Marking Ground Control Points (GCPs) and Recording Coordinates

Step 1: Setting Up the Base Station

• Identify the survey location on the map.
• Place the stake into the ground to mark the measurement point.
• Use spray paint to highlight the area around the stake.
• Place the base tripod over the stake.
• Mount the tribrach on the tripod.
• Align the instrument using the optical plummet.
• Place the GNSS Base Receiver on the tribrach.
• Power on the receiver and wait for initialization.

Step 2: Connecting Mobile to GNSS Base Receiver

• Turn on Wi-Fi on the mobile phone.
• Connect to the network "reach:37:2F".
• Open the Emlid Flow app.
• Rename device to "reach-base".
• Set update rate to 5 Hz under GNSS settings.
• Configure RTCM3 messages under Base Mode.
• Enable LoRa in Correction Output.
• Close the phone screen after setup.

Step 3: Setting Up the Rover (GCP 1)

• Place the GCP marker at the first location.
• Position the rover tripod over it.
• Mount the GNSS Rover Receiver.
• Power it on and wait for initialization.

Step 4: Recording Coordinates of GCP 1

• Connect mobile to rover Wi-Fi.
• Open Emlid Flow and configure GNSS settings.
• Enable LoRa in Correction Input.
• Check correction status under Status.
• Go to Survey → Add and label as "GCP".
• Enable Fix Only mode.
• Click Measure and wait for completion.
• Save and close after recording coordinates.
• Fold the tripod and store it.

Step 5: Recording Coordinates of GCP 2, 3, and 4

• Move to the next GCP location.
• Place the marker and set up the rover.
• Open Survey → Add → Measure.
• Wait for completion and save data.
• Store equipment after each measurement.
• Repeat for all remaining GCPs.

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Preparing the Drone for Survey

Steps

• Move to the drone take-off location.
• Open the drone box and remove components.
• Attach all four propellers.
• Insert the battery.
• Power on the drone and confirm readiness.

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Conducting the Survey - Ready to Fly

Steps

• Select a safe, flat take-off area.
• Place four safety cones around the area.
• Position the drone at the center.
• Power on the remote controller.
• Open Plan → 2D Photogrammetry.
• Define the survey boundary on the map.
• Save the plan as "DRONE JOB".
• Click Invoke → Start.
• Slide to Execute to launch the drone.
• The drone captures images automatically.
• After completion, it performs Return to Home (RTH) and lands.

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Post-Survey Data Collection, Analysis, and Reporting

Steps

• Power off the drone.
• Remove the memory card.
• Insert it into the laptop.
• Open Pix4Dmatic software.
• Import images from the Golf Part folder.
• Load gcps.csv under Tie Points.
• Set coordinate reference systems and apply.
• Open processing settings and enable:
  • Dense Point Cloud
  • Image Pre-processing
  • Mesh
  • DSM
  • Orthomosaic
• Start processing and wait for completion.
• View results in 3D mode.
• Import and save the Quality Report.
• Download the report (PDF) for submission.