This document outlines a presentation on drone surveys. It introduces different types of surveying techniques, including traditional surveying and aerial surveying using drones. It discusses the components and sensors of drones, as well as their applications. The document outlines the advantages of drones for quick, low-cost surveying but also notes disadvantages like regulations and limited battery life. It describes the process of field data collection, image processing, and accuracy assessment when using drones for surveying projects. Finally, it provides examples of drone survey projects in Nepal.

1. Drone Survey
Upendra Oli

2. Presentation Outline
 Introduction
 Application of drones
 Advantages and disadvantages
 Field Data Collection
 Image processing and Outputs
 Accuracy Assessment
 Some Projects

3. Introduction
Surveying Techniques
➢ Traditional Surveying
➢ Ground Survey: Compass, Tape, Chain, Theodolite
➢ Aerial Survey: Aeroplane based Survey
➢ Modern Surveying
➢ Ground Survey: Total Station, EDM, DGPS
➢ Aerial Survey: Drone Based Survey

4. Introduction
UAV Photogrammetry
 A low cost photogrammetric platform
 Remotely or (semi) autonomously controlled without human pilot
 Low flying height-Able to capture high resolution datasets
 Less stable platform

5. Introduction
Drone/UAV
What people thought in early days What it actually is

6. Introduction
Types of drone
Fixed Wing Drones Rotary Wing/ Multicopter Drones

7. Introduction
Major components of drone
Wing Sensor GPS

8. Introduction
Major Sensor Types
Optical
Multispectral
LIDAR
Thermal

9. Applications of UAV
Surveying & Mapping Agriculture Search & Rescue
Surveillance Research Cargo Delivery And many more….

10. Advantages and Disadvantages
Why Drones??
High resolution Imageries
Quickly deployable
Low cost Solution
Easy to operate
Remote Access
Automated/ manual flights Drone Image ,Bhimtar Satellite Image

11. Advantages and Disadvantages
Disadvantages/Limitations
 Government Rules and Regulations
 Security Issues if wrongly used
 Vulnerable to bad weather and
Damage
 Limited battery life
 Less accuracy on highly dense
forests while using optical cameras
Drone Image ,Bhimtar Satellite Image

12. Field Data Collection
Planning
 Preliminary Flight Planning
 Flying height
 Overlap between images
 Ground Control Points
 Resolution

13. Field Data Collection
Recee and Monumentation
 Benchmarks setup
 Red flag with white cross
for drone image processing
to identify the BM
 Preparation of D-Cards

14. Field Data Collection
DGPS Survey
 Get accurate coordinates
of the Benchmarks
DGPS Survey

15. Field Data Collection
Flight planning and Drone Flight
 Revise flight plan as per the site condition
 Fly the drone as per the plan covering
the whole area

16. Image Processing and Outputs
Flight PathsSparse Point Clouds
Dense Point Clouds

17. Image Processing and Outputs

18. Image processing and Outputs
Cadastral Overlay
 Overlay cadastral data over
Topographic Map, Orthophoto

19. Image processing and Outputs
Cut Fill Volume Calculation
 Calculate Cut/Fill Volumes

20. Accuracy Assessment
 GCP Types
 3D GCP’S
 Check Points

21. Some Projects
Mapping Bagmati Corridor

22. Some Projects
Survey for the construction of Park
Drone Survey at
Nawalparasi for
the construction
of Park

23. Some Projects
Earthquake Reconstruction Mapping at Bhimtar
Mapping Reconstruction
Activities to check the progress
of the reconstruction

24. Some Projects
Feasibility Survey
Feasibility Survey of Liping
Hydropower

25. Some Projects
Landfill Site Mapping
Mapping proposed landfill site at
Bancharedanda and
Samyakholcha

26. Thank You!!!