The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Obtaining accurate information on rock mass discontinuities for deformation analysis and the evaluation of rock mass stability is important. Obtaining measurements for high and steep zones with the traditional compass method is difficult. Photogrammetry, three-dimensional (3D) laser scanning and other remote sensing methods have gradually become mainstream methods. In this study, a method that is...
For the mine roadway surface reconstruction based on laser scanning point cloud, the cylinder projection method and Poisson reconstruction method were adopted to build the roadway model in this paper. The two methods were introduced in detail including the three modeling parts of the cylinder projection method and the five parts of the Poisson equation reconstruction method. On this basis, two methods...
In most spatial information systems, 3D topographic objects and geological strata are often represented as geometrically isolated models due to different data sources and different data models. Though current 3D representations can give satisfactory performances for visualization, the unlinked representations of spatial objects can hardly support real 3D spatial analysis, for instance the integrated...
Spatial index is the foundation of spatial database, while efficiency improvement of traditional serial spatial index has nearly reached its limit, it is therefore necessary to develop parallel spatial index approaches to break the bottleneck in accessing the root node in serial mode. This paper proposes a parallel spatial index called Hilbert R tree index, which can be carried on multicore CPU and...
Geological Section (GS) map is a kind of fundamental material for studying geological stratum, rock mass and geological structures, which can provide the basic information for geological staff to recognize and analyze geological phenomenon. However, it's not so easy to automatically generate 3D geological sections for complex geological stratum, especially geological sections with stratal pinch-out...
With the rapid development of computer technology and spatial information theory, 3D geological modeling and visualization has become a hot spot in geosciences research such as mathematics geology, geotechnical engineering and so on. In recent years, several kinds of modeling methods have been developed for 3D modeling of simple geological structures. However, for complex geological structures, such...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.