CN105989198B - Highway parametrization method for automatic modeling and system based on BIM - Google Patents

Highway parametrization method for automatic modeling and system based on BIM Download PDF

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CN105989198B
CN105989198B CN201510047670.3A CN201510047670A CN105989198B CN 105989198 B CN105989198 B CN 105989198B CN 201510047670 A CN201510047670 A CN 201510047670A CN 105989198 B CN105989198 B CN 105989198B
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highway
component
threedimensional
data
modeling
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CN201510047670.3A
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CN105989198A (en
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于洪武
郭力
袁卓亚
陈志超
龚晓晖
秦涛
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中交宇科(北京)空间信息技术有限公司
中国交通建设股份有限公司西北分公司
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Abstract

The embodiment of the present invention provides a kind of highway parametrization method for automatic modeling and system based on BIM.This method comprises: establishing terrain scene model using image data and Law of DEM Data;Highway structure is decomposed into multiple components, obtains the design data of each component;Modular modeling is carried out to each component according to the design data of each component, obtains corresponding model of element;The corresponding model of element of each component is assembled according to preset highway construction specification, obtains highway threedimensional model;Highway threedimensional model is merged with terrain scene model by preset algorithm, obtains the true threedimensional model of fused highway;Model of element in the true threedimensional model of highway is associated and is shown with attribute information.The embodiment of the present invention also provides a kind of highway parametrization automatic modeling system based on BIM.This method and system can realize highway automation modeling, improve modeling efficiency, and provide 3 D stereo display effect true to nature.

Description

Highway parametrization method for automatic modeling and system based on BIM
Technical field
The present invention relates to highway dimensional Modeling Technologies more particularly to a kind of highway based on BIM to parameterize automatic modeling side Method and system.
Background technique
Building Information Model (Building Information Modeling, abbreviation BIM) technology is with architectural engineering item Basis of the purpose items relevant information data as model, carries out the foundation of buildings model.BIM covers geometry, space is closed System, GIS-Geographic Information System (Geographic Information System, abbreviation GIS), the property of various construction sets and number Amount.BIM can be used to show whole building life cycle, include construction process and operation process, extract material in building Information is very convenient.Various pieces, each system can show in building.
In recent years, China's communication develops rapidly, and highway is even more to enter the great-leap-forward development stage.With highway and railway The continuous quickening of construction, designs it, more stringent requirements are proposed for construction and operation management.Highway three-dimensional visualization technique handle Design informations and the topography and geomorphologies such as highway is flat, vertical, horizontal, the information such as landscape are combined together along the line, with the side of three-dimensional visualization Formula is visual in image to be expressed, so that information required for obtaining observer fast and accurately, improves production efficiency.
There are problems that following two during traditional three-dimensional modeling: non-automated when due to three-dimensional modeling leads to model Update it is difficult, once therefore model need to change and can only model again, efficiency is lower;And it is difficult to highway is realistically presented and build Effect and route after are passed through the landform in region, geomorphological environment.
How currently, application of the BIM technology in highway modeling is also seldom, therefore highway is solved using BIM technology and modeled When the existing above problem, be problem to be solved of the present invention.
Summary of the invention
The embodiment of the present invention provides a kind of highway parametrization method for automatic modeling and system based on BIM, to realize certainly Dynamicization modeling improves modeling efficiency, and provides 3 D stereo display effect true to nature, to present after true highway builds up Effect and route are passed through the landform in region, geomorphological environment.
On the one hand the embodiment of the present invention provides a kind of highway parametrization method for automatic modeling based on BIM, comprising:
Terrain scene model is established using image data and Law of DEM Data;
Highway structure is decomposed into multiple components, obtains the design data of each component;
Modular modeling is carried out to each component according to the design data of each component, obtains the corresponding unit of each component Model;
The corresponding model of element of each component is assembled according to preset highway construction specification, obtains highway three-dimensional mould Type;
The highway threedimensional model is merged with the terrain scene model by preset algorithm, is obtained fused The true threedimensional model of highway;
By the mark of each component, by the attribute information of each component in the true threedimensional model of the highway and the component Corresponding model of element is associated;
The true threedimensional model of the highway is shown by three-dimensional GIS platform.
On the other hand the embodiment of the present invention also provides a kind of highway parametrization automatic modeling system based on BIM, comprising:
Terrain modeling module, for establishing terrain scene model using image data and Law of DEM Data;
Parameter extraction module obtains the design data of each component for highway structure to be decomposed into multiple components;
Automatic modeling module is obtained for carrying out modular modeling to each component according to the design data of each component The corresponding model of element of each component;
The automatic modeling module is also used to the corresponding model of element of each component according to preset highway construction specification It is assembled, obtains highway threedimensional model;
Fusion Module, for being melted the highway threedimensional model and the terrain scene model by preset algorithm It closes, obtains the true threedimensional model of fused highway;
Relating module, for the mark by each component, by the category of each component in the true threedimensional model of the highway Property information model of element corresponding with the component is associated;
Three-dimensional visualization module, for showing the true threedimensional model of the highway by three-dimensional GIS platform.
Highway parametrization method for automatic modeling and system provided in an embodiment of the present invention based on BIM, by highway structure point Solution is multiple components, and obtains the design data of each component, is then built according to the design data of each component for all parts Corresponding model of element is found, then the corresponding model of element of each component is assembled, highway threedimensional model can be obtained, finally Highway threedimensional model merge with terrain scene model, the true threedimensional model of highway can be obtained, it will be in the true threedimensional model of highway Model of element it is associated with attribute information and be shown, can be realized automation modeling, improve modeling efficiency, and can 3 D stereo display effect true to nature is provided, be presented the effect after true highway is built up and route pass through region landform, Geomorphological environment, moreover it is possible to realize the interoperability between highway structure and attribute information, the Visual Implementation bidirectional inquiry and index.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for this For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other Attached drawing.
Fig. 1 is a kind of flow chart of highway parametrization method for automatic modeling based on BIM provided in an embodiment of the present invention;
Fig. 2 is a kind of flow chart of highway parametrization method for automatic modeling based on BIM provided in an embodiment of the present invention;
Fig. 3 is a kind of structural block diagram of highway parametrization automatic modeling system based on BIM provided in an embodiment of the present invention;
Fig. 4 is a kind of structural block diagram of highway parametrization automatic modeling system based on BIM provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
On the one hand the embodiment of the present invention provides a kind of highway parametrization method for automatic modeling based on BIM, as shown in Figure 1, The method of the embodiment of the present invention the following steps are included:
Step 101: establishing terrain scene model using image data and Law of DEM Data.
Step 102: highway structure being decomposed into multiple components, obtains the design data of each component.Wherein, it should be appreciated that Component can be the structures of highway, can also be a part of structures, structures may include road surface, roadbed, bridge, intercommunication Grade separation, culvert, protection works and auxiliary highway facilities etc..
Step 103: modular modeling being carried out to each component according to the design data of each component, obtains each component pair The model of element answered.
Step 104: the corresponding model of element of each component being assembled according to preset highway construction specification, obtains public affairs Road threedimensional model.
Step 105: highway threedimensional model being merged with terrain scene model by preset algorithm, is obtained fused The true threedimensional model of highway.
Step 106: by the mark of each component, by the attribute information of each component in the true threedimensional model of highway and being somebody's turn to do The corresponding model of element of component is associated.
Step 107: the true threedimensional model of highway is shown by three-dimensional GIS platform.
Wherein, what step 101 and step 102~step 104 were not fixed executes sequence, and step is executed before step 105 Rapid 101.
Highway provided in an embodiment of the present invention based on BIM parameterizes method for automatic modeling, highway structure is decomposed into more A component, and the design data of each component is obtained, it is then that all parts establish correspondence according to the design data of each component Model of element, then the corresponding model of element of each component is assembled, highway threedimensional model can be obtained, finally by highway Threedimensional model, which merge with terrain scene model, can be obtained the true threedimensional model of highway, by the unit in the true threedimensional model of highway Model is associated with attribute information and is shown, it is seen then that this method is with all parts (the one of structures or structures of highway Part) it is engineering entity unit, realize the three-dimensional parameterized automatic modeling of highway based on BIM, generating process is simple, workload Quickly, levels of precision is high, therefore can be realized automation modeling for smaller, generation, improves modeling efficiency, and be capable of providing true to nature 3 D stereo display effect, to be presented the effect after true highway is built up and route is passed through the landform in region, geomorphological environment, The interoperability being also able to achieve between highway structure and attribute information, the Visual Implementation bidirectional inquiry and index, so complete in highway Each stage application value of life cycle is all very big, and model is also more accurate.Therefore, in conclusion the embodiment of the present invention Modeling efficiency not only can be improved in the method for offer, shortens the modeling time, especially to the construction of highway, maintenance, operation, safety evaluation Etc. having established data basis, there is irreplaceable significance.
In order to enable those skilled in the art to be more clearly understood that technical solution provided in an embodiment of the present invention, lead to below Specific embodiment is crossed, the highway parametrization method for automatic modeling based on BIM that the embodiment of the present invention provides is carried out detailed Illustrate, as shown in Fig. 2, this method comprises:
Step 201: establishing terrain scene model using image data and Law of DEM Data.
Wherein, Law of DEM Data (Digital Elevation Model, vehicle economy M) is one by certain knot The data group that structure organizes together represents the spatial distribution of features of terrain;Further, spatial distribution is by plane coordinates system The formed space three-dimensional data of elevation (Z) of ground point in (X, Y) and each plane coordinates system, that is to say, that DEM is ground The numeral expression that shape rises and falls, by coordinate data to obtained one group of three-dimensional data (x, y, z) of landform surface area and right Topographical surface provides the algorithm composition continuously described.Image data can be multiresolution satellite-remote-sensing image and other kinds shadow Picture.
Illustratively, image data and dem data can have multi-layer, and the image data of multi-layer is in image resolution Upper difference;The image data of highest level can clearly distinguish the environmental information on highway periphery.By by image data and DEM Data investigation can establish whole terrain scene model, realize visual basic effect.It is corrected simultaneously using dem data The image data of multi-layer.Illustratively, multistage pyramid is constructed using multi-layer image data, and according to point-to-point texture Mapping is matched with the dem data of multi-layer, establishes whole model of place, actual display topography and geomorphology and environment.
Optionally, the foundation of digital orthophoto map (Digital Orthophoto Map, abbreviation DOM) data can also be used Terrain scene model, DOM are to the digitized airphoto or high resolution ratio satellite remote-sensing image data after scan process Production forms image data described in the embodiment of the present invention, after carrying out geometric correction by pixel and inlaying, high with precision, Abundant information, intuitive true feature, while being the image with map geometric accuracy and image feature.
Optionally, digital raster map data can also be used or digital line draws map datum etc. and establishes terrain scene model.
Step 202: highway structure being decomposed into multiple components, obtains the design data of each component.
It illustratively, firstly, can be practical public by the design during highway construction, construction drawing, friendship completion information, scene Highway structure is pressed work breakdown structure (Work Breakdown as data source by road investigation or navigation data Structure, abbreviation WBS) it is divided into multiple components, wherein each component can be road surface, roadbed, bridge, interchange, culvert One of hole, protection works and auxiliary highway facilities structures are also possible to a part of aforementioned any structures.Its In, auxiliary highway facilities mainly includes that pumping equipment relevant with highway, safety devices, protective equipment, monitor and control facility, communication are set It applies, toll facility, greening installation, service facility, handling facility, lighting installation, fire fighting device, ventilation equipment, ferry harbour, hand over Pitch road junction, nursery vegetable plot, boundary marker, pile, milestone, boundary tablet etc..
Secondly, obtaining the design data of each component, design data includes the connection of the three-dimensional coordinate and point and point of each point Relationship.
Optionally, first data source directly can be stored into database, then data source is divided by work breakdown structure Multiple components obtain the design data of each component.
It optionally, can also be after the design data for obtaining each component, in the database by design data storage.
Optionally, design data can be obtained by the highway coordinate of pile by pile table of comparisons.Specifically, first determining each pile No. point of highway Accurate three-dimensional coordinate, then will according to the three-dimensional coordinate determine other design datas three-dimensional coordinate by unified standard format, It is entered into database.
Optionally, design data can also the different-format made of other modeling softwares of interface modelling number According to.The interface is divided into two classes: one kind is generated for receiving conventional road design software (such as latitude, CARD/1 design software) Road Design parameter, can automatically extract and decompose highway modeling parameters by this kind of interface, obtain design data and simultaneously store In the database;It is another kind of be for being compatible with different 3D model formats, since model is made of other non-traditional modeling softwares, It therefore can include different model formats: such as DWG format vector data, TIF format image data, Shp format vector data, emerging Interest point POI data, 3DS model data etc., the highway structures design data of different-format can be imported by such interface.
Wherein, DWG formatted data is topographic map vector data derived from AUTOCAD;TIF format is the data of remote sensing image One kind of format;Shp formatted data is geologic map vector data derived from ARCGIS;Point of interest POI is the interested point of user, Point of interest POI data includes all relevant information of the point;3DS model data is three-dimensional model data, and file suffixes can be with For .x .xpl .skp .3ds etc..
Optionally, the identification information and other attribute informations of each component also be can get, and the mark of each component is believed Breath and attribute information store in the database correspondingly, and identification information and design data also have corresponding relationship.Wherein, Identification information can be pile No. or ID number.Wherein, pile No. is the position that those skilled in the art indicate specific region in engineering Mark.
Step 203: modular modeling being carried out to each component according to the design data of each component, obtains each component pair The model of element answered.
Optionally, when carrying out modular modeling, modeling structure dividing elements is carried out to each component, are with each component One engineering entity unit establishes BIM model by the design data of all parts, obtains the corresponding model of element of each component.
Illustratively, when the component for needing to model is road surface, firstly, the connection of three-dimensional coordinate and point and point by each point Relationship, it may be determined that the data such as plane, vertical section, the cross section on road surface obtain road center by panel data and longitudinal data The three-dimensional coordinate of arbitrary point on line.Then, by cross-section face data, each characteristic point putting down relative to Lu Zhizheng point on cross section is obtained Away from and height difference the coordinate and elevation of those characteristic points can be obtained after the coordinate and elevation for calculating Lu Zhizheng point;These features Point includes: Lu Zhizheng point on cross section, strip planting belt edge point, the interior outer point of driveway, in pavement outside Endpoint, the change point on side slope line, slope foot point, ground elevation change point of side slope two sides etc..Then, according to two neighboring cross-section Each characteristic point constructs polygon curved surface on face, forms the threedimensional model in each section in road surface.Finally, by the three-dimensional in each section Model connects, and different textures is mapped according to attribute information to different polygon facets, forms the list on whole road surface Meta-model.
It is similar to the modeling method on above-mentioned road surface for the modeling method of other kinds of component, it will not enumerate.
It optionally, can be also the every of auxiliary highway facilities by type after obtaining the corresponding model of element of each component The corresponding model of element of a component is stored in model library.The reuse for facilitating model, realizes resource-sharing, reduces number According to redundancy.In model library, when having the model of element of the auxiliary highway facilities of corresponding types, the public affairs of the type can be no longer carried out The modeling of road affiliated facility, calls directly, and has not only reduced the data redundancy in model library, but also shortens the modeling time.
Wherein, include texture searching in model library, greening library, affiliated facility library, hand over and pacify engineering library, bridges and culverts tunnel library etc..
Optionally, can also be by traffic engineering design drawing, or the practical highway surveillance in scene, obtaining is made on highway Other data informations such as type, quantity, position of auxiliary highway facilities construct single affiliated facility model;Or it utilizes 3DMAX or other modeling tools construct single affiliated facility model.Then, these models are stored in model library.
Optionally, it the edit operations such as can also be increased the model in model library, delete, modify, updating.And it can be with Independent model is automatically or semi-automatically added in highway threedimensional model along the mode that highway moves towards arrangement lot-size model.
Step 204: the corresponding model of element of each component being assembled according to preset highway construction specification, obtains public affairs Road threedimensional model.
Specifically, highway construction specification can be assembled according to the difference of road quality classification according to different standards.It is exemplary , locial join, the complete highway three of combination producing can be carried out according to the spatial relation between each component, construction time sequence Dimension module.
The corresponding model of element of each component can be model of element obtained in step 203, or come from model Model of element in library.
Step 205: highway threedimensional model is optimized, the optimization include: model face number optimization, Number of Models optimization and At least one of texture optimization.
Since the quantity in threedimensional model face decides the expression effect of model.Therefore, the quantity in face needed for three-dimensional modeling is got over More, the expression effect of modeling is finer and smoother, more close to true, and embodies optimal performance in order to reach with least model data and imitate The purpose of fruit, it is necessary to model data be optimized from various aspects such as Correctness of model, aesthetics and occupied spaces.
Illustratively, occupied space is stored to reduce model, mainly optimize in terms of following three: model face number is excellent Change, Number of Models optimizes and texture optimization.
Wherein, model face number optimization comprises at least one of the following: sightless face in highway threedimensional model is deleted or reduces, Delete or reduce the face intersected between component.
Illustratively, for sightless face in the deletion or reduction model composition in the optimization of model face number, light can be used Line tracing algorithm is reflected when light intersects with face from multiple angles to all face throw lights of model.It will using this algorithm Throw light and all faces carry out intersection operation, and in the case that light can not intersect with face reflected always, this face is not Visible face can be deleted.
Illustratively, for the deletion in the optimization of model face number or the face intersected between component is reduced, two intersections can be passed through The union operation in face fast implements.When there is intersection situation in the sideline in two faces, then take two faces all vertex and Sideline intersection point, and all points fallen in inside two faces are excluded, so that a face is merged into two faces, it is excellent to reach model face number The purpose of change.
Number of Models optimization includes: that the identical model of element of material is carried out batch merging.
Texture optimization comprises at least one of the following: unified specification is set by all texture mapping, to needing repeated application Texture mapping same texture mapping file is called under same file path.
Illustratively, for texture optimization, the optimization of texture mapping includes the optimization of the size and number of textures.It is not breaking Under the premise of the texture and clarity of bad textures, the size of textures can be unified within 256KB;When needing to particular texture weight When application again, the texture under same file path is called directly, to reduce the quantity of texture, to reach Optimized model Purpose.
Step 206: highway threedimensional model being merged with terrain scene model by preset algorithm, is obtained fused The true threedimensional model of highway.
Since highway and landform are inseparable entirety, therefore, it is necessary to which the model of highway is merged with relief model, To enhance the sense of reality that highway scene is shown.It illustratively, can be by the intersection point of calculating the model of highway and relief model, by this A little intersection points form closed curve, to draw a circle to approve impacted relief model range, carry out to impacted local relief model texture Blanking and cutting processing are formed fused to realize that highway solid threedimensional model is merged with the seamless of terrain scene model The true threedimensional model of highway.
Step 207: by the mark of each component, by the attribute information of each component in the true threedimensional model of highway and being somebody's turn to do The corresponding model of element of component is associated.
By the mark of each component, the attribute information of each component model of element corresponding with the component is closed The two-way index and the Visual Implementation bidirectional inquiry and index of the true threedimensional model of highway and its attribute information may be implemented in connection.
Optionally, the attribute information of each component can be the attribute information being stored in database, can also be to be stored in Attribute information in other information library.
Step 208: the true threedimensional model of highway is shown by three-dimensional GIS platform.
Optionally, it before any one step before step 201 also can tune to step 206, or holds simultaneously with any one step Row.
Highway provided in an embodiment of the present invention based on BIM parameterizes method for automatic modeling, highway structure is decomposed into more A component, and the design data of each component is obtained, it is then that all parts establish correspondence according to the design data of each component Model of element, then the corresponding model of element of each component is assembled, highway threedimensional model can be obtained, finally by highway Threedimensional model, which merge with terrain scene model, can be obtained the true threedimensional model of highway, by the unit in the true threedimensional model of highway Model is associated with attribute information and is shown, it is seen then that this method is realized using all parts of highway as engineering entity unit The three-dimensional parameterized automatic modeling of highway based on BIM, generating process is simple, workload is smaller, generation is quick, levels of precision Height, therefore can be realized automation modeling, modeling efficiency is improved, and be capable of providing 3 D stereo display effect true to nature, with It is presented the effect after true highway is built up and route is passed through the landform in region, geomorphological environment, moreover it is possible to realize highway structure and belong to Interoperability between property information, the Visual Implementation bidirectional inquiry and index, so each stage in highway Life cycle answers All very big with value, model is also more accurate.Therefore, in conclusion method provided in an embodiment of the present invention not only can be improved Modeling efficiency shortens the modeling time, has especially established data basis to the construction of highway, maintenance, operation, safety evaluation etc., has There is irreplaceable significance.
On the other hand the embodiment of the present invention also provides a kind of highway parametrization automatic modeling system based on BIM.Fig. 3 is this A kind of structural block diagram of the highway parametrization automatic modeling system based on BIM provided by inventive embodiments, as shown in figure 3, should Automatic modeling service system includes: terrain modeling module 31, parameter extraction module 32, automatic modeling module 33, Fusion Module 34, Relating module 35, three-dimensional visualization module 36.
Terrain modeling module 31, for establishing terrain scene model using image data and Law of DEM Data.
Parameter extraction module 32 obtains the design data of each component for highway structure to be decomposed into multiple components.
Automatic modeling module 33 carries out modular modeling to each component according to the design data of each component, obtains every The corresponding model of element of a component.Wherein, the automatic modeling module 34, being also used to will be each according to preset highway construction specification The corresponding model of element of component is assembled, and highway threedimensional model is obtained.
Fusion Module 34 is obtained for being merged highway threedimensional model with terrain scene model by preset algorithm The fused true threedimensional model of highway.
Relating module 35, for the mark by each component, by the attribute of each component in the true threedimensional model of highway Information model of element corresponding with the component is associated;
Three-dimensional visualization module 36, for showing the true threedimensional model of highway by three-dimensional geographic information system platform Show.
Optionally, as shown in figure 4, the automatic modeling system further include: model optimization module 37.The model optimization module 37 For being carried out to highway threedimensional model before being merged highway threedimensional model with terrain scene model by preset algorithm Optimization, optimization include: at least one of the optimization of model face number, Number of Models optimization and texture optimization.
Wherein, model face number optimization comprises at least one of the following: sightless face in highway threedimensional model is deleted or reduces, Delete or reduce the face intersected between component;Number of Models optimization includes: that the identical model of element of material is carried out batch merging; Texture optimization comprises at least one of the following: setting unified specification for all texture mapping, pastes to the texture for needing repeated application Figure calls same texture mapping file under same file path.
Optionally, automatic modeling system further includes model library, automatic modeling module 33 also particularly useful for:
Modular modeling is being carried out to each component according to the design data of each component, is obtaining the corresponding list of each component After meta-model, the corresponding model of element of each component that type is auxiliary highway facilities is stored in model library.
Optionally, automatic modeling system further includes database, and parameter extraction module is specifically used for each component Design data stores in the database.Optionally, parameter extraction module can also first store all data sources in the database, The design data of each component is obtained again.
Highway provided in an embodiment of the present invention based on BIM parameterizes automatic modeling system, highway structure is decomposed into more A component, and the design data of each component is obtained, it is then that all parts establish correspondence according to the design data of each component Model of element, then the corresponding model of element of each component is assembled, highway threedimensional model can be obtained, finally by highway Threedimensional model, which merge with terrain scene model, can be obtained the true threedimensional model of highway, by the unit in the true threedimensional model of highway Model is associated with attribute information and is shown, it is seen then that this method is realized using all parts of highway as engineering entity unit The three-dimensional parameterized automatic modeling of highway based on BIM, generating process is simple, workload is smaller, generation is quick, levels of precision Height, therefore can be realized automation modeling, modeling efficiency is improved, and be capable of providing 3 D stereo display effect true to nature, with It is presented the effect after true highway is built up and route is passed through the landform in region, geomorphological environment, moreover it is possible to realize highway structure and belong to Interoperability between property information, the Visual Implementation bidirectional inquiry and index, so each stage in highway Life cycle answers All very big with value, model is also more accurate.Therefore, in conclusion method provided in an embodiment of the present invention not only can be improved Modeling efficiency shortens the modeling time, has especially established data basis to the construction of highway, maintenance, operation, safety evaluation etc., has There is irreplaceable significance.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey When being executed, execution includes the steps that above-mentioned each method embodiment to sequence;And storage medium above-mentioned include: ROM, RAM, magnetic disk or The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement;And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of highway based on Building Information Model BIM parameterizes method for automatic modeling characterized by comprising
By image data and Law of DEM Data hierarchical be superimposed in the way of establish terrain scene model;
Highway structure is decomposed into multiple components, obtains the design data of each component;
Modular modeling is carried out to each component according to the design data of each component, obtains the corresponding unit mould of each component Type;
The corresponding model of element of each component is assembled according to preset highway construction specification, obtains highway threedimensional model;
The highway threedimensional model is merged with the terrain scene model by preset algorithm, obtains fused highway True threedimensional model;
It is by the mark of each component, the attribute information of each component in the true threedimensional model of the highway is corresponding with the component Model of element be associated, realize highway true threedimensional model and attribute information two-way index;
The true threedimensional model of the highway is shown by three-dimensional geographic information system platform;
It is described by image data and Law of DEM Data hierarchical be superimposed in the way of establish terrain scene model, comprising:
The image data of multi-layer is corrected using Law of DEM Data;
Multistage pyramid is constructed using multi-layer image data, and according to the digital elevation of point-to-point texture mapping and multi-layer Model data is matched, and terrain scene model is established;
It is described to be merged the highway threedimensional model with the terrain scene model by preset algorithm, comprising:
The intersection point for calculating the highway threedimensional model Yu the terrain scene model forms closed curve by the intersection point with determination The range of impacted terrain scene model;
Blanking and cutting processing are carried out to the texture of the impacted terrain scene model, to realize the highway three-dimensional mould Type is merged with the seamless of terrain scene model.
2. the method according to claim 1, wherein it is described by preset algorithm by the highway threedimensional model Before being merged with the terrain scene model, the method also includes:
The highway threedimensional model is optimized, the optimization includes: that the optimization of model face number, Number of Models optimization and texture are excellent At least one of change.
3. according to the method described in claim 2, it is characterized in that,
Number optimization in the model face comprises at least one of the following: sightless face in the highway threedimensional model is deleted or reduces, Delete or reduce the face intersected between component;
The Number of Models optimization includes: that the identical model of element of material is carried out batch merging;
The texture optimization comprises at least one of the following: unified specification is set by all texture mapping, to needing repeated application Texture mapping same texture mapping file is called under same file path.
4. the method according to claim 1, wherein the type of the multiple component includes road surface, roadbed, bridge Beam, interchange, culvert, protection works and auxiliary highway facilities, in the design data according to each component to each portion Part carries out modular modeling, after obtaining the corresponding model of element of each component, further includes:
The corresponding model of element of each component that type is auxiliary highway facilities is stored in model library, with the weight of implementation model It is multiple to use;Model in the model library has increase, deletion, modification, more new function, and can be with independent model or along highway The mode for moving towards arrangement lot-size model is automatically or semi-automatically added in highway threedimensional model.
5. the method according to claim 1, wherein further including, in the database by design data storage.
6. a kind of highway based on Building Information Model BIM parameterizes automatic modeling system characterized by comprising
Terrain modeling module, for by image data and Law of DEM Data hierarchical superposition in the way of establish landform field Scape model;
Parameter extraction module obtains the design data of each component for highway structure to be decomposed into multiple components;
Automatic modeling module obtains each for carrying out modular modeling to each component according to the design data of each component The corresponding model of element of component;
The automatic modeling module is also used to carry out the corresponding model of element of each component according to preset highway construction specification Assembling, obtains highway threedimensional model;
Fusion Module is obtained for being merged the highway threedimensional model with the terrain scene model by preset algorithm To the true threedimensional model of fused highway;
Relating module believes the attribute of each component in the true threedimensional model of the highway for the mark by each component It ceases model of element corresponding with the component to be associated, realizes the two-way index of highway true threedimensional model and attribute information;
Three-dimensional visualization module, for showing the true threedimensional model of the highway by three-dimensional geographic information system platform;
The terrain modeling module is specifically used for, and the image data of multi-layer is corrected using Law of DEM Data;
Multistage pyramid is constructed using multi-layer image data, and according to the digital elevation of point-to-point texture mapping and multi-layer Model data is matched, and terrain scene model is established;
The Fusion Module is specifically used for, and the intersection point of the highway threedimensional model Yu the terrain scene model is calculated, by described Intersection point forms closed curve with the range of the impacted terrain scene model of determination;
Blanking and cutting processing are carried out to the texture of the impacted terrain scene model, to realize the highway three-dimensional mould Type is merged with the seamless of terrain scene model.
7. automatic modeling system according to claim 6, which is characterized in that the automatic modeling system further include:
Model optimization module, for it is described by preset algorithm by the highway threedimensional model and the terrain scene model into Before row fusion, the highway threedimensional model is optimized, the optimization includes: the optimization of model face number, Number of Models optimization At least one of with texture optimization.
8. automatic modeling system according to claim 7, which is characterized in that
Number optimization in the model face comprises at least one of the following: sightless face in the highway threedimensional model is deleted or reduces, Delete or reduce the face intersected between component;
The Number of Models optimization includes: that the identical model of element of material is carried out batch merging;
The texture optimization comprises at least one of the following: unified specification is set by all texture mapping, to needing repeated application Texture mapping same texture mapping file is called under same file path.
9. automatic modeling system according to claim 6, which is characterized in that the type of the multiple component include road surface, Roadbed, bridge, interchange, culvert, protection works and auxiliary highway facilities, the automatic modeling system further includes model library, The automatic modeling module also particularly useful for:
Modular modeling is carried out to each component in the design data according to each component, obtains the corresponding list of each component After meta-model, the corresponding model of element of each component that type is auxiliary highway facilities is stored in the model library, with The reuse of implementation model;Model in the model library has increase, deletion, modification, more new function, and can be with independence Model is automatically or semi-automatically added in highway threedimensional model along the mode that highway moves towards arrangement lot-size model.
10. automatic modeling system according to claim 6, which is characterized in that the automatic modeling system further include:
Memory module, for storing in the database the design data.
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