This Unit orients trainees about the process of extracting data from a three-dimensional (3D) model by using digital photography and preparing that data for import into a Geographic Information System (GIS) environment by georeferencing.
Data on a 3D model can be captured and transferred to a GIS. While transferring the data from one medium to the other, it is important to minimise data loss or erroneous georeferencing. Those who extract the data should be fully familiar with the attributes described in the map legend (i.e. the scale, symbols and associated descriptions).
Unit objectives / expected outcomes
After the completion of the Unit the trainee will be able to:
- describe how to extract data from a 3D model using digital photography;
- describe how to georeference photographs.
Content outline, main topics covered and suggested sequencing
This Unit focuses on the topics listed below:
- Data capture via digital photography (PPT No. 1 including Q&A opportunities) (40 min)
- Georeferencing of photographs (PPT No. 2; including Q&A opportunities) (50 min); followed by (Q&A session) (10 min)
Components of the Unit
Handouts for Trainee (to be distributed in printed format):
- Capturing Data from a 3D Model and Georeferencing Them (Handout4T)
- List of Additional Resources
- Unit Glossary
Handouts for Trainee (to be distributed in digital format)
- PPT No. 1: Data Capture Using Digital Photography; presentation about the process of extracting data from a three-dimensional model by using digital photography (20 min)
- PPT No. 2: Georeferencing for Digitising; presentation about the process of preparing data for import into a Geographic Information System environment by georeferencing (30 min)
1 hr and 30 min
Additional trainer resources
- T. Sutton, O. Dassau, M. Sutton. 2009. A Gentle GIS Introduction – Quantum GIS
- WHO. Tutorial on Geometric Correction.
Computer and beamer