Geomatics is a broad field that encompasses a wide range of technologies and techniques, including GIS, remote sensing, surveying, and cartography. It is applied to a variety of fields such as land use planning, natural resource management, environmental monitoring, transportation, and emergency response.
Geoinformatics is a field that combines elements of GIS, computer science, and statistics to create new ways of understanding and managing spatial data. It is focused on the use of information science and technology to acquire, process, analyze, and visualize geographic information.
In terms of academic ranking, it depends on the specific institution and program. Some institutions might have a specific program for geomatics or geoinformatics, some have a broader program that covers both fields and some other institutions have different levels of degrees for example a Bachelor’s or Master’s program for geomatics or geoinformatics. However, in general, both fields are considered important and have their own unique applications and areas of expertise.