CN106683183B - A kind of online three-dimensional visualization method of construction project model - Google Patents
A kind of online three-dimensional visualization method of construction project model Download PDFInfo
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Abstract
The invention discloses a kind of online three-dimensional visualization methods of construction project model, belong to construction project field.The following steps are included: first, application and construction engineering design achievement carries out the three-dimensional simulation based on high-precision landform, secondly, by the Conversion of Spatial Data of construction project threedimensional model at high accuracy number elevation model, and merged with low Accuracy Figure elevation model data；Then, the associated texture of construction project threedimensional model and the open a wide range of image data obtained are inlayed；Finally, the image based on fused digital elevation model and after inlaying, additive fusion obtain visual construction project model.The present invention uses high accuracy data resource, constructs to construction project threedimensional model；Using the retrievable geography information in internet as background, it is merged with construction project threedimensional model, and fused data resource is showed into the public, to efficiently solve the contradiction between the utilization of resources and privacy policy, the service ability of geographic information resources will be greatly facilitated.
Description
Technical field
The present invention relates to engineering construction fields, more particularly to the online three-dimensional visualization method of building engineering model.
Background technique
Mapping geography information achievement is the strategic information resource of relationship national sovereignty, safety and interests, by national phase
Close the strict protection of privacy policy.Under the driving of application demand, a large amount of geographic information resources of surveying and drawing can pass through public affairs
The channel opened obtains and application, but these outcome data precision are lower, are only capable of in terms of macro-management and large scale Analysis Service
It plays a role, and there is still a need for the higher geographic information resources of precision as branch in terms of urban planning, design and precision management
Support.Comprehensive with IT application in government affairs carries out and the rise of smart city construction in recent years, in construction project planning and design process
It is more more and more urgent while also increasing to the type requirements of data resource to Up-to-date state height, surveying and mapping result demand with high accuracy.
This forms the contradiction that can not be reconciled between data confidentiality policy.
Directly carry out the three-dimensional display of construction project using open resource, then precision is inadequate, it is difficult to effective expression engineering letter
Breath is unable to reach the target of application on site because of privacy problem, this contradiction but if directly utilizing high-precision geography information
The Asymmetry information etc. between data requirements and data service is resulted in, a large amount of precise information utilization rates are low, and mass data needs
It asks and is not being met.
Summary of the invention
In view of, with managerial drawbacks described above, technical problem to be solved by the invention is to provide one kind in the prior art
The online three-dimensional visualization method of construction project model.The present invention is directed to be needed in the data that different phase was planned and designed to construction project
It asks and the service of differentiation is provided, joined using high accuracy data resource in achievements exhibition and the public in three-dimensional simulation and analysis phase
With stage, the data resource merged using high-precision and low precision, to efficiently solve between the utilization of resources and privacy policy
Contradiction, the service ability of geographic information resources will be greatly facilitated.
To achieve the above object, the present invention provides a kind of online three-dimensional visualization methods of construction project model, including with
Lower step:
Step S1, application and construction engineering design achievement carries out the three-dimensional simulation based on high-precision landform: in high-precision three-dimensional
On the basis of landform, application and construction engineering design achievement is modeled using 3 d modeling software by hand or using three-dimensional Computer Aided Design
System constructs construction project threedimensional model；
Step S2, by the Conversion of Spatial Data of the construction project threedimensional model at high accuracy number elevation model, and with
The open a wide range of low Accuracy Figure elevation model data obtained is merged；
Step S3, the associated texture of the construction project threedimensional model and the open a wide range of image data obtained are carried out
It inlays；
Step S4, the image based on fused digital elevation model and after inlaying creates digital terrain model, obtains height
The visual construction project threedimensional model of precision.
In the technical scheme, in three-dimensional simulation and analysis phase, using high accuracy data resource, to construction project three-dimensional
Model is constructed；Using the retrievable geography information in internet as background, and merged with construction project threedimensional model, it will be high
Precision and the data resource of low precision fusion show the public, to efficiently solve the lance between the utilization of resources and privacy policy
Shield will be greatly facilitated the service ability of geographic information resources.
Furthermore, the step S2 includes:
Step S21, the spatial data of the construction project threedimensional model is separated, obtains multiple continuous spatial modes
Type indicates are as follows:
CMS{CM1, CM2..., CMn}
Wherein, each CMiRepresent spatially continuous threedimensional model segment；
Step S22, to each construction project threedimensional model segment CMi, extract each threedimensional model segment letter in model
T is ceased, the data format CMF with elevation information that can be identified by GIS software is converted intoi；
Step S23, to each CMFi, digital complex demodulation _ CM is converted into using GIS software；It is noted that
Using digital complex demodulation _ CM, guarantee that the precision of model can embody the spatial detail of construction project；
Step S24, to the DEM_CM after conversion, its coordinate is converted to what public data resource used using GIS software
Coordinate system；
Step S25, it to the open a wide range of low Accuracy Figure elevation model obtained, is handled using GIS software, makes it
Precision is consistent with DEM_CM precision, the digital complex demodulation _ NET that obtains that treated；
Step S26, DEM_CM and DEM_NET are merged using GIS software, obtains fused digital elevation model
DEM_R。
In the technical scheme, construction project threedimensional model is split as threedimensional model segment, is converted into elevation model, and
Its coordinate is converted into the open coordinate system that public data uses, and is merged with disclosed low Accuracy Figure elevation model.
The technical solution, which is effectively ensured, really to reflect the spatial shape of construction project, while avoiding using concerning security matters when application on site
, high-precision geographic information resources, solve the contradiction for using and maintaining secrecy.
Furthermore, in the step S26, if the digital complex demodulation _ CM and the digital elevation model
There are overlapping regions by DEM_NET, then take the height value of the digital complex demodulation _ CM high as the fused number
The height value of journey model DEM_R；White space if it exists then fills corresponding height value using mean difference method.
In the technical scheme, in two elevation model laps, select the digital complex demodulation of degree of precision _
CM, to guarantee really to reflect the spatial shape of construction project.Meanwhile interpolation processing is carried out to white space, it improves high and low
The natural transition effect of splicing regions between Accuracy Figure relief model.
Furthermore, the step S3 includes:
Step S31, under three-dimensional display mode, camera lens are set to vertically downward；
Step S32, a camera information PC is set, is indicated are as follows:
PC { X, Y, Z, Model, Wm, Wi, Step }
Wherein, X, Y, Z represent the position of camera in three dimensions, are arbitrary number；Model represents camera mode, can set
It is set to orthogonal modes, perspective mode；WmTo go out space actual size representated by figure range, for the number greater than 0, WiFor the figure for going out figure
As pixel size, for the integer greater than 0；Step is the distance that camera moves every time, for the number greater than 0；
Step S33, the range D that an energy includes all construction project models is set, is indicated are as follows:
D { Xmin, Ymin, Xmax, Ymax }
Wherein: Xmin indicates that minimum lateral coordinate, Ymin indicate that minimum longitudinal coordinate, Xmax indicate maximum transversal coordinate,
Ymax indicates maximum longitudinal coordinate；To simplify the calculation, Xmin, Ymin, Xmax, Ymax take the integral multiple of Step；
Step S34, within the scope of D, construction project model texture is obtained according to Step, range D is divided into N number of unit
Lattice, each cell length and width is Step, is indicated are as follows:
N { X, Y }
Wherein, X, Y indicate the center position of cell；N is the integer not less than 1；
Successively camera position is obtained using orthogonal modes in position { X, Y } where cell N and saves current scene
Screenshot IMGxy, while being calculated according to camera information and saving screenshot IMGxyThe corresponding spatial positional information FW in cornerxy, indicate are as follows:
FWxy{XL、YT, XR, YB}
Wherein, XLIndicate lateral coordinates on the left of image, YTIndicate longitudinal coordinate on the upside of image, XRIt indicates on the right side of image laterally
Coordinate, YBIndicate longitudinal coordinate on the downside of image；According to the definition of PC, XL=X-Wm/2, YT=Y+Wm/2, XR=X+Wm/2, YB=Y
+Wm/2；
Step S35, the step S34 image obtained is spliced using GIS software, and its coordinate is converted into open number
The coordinate system used according to resource；
Step S36, using the image mosaic function of GIS software, by construction project threedimensional model truncated picture and openly
The a wide range of image data obtained is inlayed, the image IMG_R after being inlayed.
In the technical scheme, it provides the associated texture of the construction project threedimensional model and the open big model obtained
Enclose the specific method that image data is inlayed.By the range D division unit lattice of construction project model, and each cell is embedding
The a wide range of image for packing into open acquisition, improves the display precision of model in the range D of construction project model.Meanwhile it will build
The coordinate of engineering model is converted to the open coordinate system that public data uses, and improves the confidentiality of model.
Furthermore, the step S4 is included: and is melted DEM_R and IMG_R using digital terrain processing software
It closes, obtains finally needing what is shown to contain the digital terrain model of construction project threedimensional model.
In the technical scheme, digital elevation model and texture are merged, forms digital terrain model.It will be digital high
The data texturing deconsolidation process of journey model data and threedimensional model effectively improves model treatment speed, meanwhile, it is also convenient for model pipe
Reason.
The beneficial effects of the present invention are: the present invention is by using the retrievable geography information in internet as background, to build work
Journey subtle three-dimensional model is to show object, formed by the fusion of the two meet national privacy policy requirement can be on the internet
Spectacular achievement realizes the online three-dimensional display of construction project.The present invention using can disclose obtain geography information as data source,
It in conjunction with construction project three-dimensional simulation technology, is merged by digital elevation model, realizes that high-precision engineering information and low precision are geographical
Information effectively integrates, and achievees the purpose that construction project is shown online, solves the geography information under current national privacy policy
Internet application is limited, construction project shows the problems such as gimmick is single on the net, mentions for current urban and rural planning, design and construction project
An effective solution is proposed for abundant, online geographic information services, is the high accuracy data service of enterprise
Technical support is provided with demands such as planning and designing achievement spatial visualizations.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
As shown in Figure 1, in the first embodiment of the invention, providing a kind of online three-dimensional visualization side of construction project model
Method, comprising the following steps:
Step S1, application and construction engineering design achievement carries out the three-dimensional simulation based on high-precision landform: in high-precision three-dimensional
On the basis of landform, application and construction engineering design achievement is modeled using 3 d modeling software by hand or using three-dimensional Computer Aided Design
System constructs construction project threedimensional model；
Step S2, by the Conversion of Spatial Data of the construction project threedimensional model at high accuracy number elevation model, and with
The open a wide range of low Accuracy Figure elevation model data obtained is merged；
Step S3, the associated texture of the construction project threedimensional model and the open a wide range of image data obtained are carried out
It inlays；
Step S4, the image based on fused digital elevation model and after inlaying creates digital terrain model, obtains height
The visual construction project threedimensional model of precision.
It is noted that the open a wide range of image obtained can be Baidu map, Google in step S3 of the present invention
Map, Amap, can also be with electronic map disclosed in government department or paper map, and being also possible to other forms allows disclosure
Open geographic information resources.It is obtained in addition, can disclose: referring generally to satellite image disclosed, that the big precision of range is low, digitally
Shape model, Thematic maps etc..National privacy policy: according to security stipulation, greater than the geographical resource of a certain range and precision
Belong to confidential information, can only be used in the environment of meeting security requirements, internet can not be used for.
In the present embodiment, step S2 includes:
Step S21, the spatial data of the construction project threedimensional model is separated, obtains multiple continuous spatial modes
Type indicates are as follows:
CMS{CM1, CM2..., CMn}
Wherein, each CMiRepresent spatially continuous threedimensional model segment；
Step S22, to each construction project threedimensional model segment CMi, extract each threedimensional model segment letter in model
T is ceased, the data format CMF with elevation information that can be identified by GIS software is converted intoi；
Step S23, to each CMFi, digital complex demodulation _ CM is converted into using GIS software；And guarantee digital elevation
The precision of model DEM_CM can embody the spatial detail of construction project；
Step S24, to the DEM_CM after conversion, its coordinate is converted to what public data resource used using GIS software
Coordinate system；
Step S25, it to the open a wide range of low Accuracy Figure elevation model obtained, is handled using GIS software, makes it
Precision is consistent with DEM_CM precision, the digital complex demodulation _ NET that obtains that treated；
Step S26, DEM_CM and DEM_NET are merged using GIS software, obtains fused digital elevation model
DEM_R。
In the present embodiment step S26, if the digital complex demodulation _ CM and digital complex demodulation _ NET
There are overlapping regions, then take the height value of the digital complex demodulation _ CM as the fused digital elevation model
The height value of DEM_R；White space if it exists then fills corresponding height value using mean difference method.
In the present embodiment, step S3 includes:
Step S31, under three-dimensional display mode, camera lens are set to vertically downward；
Step S32, a camera information PC is set, is indicated are as follows:
PC { X, Y, Z, Model, Wm, Wi, Step }
Wherein, X, Y, Z represent the position of camera in three dimensions, are arbitrary number；Model represents camera mode, can set
It is set to orthogonal modes, perspective mode；WmTo go out space actual size representated by figure range, for the number greater than 0, WiFor the figure for going out figure
As pixel size, for the integer greater than 0；Step is the distance that camera moves every time, for the number greater than 0；
Step S33, the range D that an energy includes all construction project models is set, is indicated are as follows:
D { Xmin, Ymin, Xmax, Ymax }
Wherein: Xmin indicates that minimum lateral coordinate, Ymin indicate that minimum longitudinal coordinate, Xmax indicate maximum transversal coordinate,
Ymax indicates maximum longitudinal coordinate；To simplify the calculation, Xmin, Ymin, Xmax, Ymax take the integral multiple of Step；
Step S34, within the scope of D, construction project model texture is obtained according to Step, range D is divided into N number of unit
Lattice, each cell length and width is Step, is indicated are as follows:
N { X, Y }
Wherein, X, Y indicate the center position of cell；N is the integer not less than 1；
Successively camera position is obtained using orthogonal modes in position { X, Y } where cell N and saves current scene
Screenshot IMGxy, while being calculated according to camera information and saving screenshot IMGxyThe corresponding spatial positional information FW in cornerxy, indicate are as follows:
FWxy{XL、YT, XR, YB}
Wherein, XLIndicate lateral coordinates on the left of image, YTIndicate longitudinal coordinate on the upside of image, XRIt indicates on the right side of image laterally
Coordinate, YBIndicate longitudinal coordinate on the downside of image；According to the definition of PC, XL=X-Wm/2, YT=Y+Wm/2, XR=X+Wm/2, YB=Y
+Wm/2；
Step S35, the step S34 image obtained is spliced using GIS software, and its coordinate is converted into open number
The coordinate system used according to resource；
Step S36, using the image mosaic function of GIS software, by construction project threedimensional model truncated picture and openly
The a wide range of image data obtained is inlayed, the image IMG_R after being inlayed.
In the present embodiment, step S4 is included: and is merged DEM_R and IMG_R using digital terrain processing software,
It obtains finally needing what is shown to contain the digital terrain model of construction project threedimensional model.It is noted that utilizing number
Elevation model (DEM) and image superposition generate digital terrain model, and current most of three-dimensional geographic information softwares all provide
Basic function, this only one condition of superposition: coordinate system is identical.Additive process includes: load DEM, image is loaded, in three-dimensional
Image, which is attached on DEM, in software (using coordinate, can calculate square four coordinates of grid of each of DEM, then
Image is cut, corresponding small pieces image is obtained, then this small pieces image is attached in the grid of DEM, this process
With using 3Ds Max progress, modeling is by hand.The technology is the prior art, and which is not described herein again.
In addition, the fusion of digital elevation model, image inlay and using digital elevation and image superposition generate digitally
Shape model is existing mature technology, and which is not described herein again.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (4)
1. a kind of online three-dimensional visualization method of construction project model, which comprises the following steps:
Step S1, application and construction engineering design achievement carries out the three-dimensional simulation based on high-precision landform: in high-precision three-dimensional landform
On the basis of, application and construction engineering design achievement is modeled using 3 d modeling software by hand or using three-dimensional aided design system
Construct construction project threedimensional model；
Step S2, by the Conversion of Spatial Data of the construction project threedimensional model at high accuracy number elevation model, and with openly
The a wide range of low Accuracy Figure elevation model data obtained is merged；
Step S3, the associated texture of the construction project threedimensional model and the open a wide range of image data obtained are inlayed
It is embedding；
Step S4, the image based on fused digital elevation model and after inlaying creates digital terrain model, obtains high-precision
Visual construction project threedimensional model；
The step S2 includes:
Step S21, the spatial data of the construction project threedimensional model is separated, obtains multiple continuous spatial models,
It indicates are as follows:
CMS{CM1, CM2..., CMn}
Wherein, each CMiRepresent spatially continuous threedimensional model segment；
Step S22, to each construction project threedimensional model segment CMi, each threedimensional model clip information T in model is extracted, is turned
Change the data format CMF with elevation information that can be identified by GIS software intoi；
Step S23, to each CMFi, digital complex demodulation _ CM is converted into using GIS software；
Step S24, to the DEM_CM after conversion, its coordinate is converted into the coordinate that public data resource uses using GIS software
System；
Step S25, it to the open a wide range of low Accuracy Figure elevation model obtained, is handled using GIS software, makes its precision
It is consistent with DEM_CM precision, the digital complex demodulation _ NET that obtains that treated；
Step S26, DEM_CM and DEM_NET are merged using GIS software, obtain fused digital complex demodulation _
R。
2. a kind of online three-dimensional visualization method of construction project model as described in claim 1, it is characterised in that: in the step
In rapid S26, if there are overlapping regions by the digital complex demodulation _ CM and the digital complex demodulation _ NET, institute is taken
State height value of digital complex demodulation _ CM height value as the fused digital complex demodulation _ R；If it exists
White space then fills corresponding height value using mean difference method.
3. a kind of online three-dimensional visualization method of construction project model as described in claim 1, which is characterized in that the step
S3 includes:
Step S31, under three-dimensional display mode, camera lens are set to vertically downward；
Step S32, a camera information PC is set, is indicated are as follows:
PC { X, Y, Z, Model, Wm, Wi, Step }
Wherein, X, Y, Z represent the position of camera in three dimensions, are arbitrary number；Model represents camera mode, and setting is positive
Friendship mode or perspective mode；WmTo go out space actual size representated by figure range, for the number greater than 0, WiFor the image pixel for going out figure
Size, for the integer greater than 0；Step is the distance that camera moves every time, for the number greater than 0；
Step S33, the range D that an energy includes all construction project models is set, is indicated are as follows:
D { Xmin, Ymin, Xmax, Ymax }
Wherein: Xmin indicates that minimum lateral coordinate, Ymin indicate that minimum longitudinal coordinate, Xmax indicate maximum transversal coordinate, Ymax
Indicate maximum longitudinal coordinate；
Step S34, within the scope of D, construction project model texture is obtained according to Step and range D is divided into N number of cell, often
A cell length and width is Step, is indicated are as follows:
N { X, Y }
Wherein, X, Y indicate the center position of cell；N is the integer not less than 1；
Successively camera position is obtained using orthogonal modes in position { X, Y } where cell N and saves current scene screenshot
IMGxy, while being calculated according to camera information and saving screenshot IMGxyThe corresponding spatial positional information FW in cornerxy, indicate are as follows:
FWxy{XL、YT, XR, YB}
Wherein, XLIndicate lateral coordinates on the left of image, YTIndicate longitudinal coordinate on the upside of image, XRIndicate lateral coordinates on the right side of image,
YBIndicate longitudinal coordinate on the downside of image；According to the definition of PC, XL=X-Wm/2, YT=Y+Wm/2, XR=X+Wm/2, YB=Y+Wm/
2；
Step S35, the step S34 image obtained is spliced using GIS software, and its coordinate is converted into public data money
The coordinate system that source uses；
Step S36, using the image mosaic function of GIS software, by construction project threedimensional model truncated picture and open acquisition
A wide range of image data inlayed, the image IMG_R after being inlayed.
4. a kind of online three-dimensional visualization method of construction project model as claimed in claim 3, which is characterized in that the step
S4 includes: to be merged DEM_R and IMG_R using digital terrain processing software, and containing for obtaining finally needing to show is built
If the digital terrain model of engineering threedimensional model.
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| CN107292954B (en) * | 2017-06-21 | 2020-12-15 | 重庆市勘测院 | Three-dimensional model and photo fusion method |
| CN107992702B (en) * | 2017-12-15 | 2021-02-05 | 河南省水利勘测设计研究有限公司 | Method for converting various BIM model data into DEM data |
| CN111192366B (en) * | 2019-12-30 | 2023-04-07 | 重庆市勘测院 | Method and device for three-dimensional control of building height and server |
| CN114241142B (en) * | 2021-11-23 | 2022-10-14 | 北京国网富达科技发展有限责任公司 | Multi-precision DEM data difference value smooth fusion method and system |
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