calculators hosted in one tool. It is found under Calculations > Survey Calculator in the sidebar. Select a calculator from the list on the left; it opens in the panel on the right.

Available calculators:

• Free Station — station position and orientation by least-squares resection from known points.

• Resection — teramon-faithful resection: station X, Y, Z and orientation by least-squares from raw two-face directions and distances to known points, with teramon .rs1/.rs2/.res import.

• Precise Trig Leveling — reciprocal trigonometric leveling with curvature/refraction cancellation and height propagation.

• OMA L4 (Athens Metro) — coordinate conversion between the Athens Metro Line 4 local grid (OMA), the Greek state grid EGSA’87, and WGS84 (three flavours).

• Greek Projections — precise tachymetric coordinates in the Greek reference systems (EGSA’87, TM3, UTM, HATT, LOCAL) from station/backsight setups and total-station measurements, with a multi-station field book, Excel import/export, a coordinates list and a plan-view sketch.

• 2.6.1. Free Station
  • 2.6.1.1. Overview
  • 2.6.1.2. Inputs
  • 2.6.1.3. What Compute does
  • 2.6.1.4. Results
  • 2.6.1.5. Import / Export
  • 2.6.1.6. Notes
• 2.6.2. Resection
  • 2.6.2.1. Overview
  • 2.6.2.2. Inputs
  • 2.6.2.3. What Compute does
  • 2.6.2.4. Results
  • 2.6.2.5. Import / Save / Load
  • 2.6.2.6. Notes
• 2.6.3. Precise Trig Leveling
  • 2.6.3.1. Overview
  • 2.6.3.2. Inputs
  • 2.6.3.3. Mathematics
  • 2.6.3.4. Results
  • 2.6.3.5. Import
  • 2.6.3.6. Notes
• 2.6.4. OMA L4 (Athens Metro)
  • 2.6.4.1. Overview
  • 2.6.4.2. Conversion directions
  • 2.6.4.3. Coordinate system definitions
  • 2.6.4.4. OMA ↔ EGSA’87 similarity parameters
  • 2.6.4.5. Real-world WGS84 chain
  • 2.6.4.6. TBC “global grid” parameters (compatibility only)
  • 2.6.4.7. Using the calculator
  • 2.6.4.8. Worked examples
  • 2.6.4.9. Limitations
  • 2.6.4.10. References
• 2.6.5. Greek Projections
  • 2.6.5.1. Overview
  • 2.6.5.2. The field-book model
  • 2.6.5.3. Measurements tab
  • 2.6.5.4. What Solve does
  • 2.6.5.5. Coordinates tab
  • 2.6.5.6. Sketch tab
  • 2.6.5.7. Options tab
  • 2.6.5.8. Import / Export
    • 2.6.5.8.1. Excel workbooks
    • 2.6.5.8.2. Geodimeter raw job files
  • 2.6.5.9. Worked example
  • 2.6.5.10. Projection constants and notes