CN113946643A

CN113946643A - Topographic map data processing method and device, readable medium and electronic equipment

Info

Publication number: CN113946643A
Application number: CN202111131309.0A
Authority: CN
Inventors: 何思宇; 邓颖; 汤泽源; 彭少局; 周兵南
Original assignee: Shenzhen Kusi Technology Co ltd
Current assignee: Shenzhen Kusi Technology Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-01-18

Abstract

The application provides a topographic map data processing method, a topographic map data processing device, a readable medium and electronic equipment, wherein the method comprises the following steps: acquiring topographic map data to be processed comprising a plurality of layer types; extracting to-be-processed topographic type data corresponding to each layer type from the to-be-processed topographic map data according to the layer name; processing the terrain type data to be processed according to a preset data processing rule to obtain a target terrain file corresponding to the terrain type data to be processed; and the preset data processing rules correspond to the layer types one to one. The technical scheme provided by the embodiment of the application not only reduces the workload of manually processing the topographic map data and improves the processing efficiency of the topographic map data, but also can accurately identify each layer data and avoid influence on the processing precision of the topographic map data caused by impurity mixing of each layer data.

Description

Topographic map data processing method and device, readable medium and electronic equipment

Technical Field

The application belongs to the technical field of computers and data processing, and particularly relates to a topographic map data processing method and device, a readable medium and electronic equipment.

Background

Topography measurement (topographic survey) refers to the process of mapping a topographic map, i.e., the work of measuring the features on the surface of the earth, the projected positions and elevations of the topography on a horizontal plane, reducing the measured features according to a certain proportion, and drawing the topographic map by using symbols and notations. Terrain surveying is an important task for the urban planning industry. Generally, practitioners in the city planning industry need to analyze measurement data obtained from topographic measurements to understand relevant topographic information. However, this analysis does not address all the measurement data, but requires a practitioner to manually extract the necessary useful information from the measurement data for analysis. However, the amount of information contained in the measurement data is huge and complex, and for example, the information includes independent features, road facilities, and soil and earth quality, and the way of manually extracting information by a practitioner is very inefficient, which is not conducive to the development of analysis work.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present application and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

Disclosure of Invention

The application aims to provide a method and a device for processing topographic map data, a readable medium and electronic equipment, so as to solve the problems of large workload and low efficiency of manually extracting topographic map data.

Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.

According to an aspect of an embodiment of the present application, there is provided a topographic map data processing method, including:

acquiring topographic map data to be processed comprising a plurality of layer types;

extracting to-be-processed topographic type data corresponding to each layer type from the to-be-processed topographic map data according to the layer name;

processing the terrain type data to be processed according to a preset data processing rule to obtain a target terrain file corresponding to the terrain type data to be processed; and the preset data processing rules correspond to the layer types one to one.

In one embodiment of the application, the terrain type data to be processed comprises contour line data to be processed, elevation point data to be processed and building data to be processed; the preset data processing rules comprise a first elevation value filtering rule, a second elevation value filtering rule and a building geometry extraction rule; processing the terrain type data to be processed according to a preset data processing rule to obtain a target terrain file corresponding to the terrain type data to be processed, wherein the processing method comprises the following steps:

processing the contour line data to be processed according to a first height value filtering rule to obtain a target contour line file;

processing the elevation point data to be processed according to a second elevation value filtering rule to obtain a target elevation point file;

and processing the building data to be processed according to the building geometry extraction rule to obtain a target building file.

In one embodiment of the application, the contour data to be processed comprises contour graphic data and contour annotation information; processing the contour data to be processed according to a first height value filtering rule to obtain a target contour file, wherein the processing comprises the following steps:

when the elevation value in the contour line marking information meets a first preset condition, removing the contour line corresponding to the elevation value from the contour line graphic data; when at least two same elevation values exist in the contour line marking information, merging contours corresponding to the at least two same elevation values in the contour line graphic data to obtain target contour line graphic data;

adding contour marking information corresponding to the target contour graph data to a preset contour attribute table to obtain target contour attribute information;

and generating the target contour line file according to the target contour line graphic data and the target contour line attribute information.

In one embodiment of the application, the to-be-processed elevation point data comprises elevation point graphic data and elevation point annotation information; processing the elevation point data to be processed according to a second elevation value filtering rule to obtain a target elevation point file, wherein the processing comprises the following steps:

when the elevation value in the elevation point annotation information meets a second preset condition, removing the elevation point corresponding to the elevation value from the elevation point graphic data to obtain target elevation point graphic data;

adding elevation point annotation information corresponding to the target elevation point graphic data to a preset elevation point attribute table to obtain target elevation point attribute information;

and generating the target elevation point file according to the target elevation point graphic data and the target elevation point attribute information.

In one embodiment of the present application, the building data to be processed includes building graphic data and building annotation information; processing the building data to be processed according to the building geometry extraction rule to obtain a target building file, wherein the processing comprises the following steps:

dividing the building graphic data into linear data and first planar data according to the graphic type in the building graphic data;

converting the linear data into second planar data;

performing surface element preprocessing on the first surface data and the second surface data to eliminate surface overlapping data and surface self-intersection data to obtain building geometric data;

extracting building geometric annotation information from the building annotation information according to building structure annotation rules;

adding the building geometric annotation information to a building attribute table corresponding to the building geometric data according to the relative position relationship between the building geometric annotation information and the building geometric data to obtain target building attribute information;

and generating the target building file according to the building geometric data and the target building attribute information.

In one embodiment of the present application, converting the line data into second planar data includes:

and performing line-line intersection processing on the linear data, and determining a closed surface according to the line-line intersection point to obtain second planar data.

In an embodiment of the present application, adding the building geometric annotation information to a building attribute table corresponding to the building geometric data according to a relative position relationship between the building geometric annotation information and the building geometric data, to obtain target building attribute information, includes:

associating the marking information in the geometric marking information of the building with the corresponding data in the geometric data of the building according to the relative position relationship between the geometric marking information of the building and the geometric data of the building;

extracting undetermined geometric data of unrelated annotation information in the building geometric data, and extracting non-building geometric annotation information except the building geometric annotation information in the building annotation information;

determining whether data in the pending geometric data can be associated with annotation information in the non-architectural geometric annotation information;

if the data in the undetermined geometric data cannot be associated with the marking information in the non-building geometric marking information, determining whether the data in the undetermined geometric data and the data in the building geometric data have intersecting data;

if the data in the undetermined geometric data and the data in the building geometric data have intersecting data, taking the data in the undetermined geometric data as the data in the building geometric data;

and adding the annotation information corresponding to the data in the building geometric data to a building attribute table corresponding to the building geometric data to obtain target building attribute information.

According to an aspect of an embodiment of the present application, there is provided a topographic map data processing apparatus including:

the data acquisition module is used for acquiring topographic map data to be processed, which comprises a plurality of layer types;

the data classification module is used for extracting the to-be-processed topographic type data corresponding to each layer type from the to-be-processed topographic map data according to the layer name;

the data processing module is used for processing the terrain type data to be processed according to a preset data processing rule so as to obtain a target terrain file corresponding to the terrain type data to be processed; and the preset data processing rules correspond to the layer types one to one.

According to an aspect of the embodiments of the present application, there is provided a computer-readable medium on which a computer program is stored, the computer program, when executed by a processor, implementing a method for processing topographic map data as in the above technical solutions.

According to an aspect of an embodiment of the present application, there is provided an electronic apparatus including: a processor; and a memory for storing executable instructions of the processor; wherein, the processor executes the executable instruction to make the electronic device execute the topographic map data processing method in the technical scheme.

According to an aspect of embodiments herein, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the topographic map data processing method as in the above technical solution.

According to the technical scheme, the to-be-processed topographic map type data corresponding to each layer type in the to-be-processed topographic map data are extracted according to the layer names and then processed according to the preset data processing rule corresponding to the to-be-processed topographic map type data, the target topographic map file is obtained, automatic processing of the topographic map data is achieved, workload of manual processing of the topographic map data is reduced, processing efficiency of the topographic map data is improved, the layer data can be accurately identified, and the situation that processing accuracy of the topographic map data is affected due to the fact that the layer data are mixed is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 schematically shows a block diagram of an exemplary system architecture to which the solution of the present application applies.

Fig. 2 schematically shows a flowchart of a topographic map data processing method according to an embodiment of the present application.

Fig. 3 schematically shows a flow chart of step 230 in an embodiment of the present application.

Fig. 4 schematically shows a flow chart of step 330 in an embodiment of the present application.

Fig. 5 schematically shows a flow chart of step 450 in an embodiment of the present application.

Fig. 6 schematically shows a block diagram of a topographic map data processing device provided in an embodiment of the present application.

FIG. 7 schematically illustrates a block diagram of a computer system suitable for use in implementing an electronic device of an embodiment of the present application.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.

The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.

The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

As shown in fig. 1, system architecture 100 may include a terminal device 110, a network 120, and a server 130. The terminal device 110 may include various electronic devices such as a smart phone, a tablet computer, a notebook computer, and a desktop computer. The server 130 may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing cloud computing services. Network 120 may be a communication medium of various connection types capable of providing a communication link between terminal device 110 and server 130, such as a wired communication link or a wireless communication link.

The system architecture in the embodiments of the present application may have any number of terminal devices, networks, and servers, according to implementation needs. For example, the server 130 may be a server group composed of a plurality of server devices. In addition, the technical solution provided in the embodiment of the present application may be applied to the terminal device 110, or may be applied to the server 130, or may be implemented by both the terminal device 110 and the server 130, which is not particularly limited in this application.

For example, the terminal device 110 is a surveying and mapping photographing device, and the terminal device 110 performs photographing and mapping on a terrain within a target region range to obtain to-be-processed terrain map data including multiple map layer types, and then sends the to-be-processed terrain map to the server 130. After obtaining to-be-processed topographic map data including multiple map layer types, the server 130 extracts to-be-processed topographic type data corresponding to each map layer type from the to-be-processed topographic map data according to the map layer name; then processing the terrain type data to be processed according to a preset data processing rule to obtain a target terrain file corresponding to the terrain type data to be processed; and the preset data processing rules correspond to the layer types one by one.

In an embodiment of the present application, the topographic map data processing method provided by the embodiment of the present application is executed by the server 130, and accordingly, the topographic map data processing apparatus is generally disposed in the server 130. However, it is easily understood by those skilled in the art that the method for processing the topographic map data provided in the present embodiment may also be executed by the terminal device 110, and accordingly, the topographic map data processing apparatus may also be disposed in the terminal device 110, which is not particularly limited in the present exemplary embodiment. For example, in an exemplary embodiment, after obtaining the to-be-processed topographic map data including multiple map layer types, the terminal device 110 processes the to-be-processed topographic map data to obtain the target topographic file.

The topographic map data processing provided by the present application will be described in detail below with reference to specific embodiments.

Fig. 2 schematically shows a flowchart of a topographic map data processing method according to an embodiment of the present application. As shown in fig. 2, the method for processing topographic map data provided in the embodiment of the present application includes steps 210 to 230, which are specifically as follows:

step 210, obtaining to-be-processed topographic map data including multiple layer types.

Specifically, the topographic map refers to a projection of the topography and the geographic location, shape on a horizontal plane. Specifically, the ground features and the land features on the ground are projected horizontally (projected onto a horizontal plane along a vertical line) and are reduced to a certain scale on a drawing, which is called a topographic map. The topographic data to be processed is obtained by topographic mapping of the terrain within the target region, for example, obtained by means of artificial photogrammetry, aerial photogrammetry, or space remote sensing surveying. The topographic map data to be processed generally includes graphic data and annotation information. The graphic data is a graphic of a terrain within a drawing target region, such as a contour line, a building, and the like. The annotation information is a textual description of the graphic data, and corresponds to an annotation of the graphic data, such as an elevation value of a contour line, a building structure, and the like.

In the embodiment of the application, the to-be-processed topographic map data is standardized topographic map data formed by preprocessing on the basis of original topographic mapping data, and the preprocessing is to divide the layers of the original topographic mapping data, so that the to-be-processed topographic map data has multiple layer types. The topographic map data to be processed of one layer type corresponds to topographic map data of one topographic type. Terrain types such as contour lines (DGX), elevation points (GCD), residential areas (JMD), etc.

And step 220, extracting the to-be-processed topographic type data corresponding to each layer type from the to-be-processed topographic map data according to the layer name.

Generally, the data format of the topographic map data to be processed is dwg format, that is, the topographic map data to be processed is presented in the form of a CAD file, and the layer name of the topographic map data to be processed corresponds to the layer type. Generally, the layer name indicates the layer type, so that the to-be-processed terrain type data corresponding to each layer type can be distinguished and extracted according to the layer name. For example, if the layer name is DGX, extracting data corresponding to the DGX layer from the topographic map data to be processed to obtain topographic map data corresponding to contour lines in the topographic type, which is called contour line data to be processed; for another example, if the layer name is GCD, extracting data corresponding to the GCD layer from the topographic map data to be processed, to obtain topographic map data corresponding to the elevation points of the topographic type, which is referred to as elevation point data to be processed; for another example, if the layer name is JMD, the data corresponding to the JMD layer is extracted from the to-be-processed topographic map data, and the topographic map data corresponding to the residential area of the landform type is obtained.

Step 230, processing the terrain type data to be processed according to a preset data processing rule to obtain a target terrain file corresponding to the terrain type data to be processed; and the preset data processing rules correspond to the layer types one by one.

Specifically, after the topographic map data to be processed is divided into topographic type data to be processed of multiple topographic types, the topographic type data to be processed is processed according to a preset data processing rule corresponding to each topographic type data to be processed, and a target topographic file corresponding to the topographic type data to be processed is obtained. And processing the terrain type data to be processed according to a preset data processing rule, namely extracting available data of the terrain type data to be processed and rejecting invalid or error data in the terrain type data to be processed.

In an embodiment of the application, the preset data processing rules correspond to the layer types one to one, so that the to-be-processed terrain type data can be determined according to the corresponding layer types. For example, the preset data processing rule is determined to be a first elevation value filtering rule based on the contour line image layer, the preset data processing rule is determined to be a second elevation value filtering rule based on the elevation point image layer, and the preset data processing rule is determined to be a building geometric extraction rule based on the resident map layer.

In an embodiment of the present application, as shown in fig. 3, the process of processing the terrain type data to be processed according to the preset data processing rule includes steps 310 to 330, specifically:

and 310, processing the contour line data to be processed according to the first elevation value filtering rule to obtain a target contour line file.

Specifically, the contour data to be processed includes contour graphic data and contour annotation information, and the contour annotation information mainly annotates the elevation value of the contour in the contour graphic data. The first height value filtering rule is mainly used for removing non-contour data and carrying out duplicate removal processing on the contour data. The processing of the contour data to be processed according to the first elevation value filtering rule specifically includes: when the elevation value in the contour line marking information meets a first preset condition, removing the contour line corresponding to the elevation value from the contour line graphic data; and when at least two same elevation values exist in the contour line marking information, merging the contour lines corresponding to the at least two same elevation values in the contour line graphic data to obtain target contour line graphic data.

In one embodiment of the present application, the first preset condition includes: the elevation value is less than 0, and the elevation value is empty or is not an integral multiple of 0.5. When the elevation value in the contour line annotation information meets a first preset condition, the graph corresponding to the annotation information does not belong to the contour line, and therefore the contour line corresponding to the annotation information is removed from contour line graph data. For example, if the height value in the contour registration information is 0.75 and the height value is not an integral multiple of 0.5, the contour corresponding to the height value is deleted from the contour map data.

Generally, for a certain height (i.e. a certain elevation value), the topographic map should have a unique contour, so when at least two identical elevation values exist in the contour marking information, it indicates that there are repeated contours in the contour map data, and at this time, the contours corresponding to the at least two identical elevation values should be merged to avoid the influence of the repeated data.

And removing the non-contour line data and carrying out duplication removal treatment on the contour line data to obtain target contour line graphic data.

The target contour file typically includes two parts: the contour graph is target contour graph data, and the contour attribute is target contour attribute information formed by writing the marking information of the contour into a preset contour attribute table. Therefore, after the target contour graph data is obtained, the contour annotation information corresponding to the target contour graph data needs to be written into the preset contour attribute table to form the target contour attribute information.

And 320, processing the elevation point data to be processed according to the second elevation value filtering rule to obtain a target elevation point file.

Specifically, the elevation point data to be processed comprises elevation point graphic data and elevation point annotation information, wherein the elevation point annotation information is mainly used for annotating the elevation value of the elevation point in the elevation point graphic data. The second elevation filtering rule is primarily used to remove non-elevation point data. The processing the elevation point data to be processed according to the second elevation value filtering rule specifically comprises: and when the elevation value in the elevation point annotation information meets a second preset condition, removing the elevation point corresponding to the elevation value from the elevation point pattern data to obtain target elevation point pattern data.

In one embodiment of the present application, the second preset condition includes: the elevation value is less than 0, and the number of the elevation value is not two. When the elevation value in the elevation point annotation information meets a second preset condition, the graph corresponding to the annotation information does not belong to the elevation point, and therefore the elevation point corresponding to the annotation information is removed from the elevation point graph data. For example, if an elevation value in the elevation point annotation information is 0.215 and the number of the elevation value decimal points is not two, the elevation point corresponding to the elevation value is deleted from the elevation point graphic data.

And removing the non-elevation point data to obtain target elevation point graphic data. After the target elevation point graphic data are obtained, elevation point annotation information corresponding to the target elevation point graphic data are added to a preset elevation point attribute table to obtain target elevation point attribute information. And finally obtaining a target elevation point file formed by the target elevation point graphic data and the target elevation point attribute information.

And step 330, processing the building data to be processed according to the building geometry extraction rule to obtain a target building file.

Specifically, the building data to be processed includes building graphic data and building annotation information. The building graphic data includes a building graphic composed of elements such as lines and surfaces. The building annotation information includes building name, road name, building structure and floor number information, etc., and may also include some non-building information.

In one embodiment of the present application, as shown in fig. 4, the process of processing the building data to be processed according to the building geometry extraction rule includes steps 410 to 460, which are as follows:

and step 410, dividing the building graphic data into linear data and first planar data according to the graphic types in the building graphic data.

Specifically, the graphic type includes line elements and face elements. The building graphic data is divided according to the graphic type, that is, data belonging to a line element in the building graphic data is divided into linear data, and data belonging to a face element in the building graphic data is divided into first face data.

In the present application and one embodiment, the linear data refers to linear data other than line segments constituting the surface elements, that is, line segments in the linear data cannot directly constitute the surface.

Step 420, converting the linear data into second planar data.

Specifically, after the linear data are obtained, the linear data are converted into second planar data, so that the building graph data are uniformly converted into planar data to be processed.

In an embodiment of the present application, the process of converting the linear data into the second planar data specifically includes: and performing line-line intersection processing on the linear data, and determining a closed surface according to the line-line intersection point to obtain second planar data. Since the linear data cannot directly form a plane, the line intersection here means that a line segment is extended to intersect, the line segment is extended to intersect to obtain an intersection point, and a closed plane is formed by the plurality of intersection points and the line segments between the intersection points, and the closed plane is the second planar data.

And 430, performing surface element preprocessing on the first surface data and the second surface data to eliminate surface overlapping data and surface self-intersection data to obtain building geometric data.

Specifically, as the building has geometrical problems of non-closing, overlapping, self-intersection and the like, the building geometrical data is obtained by eliminating the surface overlapping data and the surface self-intersection data in the first surface data and the second surface data through surface element preprocessing. The face element pre-processing may include a superposition comparison of the first face shape data and the second face shape data to determine whether face overlap data or face self-intersection data exists.

And step 440, extracting the building geometric annotation information from the building annotation information according to the building structure annotation rule.

Specifically, the building structure annotation rule is a rule for annotating a building structure, which indicates how the building structure should be annotated, what content the annotation information of the building structure should contain, and the like. The building geometric annotation information refers to the building structure and floor number information in the building structure annotation information. Building structures represent architectural properties including concrete, brick, stone, wood, and soil. Concrete refers to a concrete structure building, concrete refers to a brick-concrete structure building taking reinforced concrete as beams and columns, bricks refer to a brick building without reinforced concrete columns and beams, stone refers to a building with external walls constructed by barred rocks or stones, wood refers to a building with wood columns as a bearing structure, and soil refers to an old-fashioned earthen house constructed by ramming clay and building walls. The floor number information is the floor height of the building. For example, if the building annotation information is hybrid 3, which indicates that the corresponding building is a 3-story high hybrid structure building, the building annotation information is extracted as the building geometric annotation information.

And 450, adding the geometric construction annotation information to a construction attribute table corresponding to the geometric construction data according to the relative position relationship between the geometric construction annotation information and the geometric construction data to obtain target construction attribute information.

Specifically, according to the relative position relationship between the building geometric annotation information and the building geometric data, the annotation information in the building geometric annotation information is associated with the corresponding data in the building geometric data, and then the building geometric annotation information is added to a building attribute table corresponding to the building geometric data to obtain the target building attribute information.

In one embodiment of the present application, as shown in fig. 5, step 450 further includes steps 510 to 560, which are as follows:

and step 510, associating the marking information in the building geometric marking information with corresponding data in the building geometric data according to the relative position relation between the building geometric marking information and the building geometric data.

Specifically, the building geometric annotation information and the building geometric data are related according to the relative position relationship of the building geometric annotation information and the building geometric data, and the annotation information corresponding to the building in the building geometric data is also determined. For example, building a corresponds to annotation information 1, building a is associated with annotation information 1 so that its corresponding annotation information 1 can be invoked later when building a is viewed.

And step 520, extracting undetermined geometric data which are not related to the annotation information in the building geometric data, and extracting non-building geometric annotation information except the building geometric annotation information in the building annotation information.

Specifically, some buildings may have no corresponding annotation information temporarily in the building geometric data, and the building data is extracted as the geometric data to be determined. Meanwhile, the annotation information in the building annotation information except the building geometric annotation information is used as non-building geometric annotation information, so that the non-building geometric annotation information is the annotation information which does not contain building structure and floor information.

Step 530, determining whether the data in the pending geometric data can be associated with the marking information in the non-building geometric marking information.

Specifically, the data in the geometric data to be determined and the marking information in the geometric marking information of the non-building are subjected to intersection processing, so that whether the data and the marking information are related or not can be determined. If the data in the geometric data to be determined can be intersected with the marking information in the non-building geometric marking information, it is indicated that the data in the geometric data to be determined and the marking information in the non-building geometric marking information are corresponding to each other (i.e. are associated with each other), so that the data in the geometric data to be determined belongs to the non-building data, and at the moment, the data is discarded without performing subsequent processing on the data. If the data in the geometric data to be determined cannot intersect with the annotation information in the non-building geometric annotation information, step 540 is entered.

And 540, if the data in the undetermined geometric data cannot be associated with the marking information in the non-building geometric marking information, determining whether the data in the undetermined geometric data and the data in the building geometric data have intersecting data.

Specifically, if data in the geometric data to be determined cannot intersect with marking information in the geometric marking information of the non-building, that is, the data in the geometric data to be determined cannot be non-building data but building data, it is determined whether the data in the geometric data to be determined is building data by determining whether the data in the geometric data to be determined and the data in the geometric data of the building intersect with each other. If the data in the undetermined geometric data and the data in the building geometric data do not have intersecting data, the data in the undetermined geometric data is not the building data, and the data is discarded at the moment, and is not subjected to subsequent processing. If the data in the pending geometric data and the data in the building geometric data have intersecting data, the process proceeds to step 550.

And step 550, if the data in the to-be-determined geometric data and the data in the building geometric data have intersecting data, taking the data in the to-be-determined geometric data as the data in the building geometric data.

Specifically, if data in the undetermined geometric data and data in the building geometric data have intersecting data, it is indicated that the data in the undetermined geometric data belongs to the building data, and the data is taken as the data in the building geometric data.

And step 560, adding the annotation information corresponding to the data in the building geometric data to a building attribute table corresponding to the building geometric data to obtain target building attribute information.

Specifically, the data in the finally determined building geometric data is associated with the corresponding annotation information, and the associated annotation information is added to the building attribute table corresponding to the building geometric data to obtain the target building attribute information

With continued reference to FIG. 4, a target building file is generated based on the building geometry data and the target building attribute information, step 460.

Specifically, after the building geometric data and the target building attribute information are obtained, a target building file is formed.

It should be noted that although the various steps of the methods in this application are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the shown steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.

The following describes embodiments of the apparatus of the present application, which may be used to perform the topographic map data processing method in the above-described embodiments of the present application. Fig. 6 schematically shows a block diagram of a topographic map data processing device provided in an embodiment of the present application. As shown in fig. 6, a topographic map data processing apparatus provided in an embodiment of the present application includes:

a data obtaining module 610, configured to obtain to-be-processed topographic map data including multiple layer types;

a data classification module 620, configured to extract to-be-processed topographic type data corresponding to each layer type from the to-be-processed topographic map data according to the layer name;

the data processing module 630 is configured to process the to-be-processed terrain type data according to a preset data processing rule to obtain a target terrain file corresponding to the to-be-processed terrain type data; and the preset data processing rules correspond to the layer types one to one.

In one embodiment of the application, the terrain type data to be processed comprises contour line data to be processed, elevation point data to be processed and building data to be processed; the preset data processing rules comprise a first elevation value filtering rule, a second elevation value filtering rule and a building geometry extraction rule; the data processing module 630 includes:

the contour processing unit is used for processing the contour data to be processed according to a first height value filtering rule to obtain a target contour file;

the elevation point processing unit is used for processing the elevation point data to be processed according to a second elevation value filtering rule to obtain a target elevation point file;

and the building processing unit is used for processing the building data to be processed according to the building geometry extraction rule to obtain a target building file.

In one embodiment of the application, the contour data to be processed comprises contour graphic data and contour annotation information; the contour processing unit is specifically configured to:

In one embodiment of the application, the to-be-processed elevation point data comprises elevation point graphic data and elevation point annotation information; the elevation point processing unit is specifically configured to:

In one embodiment of the present application, the building data to be processed includes building graphic data and building annotation information; the building processing unit includes:

a data dividing subunit, configured to divide the building graph data into linear data and first planar data according to a graph type in the building graph data;

a line-surface transformation unit for transforming the line-shaped data into second surface-shaped data;

the preprocessing subunit is used for performing surface element preprocessing on the first and second planar data to eliminate surface overlapping data and surface self-intersection data and obtain building geometric data;

the annotation information extraction subunit is used for extracting the building geometric annotation information from the building annotation information according to building structure annotation rules;

the attribute hooking subunit is used for adding the building geometric annotation information to a building attribute table corresponding to the building geometric data according to the relative position relationship between the building geometric annotation information and the building geometric data to obtain target building attribute information;

and the target building file generating subunit is used for generating the target building file according to the building geometric data and the target building attribute information.

In one embodiment of the present application, the line-plane transformant unit is specifically used for:

In an embodiment of the present application, the attribute hooking subunit is specifically configured to:

The specific details of the topographic map data processing apparatus provided in the embodiments of the present application have been described in detail in the corresponding method embodiments, and are not described herein again.

Fig. 7 schematically shows a block diagram of a computer system of an electronic device for implementing an embodiment of the present application.

It should be noted that the computer system 700 of the electronic device shown in fig. 7 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.

As shown in fig. 7, the computer system 700 includes a Central Processing Unit (CPU) 701 that can perform various appropriate actions and processes according to a program stored in a Read-Only Memory (ROM) 702 or a program loaded from a storage section 708 into a Random Access Memory (RAM) 703. In the random access memory 703, various programs and data necessary for system operation are also stored. The cpu 701, the rom 702, and the ram 703 are connected to each other via a bus 704. An Input/Output interface 705(Input/Output interface, i.e., I/O interface) is also connected to the bus 704.

The following components are connected to the input/output interface 705: an input portion 706 including a keyboard, a mouse, and the like; an output section 707 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and a speaker; a storage section 708 including a hard disk and the like; and a communication section 709 including a network interface card such as a local area network card, a modem, and the like. The communication section 709 performs communication processing via a network such as the internet. A driver 710 is also connected to the input/output interface 705 as necessary. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read out therefrom is mounted into the storage section 708 as necessary.

In particular, according to embodiments of the present application, the processes described in the various method flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 709, and/or installed from the removable medium 711. The computer program, when executed by the central processor 701, performs various functions defined in the system of the present application.

It should be noted that the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or process a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be processed by any suitable medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.

Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of the present application.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A method for processing topographic map data, comprising:

2. The topographic map data processing method according to claim 1, wherein the topographic type data to be processed includes contour data to be processed, elevation point data to be processed, and building data to be processed; the preset data processing rules comprise a first elevation value filtering rule, a second elevation value filtering rule and a building geometry extraction rule; processing the terrain type data to be processed according to a preset data processing rule to obtain a target terrain file corresponding to the terrain type data to be processed, wherein the processing method comprises the following steps:

3. The topographical data processing method according to claim 2, wherein the contour data to be processed includes contour graphic data and contour annotation information; processing the contour data to be processed according to a first height value filtering rule to obtain a target contour file, wherein the processing comprises the following steps:

4. The topographic map data processing method according to claim 2, wherein the elevation point data to be processed includes elevation point graphic data and elevation point annotation information; processing the elevation point data to be processed according to a second elevation value filtering rule to obtain a target elevation point file, wherein the processing comprises the following steps:

5. The topographic map data processing method according to claim 2, wherein the building data to be processed includes building graphic data and building annotation information; processing the building data to be processed according to the building geometry extraction rule to obtain a target building file, wherein the processing comprises the following steps:

converting the linear data into second planar data;

6. The topographical data processing method of claim 5, wherein converting the line data into second areal data comprises:

7. The method for processing the topographic map data according to claim 5, wherein the step of adding the geometric building annotation information to a building attribute table corresponding to the geometric building data according to the relative position relationship between the geometric building annotation information and the geometric building data to obtain target building attribute information comprises the following steps:

8. A topographical data processing apparatus, comprising:

9. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the topographic map data processing method as claimed in any of claims 1 to 7.

10. An electronic device, comprising:

a processor; and

a memory for storing executable instructions of the processor;

wherein execution of the executable instructions by the processor causes the electronic device to perform the method of processing topographical data according to any one of claims 1 to 7.