Calculator

The Calculator tab on the Measurements page provides three calculation modes for office-based coordinate work: Point-to-Point, Radial, and Traverse. Each mode supports multiple coordinate formats, displays results on a Leaflet map preview, and lets you copy results to the clipboard.

Calculation Modes

The calculator offers three modes, each designed for a different type of coordinate calculation. Select the mode using the tabs at the top of the calculator panel.

Point-to-Point

Calculate the distance and bearing between two entered coordinates.

1. Enter Point A coordinates in your preferred format
2. Enter Point B coordinates in your preferred format
3. The results update instantly showing:
   • Horizontal distance (metres)
   • Bearing from A to B (degrees)
   • Reverse bearing from B to A (degrees)
   • Coordinate difference (delta Easting, delta Northing for grid coordinates)

Radial

Calculate the position of a point given a starting coordinate, distance, and bearing.

1. Enter the origin point coordinates
2. Enter the distance (metres)
3. Enter the bearing (degrees from north)
4. The results show:
   • Calculated point coordinates in all supported formats
   • The point plotted on the map preview

This is useful for setting out points from a known position.

Traverse

Calculate sequential legs from a starting point, building up a traverse path.

1. Enter the start point coordinates
2. Add legs by entering a distance and bearing for each leg
3. Each leg calculates the next point from the end of the previous leg
4. The results show:
   • All calculated points with their coordinates
   • Total traverse distance
   • Misclose (the distance between the last point and the start, if closing a loop)
   • The full traverse path on the map preview

💡 Tip

Use the Traverse mode to check a set of field measurements before uploading them. Enter each leg to verify that the traverse closes within acceptable limits.

Coordinate Input Formats

All three modes support manual coordinate entry in the following formats:

The calculator auto-converts between all formats. Enter coordinates in whichever format is most convenient — you can enter Point A in MGA2020 and Point B in decimal degrees, and the calculator handles the conversion internally.

ℹ️ Did you know?

For MGA2020 coordinates, you must specify the zone. The zone selector remembers your last-used zone, or you can set a default zone in Coordinate Settings.

Map Preview

A Leaflet map sits below the calculation inputs and results. It provides a visual reference for your calculations:

• Markers show each entered or calculated point
• Lines connect the points (straight line for Point-to-Point, ray for Radial, path for Traverse)
• The map automatically zooms to fit all points

The map uses standard web map tiles (not the CesiumJS globe) so it loads quickly and works well for 2D coordinate preview.

Copying Results

Click Copy Results to copy the calculation output to your clipboard in a formatted text layout. The copied text includes:

• Input coordinates in all formats
• Calculated distances and bearings
• Output coordinates in all formats

This makes it easy to paste results into emails, reports, or other documents.

When to Use the Calculator

The calculator is designed for office-based work when you do not need the 3D map or site data:

• Checking coordinates received from a surveyor or contractor
• Calculating setout points from known reference marks
• Verifying traverse data before importing
• Quick distance checks between two known positions

For measurements that involve the site's DEM, survey data, or design surfaces, use the measurement tools on the 3D map instead.

What's Next?

• Measurement Register — browse and manage all measurements across sites
• CSV Import — import coordinate data from CSV files
• Coordinate Converter — convert single or batch coordinates between systems
• MGA2020 (Australia) — learn about the Australian grid coordinate system