31 results about "Spatial information systems" patented technology

The present invention relates to the technical field of geospatial information systems and discloses a method for converting a BIM entity model into a multiple levels of details (LOD) GIS standardized model. Through a method of converting the BIM entity model into the multiple levels of details (LOD) GIS standardized model, the automatic conversion from the BIM entity model to the multiple levels of details (LOD) GIS standardized model is realized, a computer can conveniently execute the geometric semantic information interoperability between two models, the complete conversion and mapping between an IFC format and a CityGML format is realized, and the conversion quality is improved. In addition, the conversion method has the advantages of fast conversion speed and high conversion accuracy, and the practical promotion and application are facilitated.

The invention relates to a parking space information system, comprising: at least one sensor, which is designed to acquire vehicle data of a vehicle in a parking space; and an evaluation device, which is used to receive the collected vehicle data and is used to determine the driving type of the vehicle according to the collected vehicle data, and is used to output the determined driving type.

The invention provides a flexible node model of a space information network. The flexible node model of the space information network aims to provide a flexible node model that has strong expansibility, can enhance the service ability of the space system, can reduce the construction cost of the spatial information system, and has a multi-dimensional elastic node model. The invention is realized by the following technical scheme: in the model node, the functional service module is divided into a software service sub module and a hardware service sub module including a software algorithm library; the network system module adopts the physical layer, data link layer, network layer, transport layer and application layer which are five ISO protocol network configuration layers corresponding to the space physical platform, so as to use as a parent model of the virtual composition and virtual function; all nodes in the space network realizes different platforms from the spatial information network backbone nodes, indirect access nodes, direct access nodes and functional subnet nodes derived by the parent model through functional interfaces. The lexible node model of the space information network enhances the service ability of the space system through the function decoupling spatial physical platform.

The present invention provides a space information system based on the SpaceVPX standard, comprising: an information plane, a system management module, a main control module, a switching module, and a functional module connected by mutual communication, wherein: the information plane is used for according to the internal modules of the system The data transmission rate between provides different data exchange topological networks; the system management module is used to provide the management strategy of each module in the system and the communication protocol between the modules; the main control module is used to limit and Each module is controlled to perform a corresponding task; the switching module is used to define the interaction relationship between each module; the function module is used to define the function that each module is responsible for. Therefore, a space information system for the SpaceVPX standard can be constructed, making the whole system more standardized and more applicable.

The invention relates to the technical field of geographic space information systems, and provides a city three-dimensional model data organization method. The method comprises the steps of conducting multi-detail and multi-level simplifying pre-process to city three-dimensional model data, establishing a multi-level three-dimensional scene organization structure for a large number of scenes within the range of a whole city, conducting serialization and reestablishment to the three-dimensional model data of network transmission, and conducting dynamic scheduling to the city three-dimensional model data based on visibility computing and level of detail (LOD) computing. Through the establishment of a space index structure of a large number of city three-dimensional model data and automatic multi-detail and multi-level simplification of the city three-dimensional model data, organization optimization is conducted to the three-dimensional model data under the network environment, dynamic scheduling efficiency of the city three-dimensional model data under the network environment is improved, and real-time visual efficiency of the city three-dimensional model data is improved.

The invention discloses a whole space information expression method and a whole space information system. The method includes following steps: statically describing whole space information which includes position coordinates (x, y, z) and natural attributed information of a space entity in physical world and network virtual world; adding time attribute, and adding a time identity for the space entity in a static state to realize dynamic description of the whole space information; providing place name address identity and address grid coding identity under uniform time-space standards to realize correlation and integration of different space entities based on geographic space position or range. The system comprises a space entity description module, a time identity module and a place name address description module. The whole space information expression method is used for realizing dynamic description and combining communication of all space entities having position information in the virtual world and realizing whole space information expression of geographic position, natural attribute and time-space attribute of the space entities and thematic data under the uniform time-space standards.

The invention relates to the technical field of a geospatial information system, and provides a three-dimensional space data parallel scheduling method based on data content. The method comprises the steps of receiving three-dimensional space data scheduling requests of a plurality of clients; resolving a three-dimensional space data scheduling task through a scheduling task parallel resolving method based on the data content, generating a three-dimensional space data scheduling sub-task which can be executed in parallel; distributing a usable task executing thread and a database connection for the three-dimensional space data scheduling sub-task, carrying out parallel inquiry of the three-dimensional space database; recombining the obtained data inquired by the three-dimensional space data scheduling sub-task and then returning to the clients. The efficiency of scheduling different types of three-dimensional space data from the three-dimensional space database is improved, and the real-time visualization ability of a three-dimensional geographic information system (GIS) is also improved by resolving and parallel executing of the three-dimensional space data scheduling task.

The invention discloses a linear element spatial index construction method, system and retrieval method and system thereof, and relates to the technical field of spatial information systems. The construction method includes: calculating each endpoint B according to the coordinate length of the linear element n The distance to the starting point A, judge whether the calculated distance from each end point to the starting point is less than or equal to the standard length, if so, construct a rectangle with the line connecting the starting point to the end point as the diagonal line, and construct R using each constructed rectangle tree space index. The invention also discloses an R-tree-based linear element space index construction system, a retrieval method and a retrieval system. The technical scheme disclosed by the invention realizes that for long linear elements, the area of ​​the circumscribed rectangle is reduced, the amount of returned data and invalid operations are reduced, and the query efficiency and accuracy are improved.