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ArcGIS-based large-scale three-dimensional city scene generation method

A large-scale, urban technology, applied in the fields of smart cities, ArcGIS data processing, and 3D visualization, can solve the problems that buildings cannot fit the actual situation, take a long time, and cannot display the real layout of the city, etc., and achieve a good effect of assisting decision-making

Active Publication Date: 2021-11-02
四川易方智慧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are two types of general 3D urban scene generation, one is direct and automatic generation, through the urban shape data, randomly generates various types of buildings and greening in the scene, the disadvantage is that buildings are randomly generated, and most of the generated buildings cannot fit the actual situation , cannot show the real layout of the city
One is to generate urban scenes through manual modeling and manual placement. The disadvantage is that the workload is heavy and time-consuming

Method used

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  • ArcGIS-based large-scale three-dimensional city scene generation method
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  • ArcGIS-based large-scale three-dimensional city scene generation method

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Embodiment 1

[0042] A large-scale 3D urban scene generation method based on ArcGIS includes the following steps:

[0043] Steps to establish a model library: the model library includes a building model library and an environmental model library;

[0044] The architectural model library contains various types of architectural models. According to POI (POI: Point of interest. The Chinese name "point of interest" means any meaningful point on the map that is not geographically meaningful: such as shops, bars, gas stations, hospitals, Station.) The classification divides the model into a specific type of building, specifically divided into two types: medium and small. The medium category is the building category, and the small category is the building with a specific name. Each medium category contains a default model;

[0045] The building model library records various attributes of the building model, including: building model file, building model number, building category, building model na...

Embodiment 2

[0057] According to the POI classification, buildings are divided into residential buildings, office buildings, shopping malls, hospitals, schools, public services and park building types.

Embodiment 3

[0059] All building outlines are a series of longitude and latitude coordinates in the data storage. First, the Mercator projection transformation is used to convert all the longitude and latitude coordinates into two-dimensional coordinates. Four variables maxX, minX, maxY, and minY are set to represent the horizontal and vertical coordinates of the building outline. extreme value;

[0060] Take the first coordinate point, assign its abscissa to maxX and minX by default, and assign its ordinate to maxY and minY, and traverse each coordinate point in turn;

[0061] If the abscissa of the judgment point is greater than maxX, replace the value of maxX; if it is smaller than minX, replace minX;

[0062] If the ordinate of the judgment point is greater than maxY, replace the value of maxY, if it is less than minY, replace minY; after the traversal judgment is completed, (minX, minY), (minX, maxY), (maxX, maxY), (maxX, minY) is the enveloping rectangle of the building outline, the...

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Abstract

The invention discloses an ArcGIS-based large-scale three-dimensional city scene generation method. The method comprises the following steps of: a step of establishing a model library, wherein the model library comprises a building model library and an environment model library; taking a building contour envelope rectangle; a classification step: using ArcMap to extract shape data of a target city range class, and sorting and classifying the data; a building model matching step: firstly, finding a building table of a corresponding category according to the recorded category of the building contour, comparing the extracted building name with the building name in the model library, if the extracted building name is the same as the building name in the model library, using the building model, and if the extracted building name is not the same as the building name in the model library, using the default building model of each middle category; and a city scene generation step: after the building model is placed, setting an environment model according to an actual situation. The invention has the advantages that the three-dimensional scene of the city can be deeply and quickly restored, the actual regional division can be reflected, the characteristics of the city can be well displayed, and a good auxiliary decision-making effect can be achieved for city planning.

Description

technical field [0001] The invention relates to the fields of ArcGIS data processing, smart city, three-dimensional visualization and the like, and in particular relates to a large-scale three-dimensional city scene generation method based on ArcGIS. Background technique [0002] Urban planning has always been one of the most urgent areas for new visualization technology. At each stage of planning, people's living environment is improved by depicting the current situation and the future. The traditional urban layout plan is two-dimensional Form display, users cannot observe and understand the city layout intuitively and easily, and the analysis work is relatively cumbersome. The emergence of urban 3D scene generation technology enables users to roam in the scene in all directions and in various styles, and is completely controlled by the user. Scenes can bring a good visual experience. [0003] There are two types of general 3D urban scene generation, one is direct and aut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06Q50/26G06K9/62G06F30/13
CPCG06T17/00G06F30/13G06Q50/26G06F18/241Y02A30/60
Inventor 刘双侨伍烜东邓鸿耀
Owner 四川易方智慧科技有限公司
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