Urban Low-Altitude Airspace Suitability for UAV Operations: A Multi-Source Geospatial Assessment and Spatial Heterogeneity Analysis
City-scale UAV planning requires a clear distinction between areas screened out by operational constraints and areas retained for graded suitability assessment. To address this need, this study develops a grid-based framework for near-ground airspace up to 120 m above ground level in Yangzhou, China, and examines the r...