Introduction To GEOBIA
Objectives and outcomes
The general aim of this short course is to build on the Introduction to Earth Observation course by exposing students to the advanced techniques in image analysis, focussing primarily on Geographic Object-Based Image Analysis (GEOBIA).
The expected outcomes are:
- Understand and explain the need for pre-processing satellite imagery;
- Understand and explain the principles of supervised, unsupervised and expert system (rule-based) classification approaches;
- Describe frequently used image classification algorithms;
- Understand and explain the need for and application of image transformations;
- Understand the principals of accuracy assessment and sound field work;
- Describe the fundamentals of geographical object-based image analysis (GEOBIA);
- Understand object creation and describe a range of image segmentation algorithms;
- Describe various image object features, including spectral, textural, geometrical, contextual and relational features.
- Implement a simple image processing workflow in an object-based environment;
- Select, apply and assess various image transformations within an object-based environment;
- Perform a simple accuracy assessment of a object-based classification product;
- Integrate an earth observation product into a GIS application.
The course duration is three weeks and includes a 5-day period during which students attend contact sessions (i.e. lectures and practical exercises) and write tests. Contact sessions run from 9h00-17h00 daily from Monday to Thursday. An exam (for those who register for the full course) is taken on the afternoon of day 5 (Friday). Assignments are completed in the student’s own time (during the two weeks following the contact period) and are submitted electronically.
Students need not be on campus during the assessment period, but need access to a computer loaded with eCognition Developer 8 and ArcGIS 10 software. An eCognition temporary licence (valid for one month) can be supplied if necessary. A Student Edition of ArcMap (valid for one year) can be supplied at an additional cost (please contact the short course manager for availability and costing).
Students who are not interested in being assessed may choose to register for the first 4 days only (i.e. only attend the lectures and exercises and not write the exam or complete any assignments). Students choosing this option will receive a certificate of attendance.
This course is accredited by Stellenbosch University, an accredited higher education provider. The content of the course is identical to a component of the three-year BSc GeoInformatics programme that is accredited by the South African Geomatics Council (SAGC). Upon successful completion of both the contact and assessment components, an official Stellenbosch University certificate of competence will be awarded.