Spatio-temporal data model based on 3DPS

Abstract

The invention discloses a spatio-temporal data model based on 3DPS, the model comprises a Data framework and a Model framework, a description scheme is designed for spatio-temporal dynamic features of geographic objects on a data level, a description rule of a dynamic scene is constructed to accurately describe dynamic changes of the geographic objects, a description document is subjected to subpackage design, a streaming transmission mechanism is constructed. A simple interaction strategy, a complex interaction strategy and a cooperative interaction strategy are designed on a model level; attributes of the spatial-temporal dynamic feature design description scheme comprise document attributes and geographic object attributes; a dynamic feature description scheme oriented to geographic spatio-temporal objects is designed, the dynamic change condition of the geographic objects in a geographic scene can be accurately described, a data subpackage and streaming transmission mechanism is adopted, the problem that network transmission is limited by analysis and rendering of a client due to the fact that the description scheme is too large is effectively solved, and a spatio-temporal data model interaction strategy is constructed; the interactive strategy of the user and the model service under various conditions can be met, and the dynamic simulation and analysis capability of the geographic scene is improved.

Description

technical field [0001] The invention relates to the technical field of spatio-temporal data models, in particular to a 3DPS-based spatio-temporal data model. Background technique [0002] Spatio-temporal data model is the key content of constructing temporal GIS, and plays a vital role in GIS dynamic visualization and simulation analysis. With the rapid development of computer network technology, geographic information technology is developing in the direction of service and intelligence. Sharing the spatio-temporal data model through service can effectively make the model reuse, promote the interdisciplinary integration of the model, give full play to the potential value of the model itself, promote the in-depth study of the spatio-temporal data model, and enhance the comprehensive simulation analysis ability of GIS. [0003] At present, scholars at home and abroad have studied a large number of spatiotemporal data models, and related scholars have conducted in-depth resea...

AI Technical Summary

Problems solved by technology

[0007] In order to achieve the above object, the present invention provides the following technical solutions: a 3DPS-based spatio-temporal data model, the model includes a Data framework and a Model framework, design a description scheme for the spatiotemporal dynamic characteristics of geographical objects at the data level, and construct description rules for dynamic scenes In order to accurately describe the dynamic changes of geographic objects, and with the passage of time and the complexity of the changes, the volume of the description document will gradually increase. The subcontract design and construction of the streaming transmission mechanism for the description document can effectively solve the problem of data In order to meet the practical application of interaction strategies, it expands on the basis of the OGC 3DPS standard. Added Model module, designed 2 methods and 6 implementation methods to meet the interaction needs of users and model services; the attributes of the spatio-temporal dynamic feature design description scheme include document attributes and geographic object attributes

Images