| With the gradual development of informationization and intelligence,the dependence of human daily activities on cyberspace is increasing,and cyberspace has become the basic guarantee of national political,economic and social existence and development,and the fifth strategic space alongside "land,sea,air and sky".All corners of the world are experiencing cyber offensive and defensive events all the time,and timely and comprehensive situational awareness of cyberspace is an important means to maintain national cyber security.Situational expression and visual analysis is one of the key technologies of situational awareness.Using cyberspace mapping technology to measure cyberspace,map cyberspace to geographic space,and express multi-domain fused spatial situational information under a unified spatio-temporal reference framework is the current development trend of cyberspace situational expression.This paper takes cyberspace potential target power information system as an example,explores the coupling mechanism between cyberspace and geospatial,and conducts in-depth research on the spatio-temporal data modeling and visualization analysis technology of cyberspace entity targets.The main work and innovation points of the paper are as follows:1.The meaning of cyberspace mapping and cyberspace situational awareness is sorted out.The definition and characteristics of cyberspace entities are given according to the definition and multi-level characteristics of cyberspace;the modeling theory of cyberspace entities is summarized;and the visualization methods of cyberspace entities are summarized from three perspectives of "multi-grained spatio-temporal data model,multi-level cyberspace,and cyberspace scenario".2.In view of the imperfect research on the modeling of cyberspace entities and the difficulty of describing the cross-domain behavior of cyberspace entities and the difficulty of reflecting the relationship between cyberspace and geospatial association,this paper reconstructs a coupled geographic network entity model on the basis of the multi-grained spatio-temporal object model.This model fully considers the multi-level nature of cyberspace entities and highlights their cognitive and behavioral capabilities and cross-domain influence,which can not only describe the multi-grained attributes of cyberspace entities,but also directly describe the dynamic evolution process of entities in network events according to the logical association of the geographic network,and then reflect the cross-domain coupling of the geographic network.3.According to the ground network coupling entity model,the visualization method system of "event-module decomposition-content determination-spatial mapping-expression"is constructed for the cyberspace events.Taking the electric power information system as an example,the visualization task is decomposed in two aspects,namely,attribute description and network event simulation,respectively.In terms of network event simulation,the whole system is divided into attribute view and statistical view to provide an effective paradigm for network event situational awareness.4.In response to the current demand of cyberspace situation expression,a prototype system of power information system situation expression visualization based on Cesium with B/S architecture was developed independently by adopting the popular 3D WebGIS approach.Firstly,we analyzed the system requirements in terms of overall system requirements and system functions;secondly,we introduced the overall system architecture and system hardware and software facilities,and categorized and displayed several functions of the system.The system satisfies the needs of combined cyberspace and geospatial expression,and can perform attribute analysis as well as situational awareness tasks for power information systems in a comprehensive and unified manner from multiple perspectives,which provides a technical guarantee for securing cyberspace. |
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