To extract craters with a radius greater than 10 km more effectively from lunar digital elevation maps, pyramidal image segmentation based on the U-Net model is proposed, and the conversion relat ... Read More

Autonomous driving technology is significantly based on the fusion of high-definition (HD) maps and sensors. Therefore, the construction and update of HD maps must be emphasized to achieve full d ... Read More

The demand for 3D spatial data and effective dataset construction has been increasing. However, the construction of 3D spatial datasets is more time-consuming and costlier than that of 2D spatial ... Read More

The rendering of urban 3D scenes involves a large number of models, where the computer performance becomes a limitation. Arbitrarily putting all the models in a folder for storage significantly r ... Read More

In this paper, we propose a method of effectively visualizing particulate matter data based on a 3D spatial grid system to overcome the limitations of 2D spatial information. The metropolitan are ... Read More

Toward solving the problems of low data scheduling efficiency and relative delay in rendering when constructing complex urban three-dimensional (3D) scenes, we propose a visual-perception-driven ... Read More

In this study, we establish a 3D data model of underground utilities that applies international spatial information standards correspondingly, and we design a data model on the basis of this mode ... Read More

In this study, we propose an indoor visual positioning method based on image features. RGB-D camera data are used to establish an image database used for positioning. The 3D coordinates of pixels ... Read More

In this study, we propose a relative and clustering analysis correction (RCC) technique capable of improving the location accuracy of a smartphone global navigation satellite system (GNSS). The R ... Read More

In this study, gridded gravity data (GGD) were generated by using the correlation between gravity and the height extracted from a high-resolution digital elevation model (DEM) in an area where th ... Read More

In this study, the smartphone global navigation satellite system (GNSS) positioning accuracy was improved by selecting optimal visible satellites through a 3D surface model and the shadow matchin ... Read More

The size of the global construction market is expected to increase to about $14 trillion by 2025, with fierce competition expected in emerging markets. However, construction is the only industria ... Read More

A method that can measure the road density in the field is very effective in managing and maintaining road quality. However, the conventional density measurement method has a disadvantage that it ... Read More

Early-age concrete shrinkage induces stress, which affects the cost and service life of concrete pavements. Concrete construction quality assurance has been evaluated as an experiment test, but i ... Read More