PhenoStras2022: an urban tree phenology dataset

The PhenoStras2022 dataset was collected throughout the year 2022 across 40 green sites located within the urban area of Strasbourg (France) using a smartphone camera (Samsung SM-A528B/DS – 64 MP). Two types of photographic acquisitions were performed: Digital Hemispherical Photographs (DHP), captured using a removable 180° fisheye lens, and Front-View Photographs (FVP), taken with the smartphone's standard sensor. These image-based observations were complemented by site-level phenological monitoring using a simplified BBCH scale, providing field-based annotations of key developmental stages of urban trees across the whole season.