Dynamic GNN-based multimodal anomaly detection for spatial crowdsourcing drone services

We introduce a pioneering anomaly detection framework within spatial crowdsourcing Internet of Drone Things (IoDT), specifically designed to improve bushfire management in Australia's expanding urban areas. This framework innovatively combines Graph Neural Networks (GNN) and advanced data fusion techniques to enhance IoDT capabilities. Through spatial crowdsourcing, drones collectively gather diverse, real-time data across multiple locations, creating a rich dataset for analysis. This method integrates spatial, temporal, and various data modalities, facilitating early bushfire detection by identifying subtle environmental and operational changes. Utilizing a complex GNN architecture, our model effectively processes the intricacies of spatially crowdsourced data, significantly increasing anomaly detection accuracy. It incorporates modules for temporal pattern recognition and spatial analysis of environmental impacts, leveraging multimodal data to detect a wide range of anomalies, from temperature shifts to humidity variations. Our approach has been empirically validated, achieving an F1 score of 0.885, highlighting its superior anomaly detection performance. This integration of spatial crowdsourcing with IoDT not only establishes a new standard for environmental monitoring but also contributes significantly to disaster management and urban sustainability.