CN110232230B - Method and device for constructing three-dimensional model of road channel network containing bridge and culvert nodes - Google Patents
Method and device for constructing three-dimensional model of road channel network containing bridge and culvert nodes Download PDFInfo
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Abstract
The embodiment of the invention provides a method and a device for constructing a three-dimensional model of a road and channel network containing bridge and culvert nodes. The method comprises the following steps: acquiring road and channel network data to be modeled; the road and channel network at least comprises a first line and a second line, and the road and channel network data at least comprises a first central line of the first line, a second central line of the second line, a first section corresponding to the first central line, a second section corresponding to the second central line and a bridge node between the first central line and the second central line; and constructing a three-dimensional model of the road and channel network according to the road and channel network data. According to the method and the device provided by the embodiment of the invention, the bridge and culvert nodes, the central line and the cross section of each line in the road and channel network are used as the parameters for modeling, and the three-dimensional model of the road and channel network is constructed based on the parameters, so that the modeling efficiency and the accuracy are improved, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a method and a device for constructing a three-dimensional model of a road and channel network containing bridge and culvert nodes.
Background
The current ground feature is expressed into a three-dimensional model through a three-dimensional modeling technology, visual feedback is provided, and meanwhile, the three-dimensional model can be applied to the fields of map navigation, traffic planning and the like, so that a foundation is laid for map construction and traffic construction. However, at present, three-dimensional modeling of the present ground features is still a time-consuming, labor-consuming and costly task.
In the prior art, the regularized batch modeling is realized by parameterizing a description model, and the method is a main mode for reducing the modeling cost. For example, for an individual road or trench, the center line and the section of the road or trench can be used as parameters, and the section is lofted to the break point of the center line for batch modeling. However, for a road with a crossing or a ditch with a crossing, a bridge needs to be arranged at the crossing position of the road to maintain the connectivity of the road, and a culvert needs to be arranged at the crossing position of the ditch to maintain the connectivity of the ditch. Because the shape of the bridge and the canal is different, the bridge and the canal can not be directly modeled together with the canal, and the bridge and the canal are usually seamlessly spliced after being manually modeled independently.
However, the method for separately carrying out manual modeling on the bridges and culverts wastes time and labor and is high in cost, moreover, the model obtained by manual modeling and the road and canal model are seamlessly spliced, so that the modeling efficiency is greatly reduced, and meanwhile, complete seamless splicing is difficult to guarantee during splicing, so that the model accuracy is low.
Disclosure of Invention
The embodiment of the invention provides a method and a device for constructing a three-dimensional model of a road and channel network containing bridge and culvert nodes, which are used for solving the problems of low modeling efficiency, low accuracy and high cost in the conventional method for constructing the three-dimensional model of the road and channel network containing bridge and culvert nodes.
In a first aspect, an embodiment of the present invention provides a method for building a three-dimensional model of a road and canal network including bridge and culvert nodes, including:
acquiring road and channel network data to be modeled; the road and channel network at least comprises a first line and a second line, and the road and channel network data at least comprises a first central line of the first line, a second central line of the second line, a first section corresponding to the first central line, a second section corresponding to the second central line and a bridge node between the first central line and the second central line;
and constructing a three-dimensional model of the road and channel network according to the road and channel network data.
In a second aspect, an embodiment of the present invention provides a three-dimensional model building apparatus for a road and canal network including bridge and culvert nodes, including:
the data acquisition module is used for acquiring road and channel network data to be modeled; the road and channel network at least comprises a first line and a second line, and the road and channel network data at least comprises a first central line of the first line, a second central line of the second line, a first section corresponding to the first central line, a second section corresponding to the second central line and a bridge node between the first central line and the second central line;
and the model construction module is used for constructing a three-dimensional model of the road and channel network according to the road and channel network data.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method provided in the first aspect when executing the program.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first aspect.
According to the method and the device for constructing the three-dimensional model of the road and channel network comprising the bridge nodes, the center line and the cross section of each line in the road and channel network are used as the parameters for modeling, and the three-dimensional model of the road and channel network is constructed based on the parameters, so that the modeling efficiency and the accuracy are improved, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for constructing a three-dimensional model of a road and canal network including bridge and culvert nodes according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a center line and a bridge node in road and canal network data according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of road and channel network data provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a bridge section according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating determination of a bridge and culvert centerline according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a three-dimensional model building apparatus for a road and canal network including bridge and culvert nodes according to an embodiment of the present invention;
fig. 7 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a method for building a three-dimensional model of a road and canal network including bridge and culvert nodes according to an embodiment of the present invention, as shown in fig. 1, the method includes:
Specifically, the three-dimensional model of the road and channel network constructed by the embodiment of the invention can be applied to the fields of map navigation and traffic planning, and lays a foundation for constructing maps and traffic construction. For convenience of description, the two lines are respectively referred to as a first line and a second line, and the lines herein refer to roads or ditches. Because the first line and the second line in the road and trench network of the embodiment of the invention are crossed, but the road and the trench are not possible to be crossed, the first line and the second line in the road and trench network of the embodiment of the invention are both roads or both trenches. When the first line and the second line are both roads, bridges are arranged at the intersections of the roads, and when the first line and the second line are both ditches, culverts are arranged at the intersections of the roads.
To more clearly illustrate the solution of the embodiment of the present invention, the road and channel network X is selected as a network including only two lines, and both the first line and the second line are selected as roads, and the first line is referred to as a road 1 and the second line is referred to as a road 2. In order to construct a three-dimensional model of a road channel network X, an embodiment of the present invention obtains a three-dimensional model by a rod-lifting method, a level gauge tape-out method, a total station method, or a Real-time kinematic (RTK) carrier-phase differential technique: the first center line of the first line, namely the center line 1 of the road 1, the second center line of the second line, namely the center line 2 of the road 2, the first section corresponding to the first center line, namely the section 1 corresponding to the center line 1, the second section corresponding to the second center line, namely the section 2 corresponding to the center line 2, and the bridge and culvert node between the first center line and the second center line, namely the bridge and culvert node between the center line 1 and the center line 2.
Fig. 2 is a schematic diagram of a center line and a bridge node in road and channel network data according to an embodiment of the present invention, where the road and channel network is a road and channel network X, and fig. 2 shows a center line 1 of a road 1, a center line 2 of a road 2, and a bridge node between the center line 1 and the center line 2. It should be noted that the cross section 1 corresponding to the center line 1 and the cross section 2 corresponding to the center line 2 are not shown in fig. 2.
Fig. 3 is a schematic cross-sectional view of the road and channel network data according to an embodiment of the present invention, in which (a) is a schematic cross-sectional view corresponding to a center line of a road when the line is a road, and (b) is a schematic cross-sectional view corresponding to a center line of a channel when the line is a channel. (a) The section that part is illustrated is the trapezoidal section of narrow top down width, and the section includes following parameter: the upper opening is wide, the lower bottom is wide and the height is high; (b) The section that partly illustrates is the trapezoidal section of narrow down wide, and the section includes following parameter: upper mouth width, lower bottom width, height and lining thickness. In the road/channel network X, the section 1 corresponding to the center line 1 and the section 2 corresponding to the center line 2 are both sections indicated by the section (a).
And 102, constructing a three-dimensional model of the road and channel network according to the road and channel network data.
Specifically, for the road and channel network X, a three-dimensional model of the road and channel network X may be constructed according to a center line 1 of the road 1, a center line 2 of the road 2, a section 1 corresponding to the center line 1, a section 2 corresponding to the center line 2, and a bridge node between the center line 1 and the center line 2.
According to the method for constructing the three-dimensional model of the road and channel network containing the bridge and channel nodes, the bridge and channel nodes of all lines in the road and channel network, the center line and the cross section are used as the parameters for modeling, and the three-dimensional model of the road and channel network is constructed on the basis of the parameters, so that the modeling efficiency and accuracy are improved, and the cost is reduced.
Based on any one of the above embodiments, the embodiment of the present invention describes a process of modeling according to road and channel network data, that is, constructing a three-dimensional model of the road and channel network according to the road and channel network data, including:
step 1021, determining a first node on the first central line, determining a second node on the second central line, and connecting the first node and the second node to form a bridge and culvert central line.
Specifically, for the road and channel network X, a first node a is determined on the centerline 1 of the road 1, a second node B is determined on the centerline 2 of the road 2, and then the first node a and the second node B are connected to form a bridge center line.
And 1022, constructing a three-dimensional model of the road and channel network according to the first central line and the corresponding first cross section, the second central line and the corresponding second cross section, and the bridge and channel central line and the corresponding bridge and channel cross section and auxiliary cross section.
In particular, here, the parameters of the first and second cross-sections are identical.
Fig. 4 is a schematic diagram of a bridge section according to an embodiment of the present invention, as shown in fig. 4, (a) is a schematic diagram of a bridge section, and (b) is a schematic diagram of a culvert section, where parameters of the bridge section and the culvert section are described in detail in the diagram, and are not described again here. If the first section and the second section are both sections corresponding to the center line of the road, the bridge and culvert section is a bridge section, and at the moment, the width of the bridge section, namely the bridge width, is equal to the width of an upper opening of the first section; if the first section and the second section are both sections corresponding to the center line of the channel, the bridge and culvert section is specifically a culvert section, at the moment, the width of the upper opening of the culvert section is equal to that of the upper opening of the channel section, the width of the lower bottom of the culvert section is equal to that of the lower bottom of the channel section, and the height of the culvert section is equal to that of the channel section.
The auxiliary section is rectangular, the height of the auxiliary section is equal to that of the first section, and the width of the auxiliary section is twice of the maximum width of the first section. If the first cross section is a cross section corresponding to the center line of the road, the maximum width of the first cross section is the width of the bottom width; if the second section is the section corresponding to the central line of the trench, the maximum width of the first section is the width of the upper opening.
Based on any of the above embodiments, the embodiments of the present invention describe a process for determining a first node and a second node, that is, a distance from the first node to the bridge node is equal to a distance from the second node to the bridge node, and a calculation formula of the distance d is as follows:
wherein l is the length of the central line of the bridge and culvert, and alpha is the deflection angle of the first central line relative to the extension line of the second central line.
Specifically, fig. 5 is a schematic diagram of determining a bridge center line according to an embodiment of the present invention, and as shown in fig. 5, according to the above formula, a point on the first center line that is away from a bridge node d is determined as a first node a, a point on the second center line that is away from the bridge node d is determined as a second node B, and a connecting line between the first node a and the second node B is taken as the bridge center line.
Based on any of the above embodiments, the embodiment of the present invention describes step 1022 in the above embodiments, that is, constructing a three-dimensional model of the road and channel network according to the first centerline and the corresponding first cross section, the second centerline and the corresponding second cross section, and the bridge and culvert centerline and the corresponding bridge and culvert cross section and auxiliary cross section, includes:
constructing a first line model according to the first center line and the corresponding first section based on a TIN model construction method;
constructing a second line model according to the second center line and the corresponding second section based on a TIN model construction method;
constructing a bridge and culvert model according to the bridge and culvert central line and the corresponding bridge and culvert section based on a TIN model construction method;
constructing an auxiliary model according to the bridge and culvert center lines and the corresponding auxiliary sections based on a TIN model construction method;
and combining the first line model, the second line model, the bridge model and the auxiliary model to obtain a three-dimensional model of the road and channel network.
Specifically, the TIN model is an irregular triangulation network model, and by the TIN model construction method, a first line model can be constructed according to a first center line and a corresponding first section, a second line model can be constructed according to a second center line and a corresponding second section, a bridge and culvert model can be constructed according to a bridge and culvert center line and a corresponding bridge and culvert section, an auxiliary model can be constructed according to the bridge and culvert center line and a corresponding auxiliary section, and then the models are combined to obtain a three-dimensional model of the road and channel network. Wherein, the mode of combination includes: one or more of a model intersection operation, a model union operation, and a model difference operation.
Based on any of the above embodiments, the description of the specific combination process of the model in the embodiment of the present invention is that the three-dimensional model of the road and canal network is obtained by combining the first line model, the second line model, the bridge model, and the auxiliary model, and includes:
performing model difference operation on the first line model and the auxiliary model to obtain a new first line model;
performing model difference operation on the second line model and the auxiliary model to obtain a new second line model;
and carrying out model and operation on the new first line model, the new second line model and the bridge model to obtain a three-dimensional model of the road and channel network.
Based on any of the above embodiments, the first cross section and the second cross section are the same. The bridge and culvert section with first section matches, supplementary section is the rectangle, just supplementary sectional height with first sectional height is equal, supplementary sectional width is for the twice of first sectional maximum width.
In particular, the first and second cross sections being identical means that the parameters of the first and second cross sections are identical.
The matching of the culvert section and the first section means that if the first section and the second section are both sections corresponding to the central line of the road, the bridge culvert section is specifically a bridge section, and at the moment, the width of the bridge section is equal to the width of the upper opening of the first section; if the first section and the second section are both sections corresponding to the center line of the channel, the bridge and culvert section is specifically a culvert section, at the moment, the width of the upper opening of the culvert section is equal to that of the upper opening of the channel section, the width of the lower bottom of the culvert section is equal to that of the lower bottom of the channel section, and the height of the culvert section is equal to that of the channel section.
The auxiliary section is rectangular, the height of the auxiliary section is equal to that of the first section, and the width of the auxiliary section is twice of the maximum width of the first section. If the first cross section is a cross section corresponding to the center line of the road, the maximum width of the first cross section is the width of the bottom width; if the second section is the section corresponding to the central line of the trench, the maximum width of the first section is the width of the upper opening.
Based on any one of the above embodiments, fig. 6 is a schematic structural diagram of a three-dimensional model building apparatus for a road and canal network including bridge and culvert nodes according to an embodiment of the present invention, as shown in fig. 6, the apparatus includes:
the data acquisition module 601 is used for acquiring road and channel network data to be modeled; the road and channel network at least comprises a first line and a second line, and the road and channel network data at least comprises a first central line of the first line, a second central line of the second line, a first section corresponding to the first central line, a second section corresponding to the second central line and a bridge node between the first central line and the second central line; a model building module 602, configured to build a three-dimensional model of the road and channel network according to the road and channel network data.
The three-dimensional model construction device for a road and canal network including bridge and culvert nodes provided by the embodiments of the present invention specifically executes the flows of the above method embodiments, and specific details are given in the above method embodiments and will not be described herein again. According to the device provided by the embodiment of the invention, the bridge and culvert nodes, the central line and the section of each line in the road and channel network are used as the parameters for modeling, and the three-dimensional model of the road and channel network is constructed based on the parameters, so that the modeling efficiency and accuracy are improved, and the cost is reduced.
Fig. 7 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 7, the electronic device may include: a processor (processor) 701, a communication Interface (Communications Interface) 702, a memory (memory) 703 and a communication bus 704, wherein the processor 701, the communication Interface 702 and the memory 703 complete communication with each other through the communication bus 704. The processor 701 may invoke a computer program stored on the memory 703 and executable on the processor 701 to perform the methods provided by the embodiments described above, including for example: acquiring road and channel network data to be modeled; the road and channel network comprises a plurality of lines, the lines are roads or channels, and the road and channel network data comprises the center lines of the lines, sections corresponding to the center lines and bridge nodes among the center lines; and constructing a three-dimensional model of the road and channel network according to the road and channel network data.
In addition, the logic instructions in the memory 703 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented by a processor to execute the transmission method provided in the foregoing embodiments, for example, the method includes: acquiring road and channel network data to be modeled; the road and channel network comprises a plurality of lines, the lines are roads or channels, and the road and channel network data comprises the center lines of the lines, sections corresponding to the center lines and bridge nodes among the center lines; and constructing a three-dimensional model of the road and channel network according to the road and channel network data.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for constructing a three-dimensional model of a road and canal network containing bridge and culvert nodes is characterized by comprising the following steps:
acquiring road and channel network data to be modeled; the road and channel network at least comprises a first line and a second line, and the road and channel network data at least comprises a first central line of the first line, a second central line of the second line, a first section corresponding to the first central line, a second section corresponding to the second central line and a bridge node between the first central line and the second central line;
constructing a three-dimensional model of the road and channel network according to the road and channel network data;
according to the road and channel network data, constructing a three-dimensional model of the road and channel network, comprising the following steps:
determining a first node on the first central line, determining a second node on the second central line, and connecting the first node and the second node to form a bridge and culvert central line;
constructing a three-dimensional model of the road and channel network according to the first central line and the corresponding first section, the second central line and the corresponding second section, the bridge and culvert central line and the corresponding bridge and culvert sections and auxiliary sections;
according to the first center line and the corresponding first section, the second center line and the corresponding second section, the bridge and culvert center line and the corresponding bridge and culvert section and auxiliary section, constructing a three-dimensional model of the road and canal network, comprising:
constructing a first line model according to the first center line and the corresponding first section based on a TIN model construction method;
constructing a second line model according to the second center line and the corresponding second section based on a TIN model construction method;
constructing a bridge and culvert model according to the bridge and culvert central line and the corresponding bridge and culvert section based on a TIN model construction method;
constructing an auxiliary model according to the bridge and culvert center lines and the corresponding auxiliary sections based on a TIN model construction method;
combining the first line model, the second line model, the bridge model and the auxiliary model to obtain a three-dimensional model of the road and channel network;
combining the first line model, the second line model, the bridge model and the auxiliary model to obtain a three-dimensional model of the road and canal network, comprising:
performing model difference operation on the first line model and the auxiliary model to obtain a new first line model;
performing model difference operation on the second line model and the auxiliary model to obtain a new second line model;
and carrying out model and operation on the new first line model, the new second line model and the bridge model to obtain a three-dimensional model of the road and channel network.
2. The method according to claim 1, wherein the distance from the first node to the bridge node is equal to the distance from the second node to the bridge node, and the distance d is calculated by:
wherein l is the length of the central line of the bridge and culvert, and alpha is the deflection angle of the first central line relative to the extension line of the second central line.
3. The method of constructing a three-dimensional model of a road and canal network including bridge and culvert nodes of claim 1, wherein the first section and the second section are the same.
4. The method according to claim 3, wherein the bridge section is matched with the first section, the auxiliary section is rectangular, the height of the auxiliary section is equal to that of the first section, and the width of the auxiliary section is twice as large as the maximum width of the first section.
5. The utility model provides a three-dimensional model construction equipment of road and canal network that contains bridge and culvert node which characterized in that includes:
the data acquisition module is used for acquiring road and channel network data to be modeled; the road and channel network at least comprises a first line and a second line, and the road and channel network data at least comprises a first central line of the first line, a second central line of the second line, a first section corresponding to the first central line, a second section corresponding to the second central line and a bridge node between the first central line and the second central line;
the model construction module is used for constructing a three-dimensional model of the road and channel network according to the road and channel network data;
according to the road and channel network data, constructing a three-dimensional model of the road and channel network, comprising the following steps:
determining a first node on the first central line, determining a second node on the second central line, and connecting the first node and the second node to form a bridge and culvert central line;
constructing a three-dimensional model of the road and channel network according to the first central line and the corresponding first section, the second central line and the corresponding second section, the bridge and culvert central line and the corresponding bridge and culvert sections and auxiliary sections;
according to the first center line and the corresponding first section, the second center line and the corresponding second section, the bridge and culvert center line and the corresponding bridge and culvert section and auxiliary section, constructing a three-dimensional model of the road and canal network, comprising:
constructing a first line model according to the first center line and the corresponding first section based on a TIN model construction method;
constructing a second line model according to the second center line and the corresponding second section based on a TIN model construction method;
constructing a bridge and culvert model according to the bridge and culvert central line and the corresponding bridge and culvert section based on a TIN model construction method;
constructing an auxiliary model according to the bridge and culvert center lines and the corresponding auxiliary sections based on a TIN model construction method;
combining the first line model, the second line model, the bridge model and the auxiliary model to obtain a three-dimensional model of the road and channel network;
combining the first line model, the second line model, the bridge model and the auxiliary model to obtain a three-dimensional model of the road and canal network, comprising:
performing model difference operation on the first line model and the auxiliary model to obtain a new first line model;
performing model difference operation on the second line model and the auxiliary model to obtain a new second line model;
and carrying out model and operation on the new first line model, the new second line model and the bridge model to obtain a three-dimensional model of the road and channel network.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the method for constructing a three-dimensional model of a road and channel network including bridge and culvert nodes according to any one of claims 1 to 4.
7. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for constructing a three-dimensional model of a road and canal network including bridge nodes according to any one of claims 1 to 4.
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Citations (3)
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