Visual fusion system of multi-source three-dimensional city model

A city model, three-dimensional model technology, applied in special data processing applications, instruments, electrical digital data processing and other directions, can solve problems such as the inability to meet the precise volume of three-dimensional space, and achieve the effect of improving retrieval efficiency and reducing complexity

Inactive Publication Date: 2019-09-27
JIANGSU MARITIME INST +1
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Problems solved by technology

However, this method changes the boundary and position of the three-dimensional coordinates, so...

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  • Visual fusion system of multi-source three-dimensional city model
  • Visual fusion system of multi-source three-dimensional city model
  • Visual fusion system of multi-source three-dimensional city model

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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0042] see figure 1 , the present invention provides a technical solution: a visual fusion system of a multi-source 3D city model, including

[0043] The HBase distributed database is used to store standardized CityGML 3D city models, OSM data and Collada 3D building models for integration, storage and management. The storage method adopts base64 transcoding. CityGML 3D city models are based on An open source data model in XML format, including cityObjectMember el...

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Abstract

The invention discloses a visual fusion system of a multi-source three-dimensional city model, and belongs to the technical field of city digital systems. The visual fusion system includes an HBase Distributed Database, a processing unit, a fusion unit, a search/index unit, a web browser and a user side; a standardized CityGML three-dimensional city model, OSM data and a Collada three-dimensional building model are integrated, the HBase distributed database is used for performing storing and managing, a brand-new row key is designed, so that quick retrieval and indexing are facilitated; meanwhile, a MapReduce parallel computing framework and a Hadoop platform are utilized to realize a comprehensive simplification algorithm aiming at buildings in the city model; finally, the multi-source data are integrated and fused into a browser for visualization; experimental results show that the row key designed for HBase greatly improves the retrieval efficiency during retrieval, the proposed comprehensive simplification algorithm can effectively reduce the complexity of the three-dimensional city model, meanwhile, the visual effect of the three-dimensional city model cannot be excessively weakened, and the generated simplification model can be used for visual application of a user side.

Description

technical field [0001] The invention relates to the technical field of urban digitization systems, in particular to a visual fusion system of multi-source three-dimensional urban models. Background technique [0002] In human society, cities occupy an important position. The Central Urban Work Conference at the end of 2015 pointed out: "It is necessary to strengthen the construction and function integration of urban management digital platforms, build a comprehensive urban management database, and develop smart applications for people's livelihood services." As an important part of urban digital infrastructure, it has a wide range of applications, such as urban planning, environmental monitoring, and spatial information analysis. In these different application requirements, the 3D city model can be used as a base map to carry upper-level applications and display domain data, such as geographic information, road traffic, population distribution, air environment quality, etc....

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 李冰蟾毛波
Owner JIANGSU MARITIME INST
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