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Mass three-dimensional digital city model organization and management method

A three-dimensional digital and city model technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problem that the original data cannot ensure data consistency in later data, achieve fast loading efficiency, ensure consistency, and avoid inconsistency Effect

Inactive Publication Date: 2017-05-17
星际空间(天津)科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] ③The traditional quadtree decomposes the quadtree based on the spatial range of the target area. This form cannot ensure the consistency of the data for the organization of the original data and the update of the later data.

Method used

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  • Mass three-dimensional digital city model organization and management method

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Embodiment 1

[0036] figure 1 A schematic flow diagram of a method for organizing and managing a massive 3D digital city model provided in this embodiment, as shown in figure 1 As shown, the method follows the steps:

[0037] Framing: According to the fragmentation range of large-scale topographic maps of the city, the original data is produced, updated and archived with the map as a unit;

[0038] Data block division: divide the city range into data blocks, and make all data block files smaller than a certain threshold;

[0039] Data organization and management: establish a spatial data index structure for data organization and management, and each node record contains the external cube of the node;

[0040] Spatial index: carry out spatial index on the 3D spatial data nodes, and judge whether the node cube meets the display requirements of the current viewing angle and distance.

[0041] In a specific embodiment, the framing: according to the framing range of the large-scale topographi...

Embodiment 2

[0056] figure 2 A schematic flow diagram of a method for organizing and managing a massive 3D digital city model provided in this embodiment, as shown in figure 2 As shown, the method follows the steps:

[0057] Framing: According to the fragmentation range of large-scale topographic maps of the city, the original data is produced, updated and archived with the map as a unit;

[0058] Data block division: divide the city range into data blocks, and make all data block files smaller than a certain threshold;

[0059] Data organization and management: establish a spatial data index structure for data organization and management, and each node record contains the external cube of the node;

[0060] Spatial index: carry out spatial index on the 3D spatial data nodes, and judge whether the node cube meets the display requirements of the current viewing angle and distance;

[0061] Data update: Automated tools are used to cut and encode data and update quadtrees.

[0062] In a...

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Abstract

The invention provides a mass three-dimensional digital city model organization and management method, and relates to the technical field of three-dimensional model construction. The method comprises the following steps that the range is divided according to a city large scale topographic map; data block division is performed on the range of the city; a spatial data index structure is established for performing data organization and management; and spatial indexing is performed on three-dimensional spatial data nodes. The advantages of the method are that the data loading efficiency is high so that the data consistency can be ensured, the complexity of performing unit minimization in the aspect of data file storage and archiving according to any boundary can be avoided and thus the aspect of data organization and management is enabled to be more orderly.

Description

[0001] 1. Technical field [0002] The invention relates to the technical field of three-dimensional model construction, in particular to a method for organizing and managing massive three-dimensional digital city models. [0003] 2. Technical background [0004] At present, 3D digital cities are playing an increasingly important role in urban planning, construction and management, and the construction of 3D digital cities is gradually being carried out in large and medium-sized cities. In order to truly reproduce the current situation and future of urban construction, it is necessary to collect the position and size data of urban buildings, structures and landscapes such as urban buildings, ground surfaces, roads, bridges, street lights, street signs, etc. by means of surveying and mapping. Combined with the current situation of collection, use Three-dimensional digital simulation is used to make a real model, which will generate a large amount of three-dimensional digital res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T17/05
CPCG06T17/005G06T17/05
Inventor 王永杰程良勇王海
Owner 星际空间(天津)科技发展有限公司
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