RTK Receiver

Capturing Points

With an RTK receiver connected and corrections flowing, you can capture survey points directly on the CesiumJS map. Each captured point is saved as a measurement with full RTK metadata, making it suitable for as-built surveys and construction verification.

[Screenshot: CesiumJS map showing a live RTK position marker with an accuracy circle, a capture button in the toolbar, and several previously captured points marked with green pins]
Live RTK position on the map with accuracy circle and captured points.

Live Position Display

When an RTK receiver is connected, SiteView displays your current position on the CesiumJS map in real time:

  • Position marker — a crosshair or pin at your current geographic position, updating as the receiver reports new coordinates
  • Accuracy circle — a semi-transparent circle around the position marker, sized to represent the current horizontal accuracy estimate

The accuracy circle gives you an immediate visual sense of positioning quality. A small circle (a few centimetres) indicates a good RTK fix. A large circle (several metres) indicates an autonomous or float solution.

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ℹ️ Did you know?

The live position updates in real time as you move the receiver. This lets you navigate to specific locations on site while watching your position on the map — useful for finding survey marks, property boundaries, or design points.

Capturing a Point

To capture a point at your current RTK position:

  1. Position your receiver at the point you want to capture (hold the pole vertical and steady)
  2. Wait for the position to stabilise — watch the accuracy circle shrink to an acceptable size
  3. Click the Capture button in the SiteView toolbar

A capture dialog opens with the following fields:

Point Details

FieldRequiredDescription
LabelYesA name or identifier for the point (e.g., "BM-01", "Corner NE", "As-Built Kerb")
CodeNoA classification code (e.g., "BM" for benchmark, "IP" for iron pin, "TN" for top of nail)
CategoryNoA broader category for organising points (e.g., "Control", "As-Built", "Boundary")
NotesNoFree-text notes about the point

Fill in the details and click Save. The point is captured at the exact position reported by the receiver at the moment you clicked Capture.

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💡 Tip

Establish a consistent labelling convention before you start capturing. Using systematic labels like "CP-01", "CP-02" or "KERB-001", "KERB-002" makes it much easier to identify points later in the Measurement Register and in exports.

RTK Metadata

Each captured point stores comprehensive RTK metadata alongside the position:

MetadataDescription
Fix qualityThe GNSS fix type at capture time (Single, Float, or Fixed)
Horizontal accuracyEstimated horizontal accuracy in metres
Vertical accuracyEstimated vertical accuracy in metres (if available)
Satellite countNumber of satellites used in the position solution
HDOPHorizontal Dilution of Precision value
Age of correctionsTime since last RTCM correction was received (seconds)
ReceiverName/model of the connected receiver
Capture timestampExact date and time of capture

This metadata is valuable for quality assurance — it lets you verify that each point was captured under acceptable accuracy conditions.

Captured Points on the Map

Captured points appear on the CesiumJS map as pin markers. The pin colour reflects the fix quality at the time of capture:

  • Green pin — captured with a Fixed RTK solution (best accuracy)
  • Amber pin — captured with a Float solution (moderate accuracy)
  • Red pin — captured with a Single/autonomous solution (low accuracy)

Click any captured point on the map to see its label, coordinates, elevation, and RTK metadata in a popup.

Viewing Captured Points

Captured points appear in two places:

Site Measurements Tab

Points are listed in the Measurements tab of the site's floating panel, alongside all other measurements taken on the site. Filter by type to see only captured points.

Measurement Register

Points are also visible in the cross-site Measurement Register, where you can filter, sort, and export them alongside measurements from other sites.

Use Case: As-Built Surveys

RTK point capture is ideal for as-built surveys where you need to record the actual position of constructed features:

  1. Connect your RTK receiver and start NTRIP corrections
  2. Walk to each feature you need to survey (kerb lines, pipe inverts, slab corners, etc.)
  3. Capture a point at each location with a descriptive label and code
  4. Review the captured points on the map to ensure coverage
  5. Export the points as CSV or DXF for use in design software or project records
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⚠️ Watch out!

Always check the fix quality before capturing important points. A Fixed RTK solution provides centimetre accuracy, while a Float or Single solution may only be accurate to decimetres or metres. The capture dialog shows the current fix quality prominently — avoid capturing critical points when the fix is not Fixed.

What's Next?

Previous
NTRIP Corrections
Next
RTK Status & Accuracy