RTK Capture

When a Bluetooth RTK receiver is connected, the SiteView mobile app uses its high-accuracy position for all point capture. Fix quality is displayed in real time, captured points carry RTK metadata, and accuracy badges let you distinguish survey-grade measurements from phone GPS observations at a glance.

RTK Position on the Map

With an RTK receiver connected and receiving corrections, your position on the map reflects the receiver's high-accuracy coordinates rather than the phone's built-in GPS. The differences are immediately visible:

• The accuracy circle shrinks dramatically — from several metres (phone GPS) to centimetres (RTK fixed)
• The position updates are smoother and more stable
• The altitude reading is more reliable, as RTK provides precise ellipsoidal heights

Your position marker on the map tracks the RTK receiver's output in real time. As you walk around the site with the receiver, the marker follows accurately.

Fix Quality Display

The app displays the current RTK fix quality using a colour-coded indicator:

The fix quality indicator is always visible when an RTK receiver is connected, giving you constant awareness of your positioning accuracy.

💡 Tip

Wait for a Fixed solution (green) before capturing survey-grade points. A Float solution is useful for approximate positioning, but only a Fixed solution provides the centimetre-level accuracy needed for construction surveying.

Capturing RTK Points

The capture workflow is the same as standard point capture, but with RTK-enhanced precision:

1. Enter Capture Mode on the site detail map
2. Verify the fix quality indicator shows Fixed (green)
3. Position yourself at the point you want to capture
4. Tap Lock Position to freeze the coordinates
5. Add a label, code, and notes
6. Tap Save

The captured point is stored with the RTK coordinates and fix quality metadata.

Accuracy Badges

Every captured point carries an accuracy badge that reflects the fix quality at the moment it was captured. These badges are visible throughout the app:

• On the map markers — so you can visually distinguish high-accuracy points from phone GPS observations
• In the measurement list — alongside each point's details
• In the point detail view — with the full accuracy reading and fix type

This means you can always tell at a glance which points were captured with survey-grade accuracy and which were approximate phone GPS readings.

ℹ️ Did you know?

The accuracy badge is set at the moment you tap Lock Position. If your fix quality changes after locking (for example, if the receiver loses corrections while you are adding the label and notes), the badge still reflects the quality at the time the position was locked.

RTK Metadata

Each point captured with an RTK receiver stores additional metadata beyond standard GPS coordinates:

This metadata is synced to the SiteView web app along with the point coordinates. It provides a full audit trail of positioning quality for each measurement — important for construction surveys where accuracy documentation may be required.

When to Use RTK vs Phone GPS

The choice between RTK and phone GPS depends on your task:

Use RTK For

• Setting out — placing or checking survey peg positions
• As-built surveys — recording the final positions of constructed elements
• Boundary checks — verifying distances to site boundaries
• Grade checks — recording spot elevations on finished surfaces
• Any task requiring sub-metre accuracy

Phone GPS Is Sufficient For

• General site documentation — marking where a photo was taken or a defect observed
• Navigation — finding your way to a specific area of a large site
• Approximate locations — recording which building or zone a report relates to
• Quick reference — capturing a point when you do not have your RTK receiver to hand

⚠️ Watch out!

Do not rely on phone GPS for any measurement that will be used for construction setting out, quantity calculations, or contractual compliance. Phone GPS accuracy of 3-10 metres is not sufficient for these purposes. Always use an RTK receiver for survey-grade work.

Reviewing RTK Points

After capturing RTK points, review them on the site detail map. Points with a Fixed accuracy badge are displayed with a distinct marker style, making it easy to see your survey-grade observations against the site background.

Tap any point marker to view its full details, including coordinates, accuracy, fix quality, satellite count, and your notes. This information syncs to the web app and is available for review, export, and further analysis.

What's Next?

• Distance Measurement — measure distances between captured RTK points for precise results
• RTK Bluetooth Setup — configure your RTK receiver and NTRIP corrections
• Point Capture — general point capture workflow and GPS accuracy