Complete DGPS Survey Tutorial | Leica GS18 RTK | Full Setup & Practical Video of DGPS Surveying

Introduction

This tutorial provides a comprehensive guide on conducting a Differential Global Positioning System (DGPS) survey using the Leica GS18 RTK system. It covers the setup of base and rover stations, data collection, import/export of data, and practical tips to enhance your surveying efficiency. Whether you are a beginner or looking to refine your skills, this guide will help you navigate the complexities of DGPS surveying.

Step 1: Setting Up the Base and Rover Stations

1. Gather Equipment: Ensure you have the Leica GS18 RTK system, tripod, tribrach, RTK pole, and a controller.
2. Set Up the Base Station:
   • Center and level the tripod using the tribrach.
   • Securely attach the Leica GS18 unit to the tribrach.
3. Set Up the Rover Station:
   • Position the RTK pole at the desired location for data collection.
   • Attach the Leica GS18 unit to the RTK pole.
4. Power On:
   • Turn on both the base and rover units.
   • Connect the units to the controller one after the other.
5. Initialization: Wait for the base and rover to establish a connection and initialize before starting the survey.

Step 2: Collecting Topography Data

1. Select Survey Type: Choose the type of data you want to collect (e.g., road topography).
2. Data Collection:
   • Use the rover to navigate to specific points of interest.
   • Record the position of ground objects by pressing the record button on the controller.
   • Ensure you capture sufficient points to create a detailed topographical map.

Step 3: Importing Data and Stakeout

1. Create a New Project:
   • Open the software on your controller and create a new project.
2. Import Data Points:
   • Choose the import option and select your data file.
   • Set the coordinate system to UTM, specifying the correct zone (e.g., UTM 46 NORTH).
3. Stakeout Points:
   • Use the imported points to navigate to each location for precise measurements.
   • Follow the on-screen instructions to stake out each point.

Step 4: Modifying Data

1. Access Data Management:
   • Open the data management section on your controller.
2. Delete or Modify Points:
   • Select points that need modification or deletion.
   • Confirm your changes to ensure accuracy in your dataset.

Step 5: Automatic Data Recording

1. Enable Auto Mode:
   • Navigate to settings and select the option for automatic data recording.
   • This mode allows for continuous data collection without manual input.
2. Monitor Data Collection:
   • Ensure the system is actively recording data as you move through the survey area.

Step 6: Closing the Survey

1. Finalize Data Collection:
   • Review all collected data to ensure completeness.
   • Save the project to avoid data loss.
2. Power Down:
   • Turn off both the base and rover units.
   • Disconnect them from the controller.

Step 7: Exporting Data

1. Select Export Option:
   • Open the export menu in your project settings.
2. Choose Format:
   • Select the desired format for data export (CSV, DWG, ASCII, or DXF).
3. Export Data:
   • Follow the prompts to complete the export process and save the files to your device.

Conclusion

By following these steps, you can effectively conduct a DGPS survey using the Leica GS18 RTK system. From setting up the equipment to collecting and exporting data, each phase is crucial for accurate surveying. Make sure to practice these techniques in various environments to enhance your skills and efficiency. For further learning, consider exploring additional resources or videos related to DGPS surveying.