Global gravity field models and their use in Earth system research -- Enhanced TEC Maps Based on Different Space-Geodetic Observations -- EnMAP Ground Segment Design: An Overview and Its Hyperspectral Image Processing Chain -- Robust Phase-Correlation based Registration of Airborne Videos using Motion Estimation -- Ozone seasonal variation with ground-based and satellite equipments at Évora Observatory - Portugal during 2007-2010 -- Detecting and Characterizing Settlement Changes in developing countries using VHSR data - case of the Coastal Area of Benin -- Multispectral remote sensing of invasive aquatic plants using RapidEye. This book provides a collection of selected articles that have been submitted to the Earth Observation and Global Changes (EOGC2011) Conference. All articles have been carefully reviewed by an international board of top-level experts. The book covers a wide variety of topics including Physical Geodesy, Photogrammetry & Remote Sensing, High-Resolution and Fast-Revisiting Remote Sensing Satellite Systems, Global Change & Change Detection, Spatial Modelling, GIS & Geovisualization. The articles document concrete results of current studies related to Earth Sciences. The book is intended for researchers and experts working in the area of Spatial Data Analysis, Environmental Monitoring/Analysis, Global Change Monitoring and related fields.