Data supporting the publication: LDPoly: Latent Diffusion for Polygonal Road Outline Extraction in Large-Scale Topographic Mapping
The LDPoly Dutch Polygonal Road Outline Extraction Benchmark is a processed dataset for extracting vectorized road-surface polygons from high-resolution aerial imagery. It was used in the paper LDPoly: Latent Diffusion for Polygonal Road Outline Extraction in Large-Scale Topographic Mapping.The dataset contains RGB aerial imagery and corresponding road polygon annotations from Deventer, Enschede, and Giethoorn in the Netherlands. Deventer is used for training and in-region testing, while Enschede and Giethoorn serve as unseen cross-region test areas covering urban, suburban, rural, and forested environments.The original 4,000 × 4,000 images at 7.5 cm spatial resolution were downsampled and divided into non-overlapping 256 × 256 patches for model development and evaluation. The dataset supports polygonal road outline extraction, road segmentation, and cross-region generalization studies. Detailed file organization, annotation specifications, and preprocessing information are provided in the accompanying README.The dataset is derived from the Map2ImLas dataset through further processing and reorganization of the source data.