CN114049452A - Construction system and method of indoor three-dimensional map - Google Patents

Abstract

The invention relates to a construction method of an indoor three-dimensional map, which comprises the following steps: constructing a two-dimensional map of a target range containing one or more single buildings, and endowing the two-dimensional map with a unique target identifier of target map data and target attributes containing geometric information, attribute information and traffic information; constructing a two-dimensional map of each single building in the target range, and endowing the single building map data with a unique building identifier and building attributes comprising geometric information, attribute information and traffic information; constructing a two-dimensional map of each floor contained in each single building, and giving a unique floor identification of each floor map data and a floor attribute containing geometric information, attribute information and traffic information; and constructing a plurality of layer data of each of the target map data, the building map data and the floor map data, and giving a unique layer identifier of each layer data and layer attributes including geometric information, attribute information and traffic information.

Description

Construction system and method of indoor three-dimensional map

Technical Field

The invention relates to the field of map construction, in particular to a construction system and a construction method for an indoor three-dimensional map.

Background

A Global Positioning System (GPS) can provide a high-precision outdoor location service, but the GPS signal is very weak or even invisible indoors due to the obstruction of a building, so the GPS positioning system is not basically applied to indoor positioning. Today, 80% of people's activities are performed indoors, and location-based services are therefore gaining more and more attention. With the rapid development of radio technology and the advent of various advanced electronic products, indoor positioning and navigation technology has come to be used as a supplement to GPS.

With the rapid development of mobile intelligent terminal equipment, smart phones are no longer simple communication tools, but become necessities of people's daily life and have a plurality of important applications such as navigation and calculation. The smart phone has fast operation speed and is portable, and various sensors such as a magnetometer, an acceleration sensor, a gyroscope and the like are integrated. These all provide the possibility for high accuracy indoor positioning with a smartphone.

However, indoor navigation requires maps as a prerequisite, and navigation without maps can only give a point-to-point direction and cannot give a navigation path when. The existing indoor navigation, especially the navigation in each floor, can only give the specific altitude of a user to a certain extent, and cannot give the navigation of different floors, which is a problem caused by that an indoor map cannot give an indoor three-dimensional map. For this reason, it is desirable to obtain a three-dimensional map of the inside of a room when entering the room from the outside, so that accurate guidance can be provided for a user's navigation in the room.

Disclosure of Invention

Therefore, the present disclosure provides a method of constructing an indoor three-dimensional map and a system of constructing an indoor three-dimensional map in order to provide accurate indoor navigation guidance. According to one aspect of the present disclosure, there is provided a method for constructing an indoor three-dimensional map, including: constructing a two-dimensional map of a target range containing one or more single buildings, and endowing the two-dimensional map with a unique target identifier of target map data and target attributes containing geometric information, attribute information and traffic information; constructing a two-dimensional map of each single building in the target range, and endowing the single building map data with a unique building identifier and building attributes comprising geometric information, attribute information and traffic information; constructing a two-dimensional map of each floor contained in each single building, and giving a unique floor identification of each floor map data and a floor attribute containing geometric information, attribute information and traffic information; and constructing a plurality of layer data of each of the target map data, the building map data and the floor map data, and giving a unique layer identifier of each layer data and layer attributes including geometric information, attribute information and traffic information.

The method for constructing the indoor three-dimensional map further comprises the following steps: attributes are assigned to the target that contain a structural description that describes the organizational and topological relationships between the building/buildings in the target.

The method for constructing the indoor three-dimensional map further comprises the following steps: building attributes are assigned that contain a structural description that describes the organization and topological relationships between the floor/floors in the building.

The method for constructing the indoor three-dimensional map further comprises the following steps: assigning floor attributes comprising structure descriptions, wherein the structure descriptions describe organization and topological relationships between the layer/layers in the floor.

The method for constructing the indoor three-dimensional map further comprises the following steps: layer attributes are assigned that include an element description, wherein the element description specifies a data unique identification, geometry, type, name, and description of an element that may be in the layer.

The method for constructing the indoor three-dimensional map further comprises the following steps: the target map data, the building map data, and the floor map data are stored using the same first-level suffix file name so as to unify the formats of all the map data, and a second-level suffix file is given to a specific map data by the map level where the map data is located, thereby determining the map level of each map data.

According to another aspect of the present disclosure, there is provided a construction system of an indoor three-dimensional map, including: the target map construction component is used for constructing a two-dimensional map of a target range containing one or more single buildings, giving a unique target identifier to target map data of the two-dimensional map and giving target attributes containing geometric information, attribute information and traffic information; the building map construction component is used for constructing a two-dimensional map of each single building in the target range, and endowing the single building map data with a unique building identifier and building attributes containing geometric information, attribute information and traffic information; the floor map construction component is used for constructing a two-dimensional map of each floor contained in each single building, and endowing unique floor identification of each floor map data and floor attributes containing geometric information, attribute information and traffic information; and the layer map construction component is used for constructing a plurality of layer data of each of the target map data, the building map data and the floor map data, and endowing a unique layer identifier of each layer data and layer attributes including geometric information, attribute information and traffic information.

According to the construction system of the indoor three-dimensional map of the present disclosure, the target map construction component further assigns target attributes including a structural description describing organization and topological relationships between single/multiple buildings in the target.

The system for building an indoor three-dimensional map according to the present disclosure, wherein the target map building component further assigns building attributes comprising a structural description, wherein the structural description describes the organization and topological relationships between single/multiple floors in the building.

The building system of the indoor three-dimensional map according to the present disclosure, wherein the building map building component further assigns floor attributes including a structural description, wherein the structural description describes organization and topological relationships between the layer/layers in the floor.

The building system of the indoor three-dimensional map according to the disclosure, wherein the floor map building component also gives layer attributes containing element description, wherein the element description indicates data unique identification, geometric shape, type, name and description of elements in the layer.

The construction system of the indoor three-dimensional map according to the present disclosure further includes a map data association component that stores the target map data, the building map data, and the floor map data using the same first-level suffix file name so as to unify formats of all the map data, and assigns a second-level suffix file to a specific map data by a map level where the map data is located, thereby determining a map level of each map data.

By adopting the construction system and the construction method of the indoor three-dimensional map, the outdoor map and the indoor map can be seamlessly connected, the indoor maps of all layers are constructed one by one and endowed with attributes of the maps of all layers, and the relevance between the maps of all layers and the outdoor single building map is established, so that the indoor three-dimensional map has the universality with the outdoor map, has necessary spatial data content and basic attribute information content, and meets the requirements of various industries on the indoor map. Moreover, since the indoor map data of the present disclosure are objectively associated according to floors, the indoor three-dimensional map formed by the construction method and the construction system of the present disclosure has scalability of layers and scalability of attribute information, that is, the indoor three-dimensional map constructed by the present disclosure supports physical structure expansion of an indoor space structure, supports any number of floors, supports multi-layer expansion within a floor, and supports basic space element types: any number of points, lines and surfaces are expanded; in addition, the map element is provided with a globally unique spatial identifier, and one-to-one association binding with three-party data is supported. Moreover, aiming at the situation that indoor map data is mainly used for expressing space data information in a medium-small range and the difference between the total amount of space data in different ranges and the complexity is large, the indoor three-dimensional map construction system can provide three-dimensional map construction with flexibility for different targets, namely the three-dimensional map construction system supports map data contents of parks and single buildings in different ranges and also supports single building map data contents in different total amounts. In addition, the map data are cached and transmitted in the loading process, so that huge transmission overhead and memory space overhead are caused, the map data adopted by the indoor three-dimensional map building system disclosed by the invention are loaded on demand, the format of the map data is characterized by small transmission data volume and small storage space requirement, and the data tile loading is supported, so that the indoor three-dimensional map building system has the characteristic of high performance. More importantly, because the data format adopts a unique number, the data has definite ownership, and support is provided for data security.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

The disclosure will now be described in detail, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram illustrating an implementation target of an indoor three-dimensional map construction method according to the present disclosure.

FIG. 2 is a schematic diagram illustrating an example of an indoor three-dimensional mapping system according to the present disclosure.

Fig. 3 is a general flow diagram illustrating an embodiment of an indoor three-dimensional map building method according to the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, one of the two floors may be referred to as a first floor and may also be referred to as a second floor hereinafter, and similarly, the other of the two floors may be referred to as a second floor and may also be referred to as a first floor, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

For a better understanding of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram illustrating an implementation target of an indoor three-dimensional map construction method according to the present disclosure. As shown in fig. 1, a method for constructing a three-dimensional map object is shown, in which an example of a campus is located. Within the park there are a plurality of individual buildings a and B and a basement space B1 common to the individual buildings. Each individual building will also have its own individual underground spaces B1 and B2 and its own above ground floor spaces F1, F2, F3 …, etc. A user of a campus may integrally form two-dimensional map data suitable for outdoor use, which includes one or more individual buildings and a common underground space constituting the whole campus thereof, floor information and underground space information included in each individual building, and two-dimensional map data of each floor and underground space of each individual building and physical positional relationship between each floor, for the campus, as a target range. The campus proprietor can form the two-dimensional map data of each individual building, the two-dimensional map data of each floor, and the two-dimensional map data of each underground space layer according to a conventional manner.

FIG. 2 is a schematic diagram illustrating an example of an indoor three-dimensional mapping system according to the present disclosure. As shown in fig. 2, the construction system 200 of the indoor three-dimensional map includes: a target map construction component 210, a target map construction component 220, a floor map construction component 230, and a layer map construction component 240. The object map construction component 210 constructs a two-dimensional map of an object range containing one or more individual buildings, giving its object map data a unique object identification and object attributes containing geometric information, attribute information and traffic information. The map data of the two-dimensional map of each target range comprises the content description of the map, the unique target identification of the map data, version information for determining the version number of the map version, geometric information of spatial information content such as the geometric shape and range of a surface target map, attribute information of the name, type and description of the target map and structure information of organization and topological relation content of single/multiple buildings contained in the target map. The user is presented with the structural information so that the user can autonomously choose to further load the map data of the building to be presented or to further present the map data of a specific floor of the building.

The building map construction component 220 constructs a two-dimensional map of each individual building within the target range, giving it a unique building identification for the individual building map data and building attributes including geometric information, attribute information, and traffic information. The map data of the two-dimensional map of each single building comprises the description of the content of the map, building identification unique to the building data, version information for determining the building structure version number and the building content version number of the map version, geometric information comprising the spatial information content such as the geometric shape and the range of the building, attribute information comprising the name, the type and the description of the building map, and structure information comprising the organization and topological relation content of a single floor or a plurality of floors contained in the building map. The user is presented with the structural information so that the user can autonomously choose to further load the map data of the specific floor of the building to be presented.

The floor map construction component 230 constructs a two-dimensional map of each floor included in each individual building, gives a unique floor identification to each floor map data, and gives floor attributes including geometric information, attribute information, and traffic information. The map data of the two-dimensional map of each floor comprises the content description of the map, a floor identifier unique to the floor data, version information for determining the floor structure version number and the floor content version number of the map version, geometric information comprising the spatial information content such as the geometric shape and the range of the floor, attribute information comprising the name, the type and the description of the floor map, and structure information comprising the organization and the topological relation content of single/multiple elements contained in the floor map. The user is presented with the structural information so that the user can autonomously choose to further load the map data of the specific element or the specific layer of the floor to be presented.

The layer map construction component 240 constructs a plurality of layer data of each of the target map data, the building map data, and the floor map data, and assigns a unique layer identifier to each layer data and a layer attribute including geometric information, attribute information, and traffic information. The map data of the two-dimensional map of each layer comprises the content description of the layer, the unique building identification of the layer data, the version information used for determining the layer structure version number and the layer content version number of the map version, the geometric information of the spatial information content such as the geometric shape and the range of the layer, the unique data identification of a single element, the geometric shape content of the single element, the unit description information of the attribute information content such as the name, the type and the description of the single element. The map display is richer by displaying a plurality of layers, the information of the map can be expanded by different layers, the information can comprise commodity information of shops on specific floors and the like, and an expansion entrance is provided for commercial application of the indoor map.

As shown in fig. 2, the construction system 200 of the indoor three-dimensional map according to the present disclosure further includes a map data association component 250 that stores the target map data, the building map data, and the floor map data with the same first-level suffix file name so as to unify the formats of all the map data, and assigns a second-level suffix file to a specific map data by the map level where the map data is located, thereby determining the map level of each map data. As an example, the storage mode of all map parts is to store by using binary files, and the map parts are divided into the following parts according to the data content: structure, point element, line element, surface element. The storage file adopts a unified suffix xxx.fmap, and defines a secondary suffix name according to the file role, such as xxx.map.fmap: storing a map structure and basic information content, which are entry files loaded by the map; xxx. gene. fmap (xxx. building. fmap): storing the single building structure and the basic information content; xxx.geo.fmap: storing geometric information of points, lines and surface elements in a map or a single building according to floors; xxx, bz, fmap: storing attribute information of points, lines and surface elements in a map or a single building according to floors; xxx. navi. fmap: and storing the traffic information of points, lines and surface elements in the map or the single building according to floors.

Fig. 3 is a general flow diagram illustrating an embodiment of an indoor three-dimensional map building method according to the present disclosure. As shown in fig. 3, first, at step S310, a two-dimensional map of a target area containing one or more individual buildings is constructed by the target map construction component 210, to which target map data is given a unique target identification and target attributes containing geometric information, attribute information, and traffic information. The map data of the two-dimensional map of each target range comprises the content description of the map, the unique target identification of the map data, version information for determining the version number of the map version, geometric information of spatial information content such as the geometric shape and range of a surface target map, attribute information of the name, type and description of the target map and structure information of organization and topological relation content of single/multiple buildings contained in the target map. The user is presented with the structural information so that the user can autonomously choose to further load the map data of the building to be presented or to further present the map data of a specific floor of the building. By giving unique target identification and target attributes containing geometric information, attribute information and traffic information to target map data in a two-dimensional map for constructing a target range, not only elements (such as buildings contained in the two-dimensional map and floors contained in the buildings) in a conventional two-dimensional map can be presented in the map presenting process, but also elements can be presented to be called and expanded, so that organization and topological relation content of single/multiple buildings contained in the target map can be obtained. Conventional two-dimensional maps do not include such expandable map elements. This provides a path for the construction of an indoor three-dimensional map.

Next, at step S320, a two-dimensional map of each individual building within the target range is constructed by the building map construction component 220, giving it a unique building identification of the individual building map data and building attributes including geometric information, attribute information, and traffic information. The map data of the two-dimensional map of each single building comprises the description of the content of the map, building identification unique to the building data, version information for determining the building structure version number and the building content version number of the map version, geometric information comprising the spatial information content such as the geometric shape and the range of the building, attribute information comprising the name, the type and the description of the building map, and structure information comprising the organization and topological relation content of a single floor or a plurality of floors contained in the building map. The user is presented with the structural information so that the user can autonomously choose to further load the map data of the specific floor of the building to be presented. By giving unique building identification and target attributes containing geometric information, attribute information and traffic information to building map data in a two-dimensional map for building, elements in a conventional two-dimensional map (such as floors contained in buildings contained in the two-dimensional map) can be presented in a map presenting process, and the attributes can be called and expanded by the elements, so that organization and topological relation content of single/multiple floors contained in the building map can be obtained. Conventional two-dimensional maps do not include such expandable map elements. This provides a path for the construction of a three-dimensional map of the building. More importantly, the two-dimensional map data of the building comprise the structural information of the building, so that a user can select the map content required by the next step according to the structural information when the map is presented, the three-dimensional building map is presented through the structural information, and the map interactive interface with the user is formed by including the selection options.

Next, at step S330, a two-dimensional map of each floor included in each individual building is constructed by the floor map construction component 230, a unique floor identification and a floor attribute including geometric information, attribute information and traffic information are given to each floor map data. The map data of the two-dimensional map of each floor comprises the content description of the map, a floor identifier unique to the floor data, version information for determining the floor structure version number and the floor content version number of the map version, geometric information comprising the spatial information content such as the geometric shape and the range of the floor, attribute information comprising the name, the type and the description of the floor map, and structure information comprising the organization and the topological relation content of single/multiple elements contained in the floor map. The user is presented with the structural information so that the user can autonomously choose to further load the map data of the specific element or the specific layer of the floor to be presented.

Finally, at step S340, a plurality of layer data of each of the target map data, the building map data, and the floor map data are constructed by the layer map construction component 240, and a unique layer identifier and a layer attribute including geometric information, attribute information, and traffic information are given to each layer data. The map data of the two-dimensional map of each layer comprises the content description of the layer, the unique building identification of the layer data, the version information used for determining the layer structure version number and the layer content version number of the map version, the geometric information of the spatial information content such as the geometric shape and the range of the layer, the unique data identification of a single element, the geometric shape content of the single element, the unit description information of the attribute information content such as the name, the type and the description of the single element. The map display is richer by displaying a plurality of layers, the information of the map can be expanded by different layers, the information can comprise commodity information of shops on specific floors and the like, and an expansion entrance is provided for commercial application of the indoor map.

Alternatively, at step S350, the target map data, the building map data, and the floor map data are stored by the map data association component 250 using the same first-level suffix file name so as to unify the formats of all the map data, and a second-level suffix file is given to a specific map data by the map level at which the map data is located, thereby determining the map level of each map data. As an example, the storage mode of all map parts is to store by using binary files, and the map parts are divided into the following parts according to the data content: structure, point element, line element, surface element. The storage file adopts a unified suffix xxx.fmap, and defines a secondary suffix name according to the file role, such as xxx.map.fmap: storing a map structure and basic information content, which are entry files loaded by the map; xxx. gene. fmap (xxx. building. fmap): storing the single building structure and the basic information content; xxx.geo.fmap: storing geometric information of points, lines and surface elements in a map or a single building according to floors; xxx, bz, fmap: storing attribute information of points, lines and surface elements in a map or a single building according to floors; xxx. navi. fmap: and storing the traffic information of points, lines and surface elements in the map or the single building according to floors.

In summary, by using the construction system and method of the indoor three-dimensional map disclosed by the present disclosure, the outdoor map and the indoor map are seamlessly connected, and an indoor three-dimensional map is formed by constructing indoor maps of all layers one by one and giving attributes to the maps of all layers, and establishing a correlation between the maps of all layers and an outdoor single building map, so that the indoor three-dimensional map has generality with the outdoor map, has necessary spatial data content, and also has basic attribute information content, and meets the requirements of various industries on the indoor map. Moreover, since the indoor map data of the present disclosure are objectively associated according to floors, the indoor three-dimensional map formed by the construction method and the construction system of the present disclosure has scalability of layers and scalability of attribute information, that is, the indoor three-dimensional map constructed by the present disclosure supports physical structure expansion of an indoor space structure, supports any number of floors, supports multi-layer expansion within a floor, and supports basic space element types: any number of points, lines and surfaces are expanded; in addition, the map element is provided with a globally unique spatial identifier, and one-to-one association binding with three-party data is supported. Moreover, aiming at the situation that indoor map data is mainly used for expressing space data information in a medium-small range and the difference between the total amount of space data in different ranges and the complexity is large, the indoor three-dimensional map construction system can provide three-dimensional map construction with flexibility for different targets, namely the three-dimensional map construction system supports map data contents of parks and single buildings in different ranges and also supports single building map data contents in different total amounts. In addition, the map data are cached and transmitted in the loading process, so that huge transmission overhead and memory space overhead are caused, the map data adopted by the indoor three-dimensional map building system disclosed by the invention are loaded on demand, the format of the map data is characterized by small transmission data volume and small storage space requirement, and the data tile loading is supported, so that the indoor three-dimensional map building system has the characteristic of high performance. More importantly, because the data format adopts a unique number, the data has definite ownership, and support is provided for data security.

The basic principles of the present disclosure have been described in connection with specific embodiments, but it should be noted that it will be understood by those skilled in the art that all or any of the steps or components of the method and apparatus of the present disclosure may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or a combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present disclosure.

Thus, the objects of the present disclosure may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. Thus, the object of the present disclosure can also be achieved merely by providing a program product containing program code for implementing the method or apparatus. That is, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future.

It is also noted that in the apparatus and methods of the present disclosure, it is apparent that individual components or steps may be disassembled and/or re-assembled. These decompositions and/or recombinations are to be considered equivalents of the present disclosure. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

The above detailed description should not be construed as limiting the scope of the disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.

Claims (12)

1. A construction method of an indoor three-dimensional map comprises the following steps:

constructing a two-dimensional map of a target range containing one or more single buildings, and endowing the two-dimensional map with a unique target identifier of target map data and target attributes containing geometric information, attribute information and traffic information;

constructing a two-dimensional map of each single building in the target range, and endowing the single building map data with a unique building identifier and building attributes comprising geometric information, attribute information and traffic information;

constructing a two-dimensional map of each floor contained in each single building, and giving a unique floor identification of each floor map data and a floor attribute containing geometric information, attribute information and traffic information; and

and constructing a plurality of layer data of each of the target map data, the building map data and the floor map data, and giving a unique layer identifier of each layer data and layer attributes including geometric information, attribute information and traffic information.

2. The construction method of the indoor three-dimensional map according to claim 1, further comprising:

attributes are assigned to the target that contain a structural description that describes the organizational and topological relationships between the building/buildings in the target.

3. The construction method of the indoor three-dimensional map according to claim 1, further comprising:

building attributes are assigned that contain a structural description that describes the organization and topological relationships between the floor/floors in the building.

4. The construction method of the indoor three-dimensional map according to claim 1, further comprising:

assigning floor attributes comprising structure descriptions, wherein the structure descriptions describe organization and topological relationships between the layer/layers in the floor.

5. The construction method of the indoor three-dimensional map according to claim 1, further comprising:

layer attributes are assigned that include an element description, wherein the element description specifies a data unique identification, geometry, type, name, and description of an element that may be in the layer.

6. The construction method of the indoor three-dimensional map according to claim 1, further comprising:

the target map data, the building map data, and the floor map data are stored using the same first-level suffix file name so as to unify the formats of all the map data, and a second-level suffix file is given to a specific map data by the map level where the map data is located, thereby determining the map level of each map data.

7. An indoor three-dimensional map construction system, comprising:

the target map construction component is used for constructing a two-dimensional map of a target range containing one or more single buildings, giving a unique target identifier to target map data of the two-dimensional map and giving target attributes containing geometric information, attribute information and traffic information;

the building map construction component is used for constructing a two-dimensional map of each single building in the target range, and endowing the single building map data with a unique building identifier and building attributes containing geometric information, attribute information and traffic information;

the floor map construction component is used for constructing a two-dimensional map of each floor contained in each single building, and endowing unique floor identification of each floor map data and floor attributes containing geometric information, attribute information and traffic information; and

and the layer map construction component is used for constructing a plurality of layer data of each of the target map data, the building map data and the floor map data, and endowing a unique layer identifier of each layer data and layer attributes including geometric information, attribute information and traffic information.

8. The building system of an indoor three-dimensional map according to claim 7, wherein the object map building component further assigns object attributes including a structural description, wherein the structural description describes the organizational and topological relationships between the building/buildings in the object.

9. The building system of an indoor three-dimensional map of claim 7, wherein the target map building component further assigns building attributes that include a structural description, wherein the structural description describes the organization and topological relationships between single/multiple floors in the building.

10. The building system of an indoor three-dimensional map of claim 7, wherein the building map building component further assigns floor attributes comprising a structural description, wherein the structural description describes the organization and topological relationships between the layer/layers in the floor.

11. The building system of an indoor three-dimensional map according to claim 7, wherein a floor map building component further assigns layer attributes including an element description, wherein the element description specifies a data unique identification, geometry, type, name, and description of an element that can be in the layer.

12. The system for constructing an indoor three-dimensional map according to claim 7, further comprising a map data association component that stores the target map data, the building map data, and the floor map data with the same first-level suffix file name so as to unify formats of all map data, and assigns a second-level suffix file to a specific map data by a map level where the map data is located, thereby determining a map level of each map data.

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