As a consortium member in the Geiser project, metaphacts focused on designing and implementing scalable backend services for the storage, retrieval, and processing of semantic geo data, by combining state-of-the-art semantic data management with Big Data technologies for scale-out and GPU acceleration. The technology was implemented in an operational planning use case where machine sensor data was integrated and correlated with technician operational schedules and spare parts management systems to improve maintenance operations, reduce wait times, and minimize downtimes.