The fourth of a series of papers as part of a special issue of the Open Access Journal Future Internet on the theme “Internet and Landscapes“, as edited by the ISPRS Working II/6 on Geographical Visualization and Virtual Reality (Chris Pettit and Arzu Coltekin) has now been published by Haifeng Li and Bo Wu. This paper presents a service-orientated architecture for proactive geospatial information services (PGIS), which integrates the sensors, data, processing, and human services. The results show that the basic functions such as task analysis, managing sensors for data acquisition, service composition, service chain construction and execution are validated, and the important properties of PGIS, including interoperability, flexibility, and reusability, are achieved. . The full manuscript can be accessed via the journal through the following link: http://www.mdpi.com/1999-5903/3/4/298/