CN107291223A - A kind of super large data volume virtual reality space Information Visualization System and method - Google Patents
A kind of super large data volume virtual reality space Information Visualization System and method Download PDFInfo
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- CN107291223A CN107291223A CN201710423434.6A CN201710423434A CN107291223A CN 107291223 A CN107291223 A CN 107291223A CN 201710423434 A CN201710423434 A CN 201710423434A CN 107291223 A CN107291223 A CN 107291223A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F3/04815—Interaction with a metaphor-based environment or interaction object displayed as three-dimensional, e.g. changing the user viewpoint with respect to the environment or object
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- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/01—Indexing scheme relating to G06F3/01
- G06F2203/012—Walk-in-place systems for allowing a user to walk in a virtual environment while constraining him to a given position in the physical environment
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- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04802—3D-info-object: information is displayed on the internal or external surface of a three dimensional manipulable object, e.g. on the faces of a cube that can be rotated by the user
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Abstract
The present invention provides a kind of super large data volume virtual reality space Information Visualization System and system, system includes data process subsystem, mobile roaming subsystem, data loading subsystem, virtual reality display device and spatial information database, space three-dimensional data to super large data volume carry out stripping and slicing processing, and generate detail structure respectively to each data block and store；Dynamic load is carried out from spatial information database according to current location of the user in reality environment, the data of different levels are loaded including the far and near piecemeal according to distance, ensure that overall three-dimensional scenic is loaded completely, realize the virtual reality three-dimensional visualization under hundred GB grades even more big super large data volume.It by technical solution of the present invention, can support to realize super large data volume virtual reality space information visualization in common workstation, realize the mobile roaming under reality environment.
Description
Technical field
Patent of the present invention belongs to spatial geographic information visualization field, more particularly to general work station is in reality environment
The lower technical scheme for carrying out hundred GB grades of even more big super large data volume visualization of spatial information and virtual roaming.
Background technology
Spatial geographic information is that people are extracted from real world for the position abstracted information relevant with space, traditional
The carrier of spatial geographic information is mainly papery or electronic map, and the sky in these real worlds is recorded by the form of map
Between information.As mankind's activity scope constantly expands, city's spatial structure becomes increasingly complex, the spatial information two dimension of traditional map
Exhibition method relies on paper or computer, mobile telephone display, different from the view mode at the visual angle of people first.The appearance of three-dimensional data
Then user can be allow to be browsed, roamed with first person on two-dimensional screen.And the appearance of virtual reality technology
User is then set to realize the visual experience for browsing roaming of immersion under complete virtual environment, user as placed oneself in the midst of completely
Among virtual environment.
At the same time, the data volume that three-dimensional data is brought unprecedentedly is lifted, and virtual reality display device real-time rendering institute
The operand of consuming is bigger, and general computer can only ensure that the smoothness of small range three-dimensional scenic is rendered.And use laser measurement, incline
Tiltedly the photogrammetric three-dimensional data for waiting the City-level acquired in modern survey and draw technology often has hundred GB DBMSs amounts even more big,
The performance boundary of common workstation is surmounted significantly.Therefore, hundred GB data volumes even more big City-level space three-dimensional data without
Method carries out Visualization under reality environment.
The content of the invention
The problem of in order to solve above, the invention provides a kind of super large data volume virtual reality space information visualization skill
Art.Hundred GB grades of even more big super large data volume spatial information virtual reality can be provided for common workstation using the technology can
Depending on changing ability, the final City-level outdoor scene virtual roaming experience that immersion is provided for general user.
A kind of super large data volume virtual reality space Information Visualization System that the present invention is provided, including data processing subsystem
System, mobile roaming subsystem, data loading subsystem, virtual reality display device and spatial information database,
The data process subsystem, stripping and slicing processing is carried out for the space three-dimensional data to super large data volume, and to every
Individual data block generates detail structure respectively；
The spatial information database, for having the space of detail structure obtained by data storage processing subsystem
Three-dimensional data；
The mobile roaming subsystem, for adjusting current location of the user in virtual environment, and then realizes that user exists
Quick three-dimensional roaming in virtual environment；
The data load subsystem, are believed for realizing according to current location of the user in reality environment from space
Cease database and carry out dynamic load, include the data of the far and near piecemeal loading different levels according to distance；
The virtual reality display device, the three-dimensional data for loading subsystem loading completion according to data enters Mobile state
Render, show three-dimensional data visual content.
Moreover, the data process subsystem includes points cloud processing module, Triangulation Network Model processing module, at artificial model
Module and digital elevation model module are managed,
The points cloud processing module, for carrying out piecemeal to cloud data based on octotree data structure and vacuating, is formed
The detail structure of cloud data；
The Triangulation Network Model processing module, for Triangulation Network Model data to be cut and vacuated, so as to reduce list
The number of vertex and face number of individual model file, form the detail structure of Triangulation Network Model data；
Artificial model's processing module, for digital city model data to be cut and vacuated, so as to reduce list
The number of vertex and face number of individual model file, form the detail structure of artificial model's data；
The digital elevation model module, using raster data processing mode, is put down by neighborhood between data cutting and pixel
Sliding processing, forms the detail structure of Law of DEM Data.
Moreover, the mobile roaming subsystem includes fixed point mobile module and flight roam module,
The fixed point mobile module, it is real for by reaching the ray of user's handle transmitting and the joining position on ground
Fixed point movement of the existing user under ultra-large scene；
The flight roam module, for calculating translational speed according to three-dimensional scenic, by working as front to user's handle
To slowly being translated according to translational speed so as to reach flight effect, flight roaming of the user under ultra-large scene is realized.
Moreover, the fixed point mobile module, by receiving the tangential direction of user's operation handle, in user's push hand
During handle trigger button in operation handle tangential direction divergent-ray, user unclamp operation handle trigger button when judge transmitting
Ray and three-dimensional scenic joining；Including setting out road structure in three-dimensional scenic in advance, when joining falls in road
When upper, then current location of the user in virtual environment was adjusted at joining, and realized that long range fixed point in the scene was moved
It is dynamic.
Moreover, it is as follows according to three-dimensional scenic calculating translational speed,
Wherein, a, b are default coefficient, and B is default ratio, and h is the current height in virtual scene of user, and s is
The long edge lengths of three-dimensional scenic outsourcing rectangle, H is the altitude range of three-dimensional scenic.
Moreover, the far and near piecemeal according to distance loads the data of different levels, realization is as follows,
The corresponding relation between data block distance and three-dimensional data level of detail is defined, such as：
Wherein, L is plan range of the user in virtual reality scenario with each data block center, and s is data block width；
The current location that acquisition user is moved after roaming in reality environment by mobile roaming subsystem is sat
Mark P (X, Y)；
The need for being loaded according to user, the data block that corresponding species space three-dimensional data are divided is traveled through, according to data block
Center position coordinates Pn (Xn,Yn), calculate the air line distance with current position coordinatesAccording to
The relation R of data block distance and data details level determines the model detail level that current data block is loaded, and distance is nearer
The data quality that data block location is loaded is higher；
Need to load the corresponding three-dimensional data of the level finally according to the quality rank of data block location data and user.
Moreover, the position that data quality rank does not change before and after mobile need not repeat to load.
Moreover, after the completion of the loading of each data, being traveled through on backstage to all data, the height of the mobile front position of cleaning
Qualitative data.
Above-mentioned super large data volume virtual reality space Information Visualization System, for hundred GB grades or the super large data of the above
Measure three-dimensional data virtual reality space information visualization.
The present invention also provides a kind of super large data volume virtual reality space information visualization methods, including to super large data volume
Space three-dimensional data carry out stripping and slicing processing, and detail structure is generated respectively to each data block and stored；According to
Current location of the family in reality environment carries out dynamic load, including the distance point according to distance from spatial information database
Block loads the data of different levels, it is ensured that overall three-dimensional scenic is loaded completely, realizes in hundred GB grades of even more big super large data
Virtual reality three-dimensional visualization under amount.
How thin the present invention form by the three-dimensional data progress data processing to hundred GB grade even more big super large data volume
Hierarchical structure is saved, and judges that current location of the user in reality environment loads different fine degrees according to the distance of distance
Data, be finally reached the purpose that super large data volume virtual reality space information visualization is realized in common workstation.This hair
It is bright to have a variety of occupation modes, for example, a usage scenario is, introduces digital city threedimensional model and build City-level or even national level
Virtual reality three-dimensional map, user can go sight-seeing under virtual environment to city with first person.Another
Usage scenario is to introduce tourist attraction subtle three-dimensional model realization VR tourism, and user will not be subject traditional travel agency's time, OK
The constraint of journey etc., can be worth, lifting trip wish, and then stimulate tourist market by the more three-dimensional destination that obtains of virtual reality
Sustainable growth.Therefore, the present invention is easy to promote, with important market value.
Brief description of the drawings
Fig. 1 is the structural representation of the super large data volume virtual reality space Information Visualization System of the embodiment of the present invention.
Fig. 2 is the structural representation of the data process subsystem of the embodiment of the present invention.
Fig. 3 is the functional schematic of the mobile roaming subsystem of the embodiment of the present invention.
Fig. 4 is the model detail level distribution schematic diagram of the data block of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the implementation progress to technical solution of the present invention is retouched detailed completely
State.
Technical scheme proposed by the present invention, carries out structure optimization processing to hundred GB grades of three-dimensional data even above, is formed
The detail structure of three-dimensional data, according to current location of the user under virtual scene, the far and near loading according to distance is not
The data of same level, it is ensured that overall three-dimensional scenic is loaded completely, system smoothness operation is realized virtual under hundred GB grades of super large data volume
The visual purpose of real three-dimensional.The super large data volume virtual reality space Information Visualization System that the present invention is provided includes three-dimensional
Data process subsystem, mobile roaming subsystem, data loading subsystem, spatial information database and virtual reality show and set
It is standby.
Fig. 1 is the structural representation of super large data volume virtual reality space Information Visualization System provided in an embodiment of the present invention
Figure.Overflow as shown in figure 1, super large data volume virtual reality space Information Visualization System includes data process subsystem S1, movement
Alien's system S2, data loading subsystem S3, virtual reality display device S4 and spatial information database S5.Each system integration
To playing a role together.
Data process subsystem S1 is used to carry out stripping and slicing processing to the space three-dimensional data of super large data volume, and to every number
Generate detail structure respectively according to block, be as a result stored in spatial information database S5.In embodiment, by fixed point vacuate, office
The method such as domain is smooth, to super large data such as hundred GB grades of cloud data, artificial model's data, Triangulation Network Model and digital elevation models
The three-dimensional data of amount carries out stripping and slicing, reduction quality processing, the detail structure of data is generated, for subsequently entering according to demand
Row piecemeal dynamic load.Further, data process subsystem described in embodiment includes points cloud processing module, Triangulation Network Model
Processing module, artificial model's processing module and digital elevation model module, referring to Fig. 2：
S11 is the points cloud processing module in data process subsystem S1, and the module is carried out at data using octree structure
Reason, can be vacuated and subdivision to the three dimensional point cloud that ground laser radar and airborne laser radar observation are obtained, generate point
The detail structure of cloud data.
S12 is the Triangulation Network Model processing module in data process subsystem S1, and S13 is in data process subsystem S1
Artificial model's processing module, they by oblique photograph respectively to the Triangulation Network Model data and artificial system that mode is generated such as measuring
The digital city model data of work is cut and vacuated, so that the number of vertex and face number of single model file are reduced, difference shape
Into Triangulation Network Model data and the detail structure of artificial model's data.
S14 is the digital elevation model module in data process subsystem S1, using raster data processing method, passes through number
Handled according to neighbor smoothing between cutting and pixel, form the detail structure of Law of DEM Data.
The present invention is proposed, stripping and slicing is first carried out to original three-dimensional data, then form many levels of detail respectively to each data block
Secondary structure.Due to the three-dimensional data of variety classes, different accuracy, it is impossible to reach system in the relation of data area and data volume
One, it is preferable that certain model is being cut or during subdivision, if the data volume of each data block after cutting is M, total number
It is N according to amount, by the data block that data are cut or subdivision is K regular shape, wherein K=N/M.It is preferred that, when the work used
When saving as S in standing, M suggestion values are M=S/50, so limit the most fine mould that work station most multipotency loads 50 data blocks
Type, it is ensured that performance is stable.
Vacuated and to digital elevation model progress neighborhood carrying out fixed point to cloud data, Triangulation Network Model, artificial model
During smoothing processing, the present invention proposes that all data blocks are carried out using predetermined multiple to vacuate dilute and neighbor smoothing, so as to be formed
The detail structure of three-dimensional data, such as data block original data volume are K0When, the data volume of n-th layer timeWherein
CnDefault for n-th layer vacuates multiple, and value can be preset by those skilled in the art during specific implementation.
The specific data processing method such as octree structure of each module can use prior art in data process subsystem, this
It will not go into details for invention.
As Fig. 1, data process subsystem S1 arrive the three-dimensional data storage with detail structure for handling completion
In spatial information database S5, in case managing and using.
Mobile roaming subsystem S2, for adjusting current location of the user in virtual environment, and then realizes user in void
Quick three-dimensional roaming in near-ring border, realizes the conversion of customer location under the reality environment of larger data amount, and institute is proper
Front position input data loading subsystem.In embodiment, adjust user by pinpointing mobile, flight two kinds of move modes of roaming and exist
Current location in virtual environment, and then realize quick three-dimensional roaming of the user in virtual environment.Further, the movement
Roaming subsystem includes fixed point mobile module and flight roam module, the fixed point mobile module, for by reaching user's hand
The ray of handle transmitting and the joining position on ground, realize fixed point movement of the user under ultra-large scene；The flight roaming mould
Block, for according to three-dimensional scenic calculate translational speed, by user's handle when front direction is slowly translated according to translational speed
So as to reach flight effect, flight roaming of the user under ultra-large scene is realized.Referring to Fig. 3：
Mobile module S21 is pinpointed, the module is by receiving the tangential direction of user's operation handle, in user's push hand
During handle (pre-defined) trigger button in operation handle tangential direction divergent-ray, user unclamp operation handle trigger press
The ray of transmitting and the joining of three-dimensional scenic are judged during key.The color of ray and joining is typically using more bright green
Or yellow.Further, the structures such as road are set out in three-dimensional scenic in advance, when joining falls on road, then will be used
Current location of the family in virtual environment is adjusted at joining, realizes long range fixed point movement in the scene.
Flight roam module S22, the module calculates translational speed according to three-dimensional scenic, is pressed (pre-defined) in user
During forward key, the tangential direction of user's operation handle is received frame by frame and is set as velocity attitude, calculate in when the current frame and use
The displacement vector at family simultaneously calculates current location of user's present frame in virtual scene.General, flight roaming does not set ground
Structure etc., user can arbitrarily fly in whole reality environment, realize flight roaming in the scene.
Present invention further propose that, three-dimensional scenic is set to rectangle, and the preferred computational methods of translational speed are:
Wherein, a, b are default coefficient, and B is default ratio, and h is the current height in virtual scene of user, and s is
The long edge lengths of three-dimensional scenic outsourcing rectangle, H is the altitude range of three-dimensional scenic.When it is implemented, a, B can use experience respectively
Value, for example it is estimated fly over three-dimensional scenic when a length of 30 seconds, then set a as 30, the height of pre-set user currently in virtual scene
Using at the uniform velocity relatively slow flight during less than 0.25H, then B=0.25 is set, and set b=a/B.
In embodiment, the computational methods of translational speed are:Wherein, h is that user currently exists
Height in virtual scene, s is the long edge lengths of three-dimensional scenic outsourcing rectangle, and H is the altitude range of three-dimensional scenic.
Data load subsystem S3, for realizing according to current location of the user in reality environment from spatial information
Database carries out dynamic load, includes the data of the far and near piecemeal loading different levels according to distance, as a result inputs virtual reality
Display device, is realized according to current location dynamic load hundred GB grade of the user in reality environment even more big super large number
It is also the core technology of this patent according to amount three-dimensional data.
The present invention proposes that data load current location of the subsystem according to user under virtual environment, according to the remote of distance
Closely read from spatial information database and load the three-dimensional data of different fine degrees into virtual reality scenario.Can be to
User integrally shows macroscopical scene and not lost near customer location on the premise of three-dimensional data precision, and system can be in unskilled labor
Smooth, stable operation in standing.
In embodiment, first obtain user and pass through the current position coordinates P after S2 mobile roamings in reality environment；Again
The data block of all detail structures in spatial information database is traveled through, according to the center position coordinates Pn of data block, meter
Calculate the air line distance L with current position coordinates；Then, weighed surely according to air line distance L inverse, calculate the data block location data
Quality rank, i.e. the data quality that is loaded of the nearer data block location of distance is higher；Finally according to data block location data
Quality rank load the three-dimensional data of the level, it is mobile before and after the position that does not change of data quality rank do not repeat plus
Carry.
The corresponding relation between data block distance and three-dimensional data level of detail is defined first, such as：
Wherein L is plan range of the user in virtual reality scenario with each data block center, and s is data block width.
Then, obtain user and pass through the current location after mobile roaming subsystem S2 mobile roamings in reality environment
Coordinate P (X, Y)；(cloud data, digital elevation model, Triangulation Network Model or artificial model's number the need for being loaded further according to user
One of according to etc.), all data blocks divided in advance are traveled through, according to the center position coordinates Pn (X of data blockn,Yn), calculate with working as
The air line distance of front position coordinateAccording to data block distance and the relation of data details level
R determines the model detail level that current data block is loaded, i.e., the data quality that the nearer data block location of distance is loaded is more
It is high；Need to load the corresponding three-dimensional data of the level (point cloud number finally according to the quality rank of data block location data and user
According to, digital elevation model, Triangulation Network Model or artificial model's data etc.), it is mobile before and after data quality rank do not change
Position need not repeat to load.For example, the model detail level distribution of each data block is as shown in Figure 4.
In addition, present invention further propose that, after the completion of the loading of each data, all data are traveled through on backstage,
The high-quality data of the mobile front position of cleaning, that is, realize that internal memory is cleared up, it is ensured that the stable smooth operation of system, subsequently in new position
Low-quality data can be reloaded by putting.
Virtual reality display device S4 is used to enter Mobile state wash with watercolours according to the three-dimensional data that data load subsystem loading completion
Dye, shows three-dimensional data visual content, the effect of three dimensional display is served as user's visual interface.When it is implemented,
S4 enters Mobile state to the three-dimensional data that completion is loaded in system according to user current location and head pose and rendered, and shows three dimensions
It is general to use commercialization VR hardware devices according to visual content.
Preferably, virtual reality display device can be virtual implementing helmet or virtual reality glasses.Spatial information data
Storehouse S5, the space three-dimensional number with detail structure of completion is handled for storing and managing data process subsystem in advance
According to.Spatial information database can be stored in locally, can also access cloud database by LAN etc., son is loaded by data
System position according to obtained by mobile roaming subsystem is called.
In summary, the super large data volume virtual reality space Information Visualization System provided using the present invention, Yong Huke
To realize the virtual reality space information visualization with hundred GB grades of even more big super large data volume in common workstation, very
Runnability problems of the spatial information big data under reality environment are solved well, under being follow-up reality environment again
The analysis and virtual emulation for realizing spatial information big data provide premise.
The embodiment of the present invention also provides a kind of super large data volume virtual reality space information visualization methods, including to super large
The space three-dimensional data of data volume carry out stripping and slicing processing, and generate detail structure respectively to each data block and store；
Dynamic load is carried out from spatial information database according to current location of the user in reality environment, including according to distance
Far and near piecemeal loads the data of different levels, it is ensured that overall three-dimensional scenic is loaded completely, realizes and surpasses hundred GB grade even more big
Virtual reality three-dimensional visualization under big data quantity.
Automatic running can be realized using software engineering during specific implementation, reference can be made to accordingly being realized in system, the present invention is refused
Repeat.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (10)
1. a kind of super large data volume virtual reality space Information Visualization System, it is characterised in that：Including data process subsystem,
Mobile roaming subsystem, data loading subsystem, virtual reality display device and spatial information database,
The data process subsystem, stripping and slicing processing is carried out for the space three-dimensional data to super large data volume, and to every number
Generate detail structure respectively according to block；
The spatial information database, for having the space three-dimensional of detail structure obtained by data storage processing subsystem
Data；
The mobile roaming subsystem, for adjusting current location of the user in virtual environment, and then realizes user virtual
Quick three-dimensional roaming in environment；
The data load subsystem, for realizing according to current location of the user in reality environment from spatial information number
Dynamic load is carried out according to storehouse, includes the data of the far and near piecemeal loading different levels according to distance；
The virtual reality display device, the three-dimensional data for loading subsystem loading completion according to data enters Mobile state wash with watercolours
Dye, shows three-dimensional data visual content.
2. super large data volume virtual reality space Information Visualization System according to claim 1, it is characterised in that：The number
Include points cloud processing module, Triangulation Network Model processing module, artificial model's processing module and digital elevation mould according to processing subsystem
Pattern block,
The points cloud processing module, for carrying out piecemeal to cloud data based on octotree data structure and vacuating, forms point cloud
The detail structure of data；
The Triangulation Network Model processing module, for Triangulation Network Model data to be cut and vacuated, so as to reduce single mould
The number of vertex and face number of type file, form the detail structure of Triangulation Network Model data；
Artificial model's processing module, for digital city model data to be cut and vacuated, so as to reduce single mould
The number of vertex and face number of type file, form the detail structure of artificial model's data；
The digital elevation model module, using raster data processing mode, by between data cutting and pixel at neighbor smoothing
Reason, forms the detail structure of Law of DEM Data.
3. super large data volume virtual reality space Information Visualization System according to claim 1, it is characterised in that：It is described to move
Animation alien system includes fixed point mobile module and flight roam module,
The fixed point mobile module, for by reaching the ray of user's handle transmitting and the joining position on ground, realizing and using
Fixed point movement of the family under ultra-large scene；
The flight roam module, for according to three-dimensional scenic calculate translational speed, by user's handle when front direction is pressed
Slowly translate to reach flight effect according to translational speed, realize flight roaming of the user under ultra-large scene.
4. super large data volume virtual reality space Information Visualization System according to claim 3, it is characterised in that：It is described fixed
Point mobile module, by receiving the tangential direction of user's operation handle, in user's push handle trigger button in operation
Divergent-ray in handle tangential direction, the ray and three-dimensional scenic of transmitting are judged when user unclamps operation handle trigger button
Joining；Including setting out road structure in three-dimensional scenic in advance, when joining falls on road, then by user virtual
Current location in environment is adjusted at joining, realizes long range fixed point movement in the scene.
5. super large data volume virtual reality space Information Visualization System according to claim 3, it is characterised in that：According to three
Tie up scene calculating translational speed as follows,
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<mo>=</mo>
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Wherein, a, b are default coefficient, and B is default ratio, and h is the current height in virtual scene of user, and s is three-dimensional
The long edge lengths of scene outsourcing rectangle, H is the altitude range of three-dimensional scenic.
6. super large data volume virtual reality space Information Visualization System according to claim 1, it is characterised in that：According to away from
From far and near piecemeal load different levels data, realize it is as follows,
The corresponding relation between data block distance and three-dimensional data level of detail is defined, such as：
<mrow>
<mi>R</mi>
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Wherein, L is plan range of the user in virtual reality scenario with each data block center, and s is data block width；
Acquisition user moves the current position coordinates P after roaming in reality environment by mobile roaming subsystem
(X,Y)；
The need for being loaded according to user, the data block that corresponding species space three-dimensional data are divided is traveled through, according to the center of data block
Position coordinates Pn (Xn,Yn), calculate the air line distance with current position coordinatesAccording to data
The relation R of block distance and data details level determines the model detail level that current data block is loaded, the nearer data of distance
The data quality that block position is loaded is higher；
Need to load the corresponding three-dimensional data of the level finally according to the quality rank of data block location data and user.
7. super large data volume virtual reality space Information Visualization System according to claim 6, it is characterised in that：Before movement
The position that data quality rank does not change afterwards need not repeat to load.
8. super large data volume virtual reality space Information Visualization System according to claim 6, it is characterised in that：Each
After the completion of data loading, all data are traveled through on backstage, the high-quality data of the mobile front position of cleaning.
9. the super large data volume virtual reality space information visualization according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8
System, it is characterised in that：For hundred GB grades or the super large data volume three-dimensional data virtual reality space information visualization of the above.
10. a kind of super large data volume virtual reality space information visualization methods, it is characterised in that：Including to super large data volume
Space three-dimensional data carry out stripping and slicing processing, and generate detail structure respectively to each data block and store；According to user
Current location in reality environment carries out dynamic load, including the far and near piecemeal according to distance from spatial information database
Load the data of different levels, it is ensured that overall three-dimensional scenic is loaded completely, realize in hundred GB grades of even more big super large data volume
Under virtual reality three-dimensional visualization.
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