CN103440118B - The multi-level display packing of paging based on three-dimensional digital city system model - Google Patents
The multi-level display packing of paging based on three-dimensional digital city system model Download PDFInfo
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- CN103440118B CN103440118B CN201310390033.7A CN201310390033A CN103440118B CN 103440118 B CN103440118 B CN 103440118B CN 201310390033 A CN201310390033 A CN 201310390033A CN 103440118 B CN103440118 B CN 103440118B
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Abstract
The present invention relates to a kind of multi-level display packing of paging based on three-dimensional digital city system model, its step is as follows: (1), utilizes computer, computer graphical video card, digital camera and stereoscopic image measurement instrument to set up three-dimensional stereo model by the artificial three-dimensional framework gathering geographical information three-dimensional target, is fitted on three-dimensional stereo model by the threedimensional model pinup picture that digital camera obtains and produces three-dimensional digital city system；(2), the monomer model in three-dimensional digital city system is divided into 3 ranks according to the geography distance on the spot of the viewpoint in three-dimensional digital city system to monomer model center: first level is fine display model, second level is common display model, and third level is rough display model；(3), formulate step (2) in fine display model, calling rule between common display model and rough display model.The inventive method can quickly show the monomer model in magnanimity threedimensional model, and the time is short, and efficiency is high, relatively low to hardware requirement.
Description
Technical field
The invention belongs to display field, three-dimensional digital city, especially a kind of based on three-dimensional digital city
The multi-level display packing of paging of system model.
Background technology
When traditional three-dimensional digital city system shows threedimensional model in form, generally by form
After all of three dimensional monolithic model finds in geospatial area, from data base, call in internal memory, then
Put in video card from internal memory and show, if do so refined model to be shown, three will be made
Dimension word city system is blocked time when browsing very much, even can send out in the case of model data excess
Raw computer corruption, the phenomenon of collapse.If simple model to be shown, the effect that system shows is just
Having a greatly reduced quality, display effect is very poor.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of in massive geographical information
The method of quick displaying monomer model in threedimensional model, the method can quickly show that magnanimity is three-dimensional
Monomer model in model, the time is short, and efficiency is high, relatively low to hardware requirement.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of multi-level display packing of paging based on three-dimensional digital city system model, its step is such as
Under:
(1), utilize computer, computer graphical video card, digital camera and stereoscopic image measurement instrument
Three-dimensional stereo model is set up, the most again by the artificial three-dimensional framework gathering geographical information three-dimensional target
The threedimensional model pinup picture that digital camera obtains is fitted on three-dimensional stereo model and produces 3-dimensional digital
City system；
(2), by the monomer model in three-dimensional digital city system according in three-dimensional digital city system
Viewpoint is divided into 3 ranks to the geography distance on the spot at monomer model center: first level is fine
Display model, second level is common display model, and third level is rough display model；
(3), formulate step (2) in fine display model, common display model and rough display model
Between calling rule, this calling rule be the three dimensional monolithic model that current system form shows be
During one rank, the second level model data of this three dimensional monolithic model is called in internal memory from data base
In standby, when when system browses, viewpoint is changed to second level relative to this model sighting distance, directly by interior
The second level model data deposited is directly placed in video card display, and by the first level in video card
Model data discharges；When the three dimensional monolithic model that current window shows is second level, by this three
First level and the third level model data of dimension monomer model are called in internal memory standby from data base
With, when when system browses, viewpoint is changed to first level or third level relative to this model sighting distance, directly
Connect and the model data of the appropriate level in internal memory is directly placed in video card display, and by video card
Second level model data discharges；When the three dimensional monolithic model that current window shows is third level,
The second level model data of this three dimensional monolithic model is called in internal memory standby from data base, is
When system browses, viewpoint is changed to second level relative to this model sighting distance, directly by second in internal memory
Level model data are directly placed in video card display, and the third level model data in video card are released
Bleed off；
(4), realize paging based on three-dimensional digital city system model according to calling rule multi-level aobvious
Show.
And, described first level is 0-200 rice.
And, described second level is more than 200-1000 rice.
And, described third level is more than 1000-3000 rice.
Advantages of the present invention and having the beneficial effect that
1, this multi-level display packing of paging based on three-dimensional digital city system model utilizes grader
System, the display refined model that distance observer is near, it is ensured that high-quality display effect, distance is observed
The medium model of display that person is medium, visually effect is constant, but data and resource occupation significantly drop
Low, distance observer's display simple model farther out, visually effect is constant, greatly reduces number
According to the taking of resource, be possible not only to ensure the display effect of three-dimensional digital city system by this rule,
But also can ensure that the display that system can be smooth, stable operation.And system can be reduced
The requirement of application hardware, can also realize the height of three-dimensional digital city even with general commercial PC
Effect, high-quality display.
What 2, the present invention can be greatly improved that geography information threedimensional model display efficiency and system run is steady
Qualitative.The read volume of model data can be greatly decreased by the way of classification, improve display effect
Rate, uses the method system can show the finest threedimensional model, ensure that display quality
The most greatly reduce with the requirement that in the case of effect, system is run computer, use ordinary PC
The effect that traditional method realizes on advanced figure work station can also be completed, reduce for user
Hardware use cost.Utilize the method stability that system run can be greatly improved, due to video card
The deadlock situation of overload can be avoided completely, it is achieved smooth display.
Detailed description of the invention
Below by specific embodiment, the invention will be further described, and following example simply describe
Property, it not determinate, it is impossible to limit protection scope of the present invention with this.
A kind of multi-level display packing of paging based on three-dimensional digital city system model, its step is such as
Under:
(1), utilize computer, computer graphical video card, digital camera and stereoscopic image measurement instrument
Three-dimensional stereo model is set up, the most again by the artificial three-dimensional framework gathering geographical information three-dimensional target
The threedimensional model pinup picture that digital camera obtains is fitted on three-dimensional stereo model and produces 3-dimensional digital
City system；
(2), by the monomer model in three-dimensional digital city system according in three-dimensional digital city system
Viewpoint is divided into 3 ranks to the geography distance on the spot at monomer model center: first level is fine
Display model, first level is 0-200 rice, and second level is common display model, second level
For more than 200-1000 rice, third level is rough display model, and third level is for being more than
1000-3000 rice；
(3), formulate step (2) in fine display model, common display model and rough display model
Between calling rule, this calling rule be the three dimensional monolithic model that current system form shows be
During one rank, the second level model data of this three dimensional monolithic model is called in internal memory from data base
In standby, when when system browses, viewpoint is changed to second level relative to this model sighting distance, directly by interior
The second level model data deposited is directly placed in video card display, and by the first level in video card
Model data discharges；When the three dimensional monolithic model that current window shows is second level, by this three
First level and the third level model data of dimension monomer model are called in internal memory standby from data base
With, when when system browses, viewpoint is changed to first level or third level relative to this model sighting distance, directly
Connect and the model data of the appropriate level in internal memory is directly placed in video card display, and by video card
Second level model data discharges；When the three dimensional monolithic model that current window shows is third level,
The second level model data of this three dimensional monolithic model is called in internal memory standby from data base, is
When system browses, viewpoint is changed to second level relative to this model sighting distance, directly by second in internal memory
Level model data are directly placed in video card display, and the third level model data in video card are released
Bleed off；
(4), realize paging based on three-dimensional digital city system model according to calling rule multi-level aobvious
Show.
The present invention applies when system browse operation, and the geospatial area that form shows can become
Changing, during change, viewpoint also can change accordingly to the geography distance on the spot at monomer model center,
When changing to be switched to another rank from a rank, in order to allow system display model time switching
Transition natural, mild, generally data base will call internal memory and the level model that shows
But adjacent level model is also called in internal memory is not shown, in order to prepare this rank the most permissible
It is switched into video card and shows referred to as paging.
Claims (1)
1. the multi-level display packing of paging based on three-dimensional digital city system model, its feature
It is: the step of the method is as follows:
(1), utilize computer, computer graphical video card, digital camera and stereoscopic image measurement instrument
Three-dimensional stereo model is set up, the most again by the artificial three-dimensional framework gathering geographical information three-dimensional target
The threedimensional model pinup picture that digital camera obtains is fitted on three-dimensional stereo model and produces 3-dimensional digital
City system；
(2), by the monomer model in three-dimensional digital city system according in three-dimensional digital city system
Viewpoint is divided into 3 ranks to the geography distance on the spot at monomer model center: first level is fine
Display model, first level is 0-200 rice, and second level is common display model, second level
For more than 200-1000 rice, third level is rough display model, and third level is for being more than
1000-3000 rice；
(3), formulate step (2) in fine display model, common display model and rough display model
Between calling rule, this calling rule be the three dimensional monolithic model that current system form shows be
During one rank, the second level model data of this three dimensional monolithic model is called in internal memory from data base
In standby, when when system browses, viewpoint is changed to second level relative to this model sighting distance, directly by interior
The second level model data deposited is directly placed in video card display, and by the first level in video card
Model data discharges；When the three dimensional monolithic model that current window shows is second level, by this three
First level and the third level model data of dimension monomer model are called in internal memory standby from data base
With, when when system browses, viewpoint is changed to first level or third level relative to this model sighting distance, directly
Connect and the model data of the appropriate level in internal memory is directly placed in video card display, and by video card
Second level model data discharges；When the three dimensional monolithic model that current window shows is third level,
The second level model data of this three dimensional monolithic model is called in internal memory standby from data base, is
When system browses, viewpoint is changed to second level relative to this model sighting distance, directly by second in internal memory
Level model data are directly placed in video card display, and the third level model data in video card are released
Bleed off；
(4), realize paging based on three-dimensional digital city system model according to calling rule multi-level aobvious
Show.
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| CN103995644B (en) * | 2014-05-23 | 2017-06-23 | 中国电建集团成都勘测设计研究院有限公司 | The method for realizing three-dimensional geographic information system and 3 d graphics system linkage fusion |
| CN105069018B (en) * | 2015-07-13 | 2018-08-03 | 中车青岛四方机车车辆股份有限公司 | A kind of plant area's model roaming browsing method and system based on CATIA platforms |
| CN110264575A (en) * | 2019-06-10 | 2019-09-20 | 国家电网有限公司 | A kind of cable three-dimensional display method |
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| JP2004144524A (en) * | 2002-10-22 | 2004-05-20 | Terra Matrix Co Ltd | Topographic electronic information providing system by interference synthetic aperture radar observation |
| CN102184570A (en) * | 2011-04-28 | 2011-09-14 | 广东省电力设计研究院 | Three-dimensional optimization and line selection system, method and device for roaming establishment in stereoscopic scenes of three-dimensional optimization and line selection system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004144524A (en) * | 2002-10-22 | 2004-05-20 | Terra Matrix Co Ltd | Topographic electronic information providing system by interference synthetic aperture radar observation |
| CN102184570A (en) * | 2011-04-28 | 2011-09-14 | 广东省电力设计研究院 | Three-dimensional optimization and line selection system, method and device for roaming establishment in stereoscopic scenes of three-dimensional optimization and line selection system |
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| 网络三维GIS若干技术问题研究;施家松;《中国优秀博硕士学位论文全文数据库（硕士）基础科学辑》;20070615;第2007卷(第6期);第3.1.4-3.1.5，3.2.1，4.2.2-4.2.3节，附图4.6 * |
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Effective date of registration: 20210222 Address after: 300000 9 Changling Road, liqizhuang, Xiqing District, Tianjin Patentee after: Tianjin Institute of Surveying and mapping Co.,Ltd. Patentee after: TIANJIN JINYU INFORMATION TECHNOLOGY Co.,Ltd. Address before: 300381 Tianjin Institute of Surveying and mapping, Changling Road, liqizhuang, Xiqing District, Tianjin Patentee before: Tianjin City Patentee before: TIANJIN JINYU INFORMATION TECHNOLOGY Co.,Ltd. |