1. The application of structure from motion to identify the geological structures and outcrop studies
Aditya Saputra, Trias Rahardianto, Christopher Gomez
Dept. of Geography, University of Canterbury, New Zealand

2. Introduction
The outcrop studies have played an important role for geological analysis in various of purposes
Regional geologist conducts the outcrop study to study the outcrop pattern and seismic characteristics.
The recent development of technology and computer allows them to produce 3D visual of outcrops
However, the usage of Light Detection and Ranging Survey (LiDAR), Airborne Laser Scanning (ALS), Terrestrial Laser Scanning (TLS) and Unmanned Aerial Vehicle (UAV) surveying are very expensive.

3. Photogrammetry for outcrop studies
Able to capture the large amount of the outcrops information
Effective for wide areas
Suitable for dangerous and remote site study
But, it has coarse spatial resolution and
not suitable for particular outcrop, for
example cliff or near vertical outcrop

4. Structure from Motion (SfM)
Derived from the photogrammetry technique
Relatively new for geoscience implementation
Effective for small to moderate outcrops
Provides high resolution of a 3D outcrop model
Low cost-alternative method to visualize the outcrop
Objective
Identify the fault evidence and capture the outcrop characteristic using SfM technique
To find out the SfM accuracy

5. Location

6. Seismic activity Seismicity Java Sea Deep earthquake >250 km
Middle earthquake km
Shallow earthquake
< 60 km
Indian Ocean

7. Geology

9. Method

11. result

13. Example of 3D surface outcrop location 17 Segment 3 (run by using Agisoft Photoscanpro)

16. Conclusion Acknowledgement
The implement of SfM is highly recommended on the poor data area
SfM can Clearly identified the fault and provides high accuracy of 3D surface model of the outcrop (30 fault evidences with RMS only 0.25 cm)
Acknowledgement
The authors thankful to main supervisor, Dr. Christopher Gomez, who has supported this project, also Dr. Danang Sri Hadmoko and Prof. Dr. Junun Sartohadi as well. we also acknowledge The Indonesia Endowment Fund for Education for financial support, as well as the University of Canterbury New Zealand who provided adequate reference for this project.

17. Thank you