Geomatics is a science-based, engineering discipline that includes:

• Land surveying using global positioning systems and conventional techniques
• Automated mapping
• Computational analysis and adjustment
• Geodesy and Map Projections - http://oceanservice.noaa.gov/education/kits/geodesy/welcome.html
• Principles of boundary law
• Geographic Information Systems (GIS) - http://www.gis.com/content/what-gi
• Digital photogrammetry - http://www.wisegeek.com/what-is-digital-photogrammetry.htm
• Remote sensing and image analysis - http://ww2010.atmos.uiuc.edu/%28Gh%29/guides/rs/home.rxml
• Hydrography - http://www.redensigngroup.org/mcga07-home/shipsandcargoes/mcga-shipsregsandguidance/mcga-dqs-hmp-hydrography.htm

The wide diversity in the profession creates a similar diversity of employment opportunities.  A graduate in Geomatics can find employment as a surveyor, analyst or business owner in environmental sciences and in the transportation or forensics industry to name a few.  For further exploration of job possibilities, please follow the links below. 
http://surveyingcareer.com/careers/career_index.html  also, for occupational descriptions see

What is happening in Geomatics throughout the World:

12 Job Certifications and Licenses you will need to be Green

Geomatics: Who Needs it? Cultural Survival

Application of Geomatics in Humanitarian Emergencies

Injury prevention