Thurgau
Probabilistic road classification in historical maps using synthetic data and deep learning
Mühlematter, Dominik J., Schweizer, Sebastian, Jiao, Chenjing, Xia, Xue, Heitzler, Magnus, Hurni, Lorenz
Historical maps are invaluable for analyzing long-term changes in transportation and spatial development, offering a rich source of data for evolutionary studies. However, digitizing and classifying road networks from these maps is often expensive and time-consuming, limiting their widespread use. Recent advancements in deep learning have made automatic road extraction from historical maps feasible, yet these methods typically require large amounts of labeled training data. To address this challenge, we introduce a novel framework that integrates deep learning with geoinformation, computer-based painting, and image processing methodologies. This framework enables the extraction and classification of roads from historical maps using only road geometries without needing road class labels for training. The process begins with training of a binary segmentation model to extract road geometries, followed by morphological operations, skeletonization, vectorization, and filtering algorithms. Synthetic training data is then generated by a painting function that artificially re-paints road segments using predefined symbology for road classes. Using this synthetic data, a deep ensemble is trained to generate pixel-wise probabilities for road classes to mitigate distribution shift. These predictions are then discretized along the extracted road geometries. Subsequently, further processing is employed to classify entire roads, enabling the identification of potential changes in road classes and resulting in a labeled road class dataset. Our method achieved completeness and correctness scores of over 94% and 92%, respectively, for road class 2, the most prevalent class in the two Siegfried Map sheets from Switzerland used for testing. This research offers a powerful tool for urban planning and transportation decision-making by efficiently extracting and classifying roads from historical maps.
- Europe > Switzerland > Zürich > Zürich (0.14)
- North America > United States > California > San Francisco County > San Francisco (0.14)
- Oceania > New Zealand (0.04)
- (9 more...)
- Transportation > Infrastructure & Services (1.00)
- Transportation > Ground > Road (1.00)
Edge-based Parametric Digital Twins for Intelligent Building Indoor Climate Modeling
Ni, Zhongjun, Zhang, Chi, Karlsson, Magnus, Gong, Shaofang
Digital transformation in the built environment generates vast data for developing data-driven models to optimize building operations. This study presents an integrated solution utilizing edge computing, digital twins, and deep learning to enhance the understanding of climate in buildings. Parametric digital twins, created using an ontology, ensure consistent data representation across diverse service systems equipped by different buildings. Based on created digital twins and collected data, deep learning methods are employed to develop predictive models for identifying patterns in indoor climate and providing insights. Both the parametric digital twin and deep learning models are deployed on edge for low latency and privacy compliance. As a demonstration, a case study was conducted in a historic building in \"Osterg\"otland, Sweden, to compare the performance of five deep learning architectures. The results indicate that the time-series dense encoder model exhibited strong competitiveness in performing multi-horizon forecasts of indoor temperature and relative humidity with low computational costs.
- Europe > Sweden > Östergötland County > Linköping (0.05)
- North America > United States > New York (0.04)
- Asia > China > Guangdong Province > Shenzhen (0.04)
- (3 more...)
- Information Technology (1.00)
- Energy (1.00)
- Construction & Engineering (1.00)
CODET: A Benchmark for Contrastive Dialectal Evaluation of Machine Translation
Alam, Md Mahfuz Ibn, Ahmadi, Sina, Anastasopoulos, Antonios
Neural machine translation (NMT) systems exhibit limited robustness in handling source-side linguistic variations. Their performance tends to degrade when faced with even slight deviations in language usage, such as different domains or variations introduced by second-language speakers. It is intuitive to extend this observation to encompass dialectal variations as well, but the work allowing the community to evaluate MT systems on this dimension is limited. To alleviate this issue, we compile and release \dataset, a contrastive dialectal benchmark encompassing 882 different variations from nine different languages. We also quantitatively demonstrate the challenges large MT models face in effectively translating dialectal variants. We are releasing all code and data.
- Europe > Germany (0.14)
- North America > United States > Minnesota > Hennepin County > Minneapolis (0.14)
- Europe > Italy > Veneto (0.04)
- (67 more...)