Geographic information based cartographic data three-dimensional display system

Abstract

The invention discloses a geographic information based cartographic data three-dimensional display system, and belongs to geographic information technologies. The system is characterized in that the system includes a cartographic data engine subsystem, a cartographic data scheduling subsystem, a cartographic data rendering subsystem and a cartographic data spatial query subsystem; the cartographicdata rendering subsystem obtains cartographic vector data and a symbolic style which are needed to be rendered through the cartographic data scheduling subsystem; the cartographic data scheduling subsystem uses multiple threads to obtain the data needed by the cartographic data rendering subsystem from the cartographic data engine subsystem to perform data operation; and the cartographic data spatial query subsystem performs a logical analysis of spatial geometric relations on the cartographic vector data through an organization structure of data and a created spatial index, and performs applying on the cartographic data according with the spatial geometric relations. The advantages of the system are that storage of tremendous amount of dwg data and GIS management can be realized, and theoriginal image display effect of the tremendous amount of dwg data in a three-dimensional system can be achieved; the fusion / merging display of tremendous amount of three-dimensional models and the tremendous amount of dwg data can be realized; and the dwg data can be taken as a whole feature class or a molecular feature class to perform display and applying.

Description

technical field [0001] The present invention relates to the technical field of geographic information, specifically realizing the display and application of dwg neutron elements as a single element class; the original display of massive dwg vector data; the GIS management of massive dwg data; the multi-source GIS data and A three-dimensional display system for cartographic data based on geographic information that seamlessly integrates dwg data. Background technique [0002] With the rapid development of IT technology and industry, geographic information system (GIS) has penetrated into all walks of life widely with its remarkable features and increasingly powerful functions, and is playing an increasingly important role in it. At the same time, these applications in turn put forward more and higher requirements for GIS. People live in a real three-dimensional space, and many practical phenomena cannot be solved well by relying on the existing 2D GIS, such as the design a...

AI Technical Summary

Problems solved by technology

[0004] The three-dimensional representation can give users more intuitive spatial elevation information, while the traditional two-dimensional representation reflects the plane position of spatial objects, and its elevation information only exists as an attribute value and cannot be reflected intuitively

[0007] However, there are some key technical problems in the current 3D GIS system, such as the 3D model focuses on browsing but lacks analysis functions, the fusion of multi-source data is not perfect, the display and use of dwg data is insufficient, and the organization and management of massive data, etc.

At present, there is no software that can quickly display massive dwg data as it is while displaying massive 3D models, seamless integration of multi-source dwg data, storage and GIS management of massive dwg data, spatial analysis and application of massive dwg data, etc. , realize the effective mining of dwg data information, improve the use efficiency and economic value of existing dwg data

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