JP2011107770A - Indoor space data creation support system and indoor space data creation support method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce maintenance cost of space data used for indoor navigation. <P>SOLUTION: An indoor space data creation support system including a control part and a storage part connected to the control part holds construction drawing data of a building, and equipment data indicating shapes of figures indicating equipment included in the building. The control part specifies positions of pillars and walls included in the building based on whether or not the figures included in the construction drawing data satisfy a prescribed rule when the construction drawing data are inputted, specifies positions of the equipment included in the building by template matching using the equipment data, specifies an area surrounded by the pillars, the walls and the equipment whose positions are specified as a room, generates information wherein the room and the equipment adjacent to the room, and another room adjacent to the equipment are associated based on the specified room and positions of the equipment, and outputs the indoor space data including the generated information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a navigation technology for guiding a person or a moving body, and more particularly to a technology for creating indoor space data used for indoor navigation.

  In recent years, services such as car navigation or navigation for pedestrians using mobile phones, which perform route search using the user's position, have become widespread. The user can search for a route from the current position of the user to a desired destination by setting the destination on the in-vehicle terminal or the portable terminal. The position of the user outdoors can be measured by receiving radio waves from a GPS (Global Positioning System) satellite.

  On the other hand, a method for installing a facility for generating a signal equivalent to a GPS satellite signal inside a building, or a positioning technique using a wireless local area network (LAN) or the like has been developed in recent years. Can also measure the user's position. Therefore, in navigation for pedestrians, it is expected to provide a navigation system that guides the route to a destination in an easy-to-understand manner not only outdoors but also indoors, such as in a station yard, underground shopping center, or inside a complex building.

  For outdoor navigation, spatial data indicating the positions of roads and intersections and their connection relations is used. Similarly, in order to realize indoor navigation, it is necessary to create indoor space data indicating the connection relationship between indoor rooms. In order to reduce the maintenance cost of indoor space data, it is desirable to create indoor space data from a construction drawing of a station, an underground shopping area, a building, or the like with as little human intervention as possible.

  In Patent Document 1, a member such as a frame and joinery is recognized from plan view data of a building, and a perspective view, an elevation view, and a sectional view are based on the recognition result and the input height data of the member. Techniques for creating are disclosed.

  Patent Document 2 discloses a technique for reducing drawing input cost by recognizing a room area from a hand-drawn or printed architectural floor plan, and further automatically recognizing the meaning of the symbol and the room attribute. Yes.

  Patent Document 3 discloses a technique for automatically recognizing a door accurately from an architectural drawing.

Japanese Unexamined Patent Publication No. 7-234892 Japanese Patent Laid-Open No. 10-124547 JP-A-11-110548

  In a general outdoor navigation system, an intersection on a road network is recognized as a node, a line between nodes (that is, a road) is recognized as a link, and the connection relation between the node and the link and the cost for moving on the link are indicated. Data is used as spatial data. Therefore, if a starting point and a destination node are designated, a route can be searched using the Dijkstra method or the like. In order to realize the same navigation indoors, it is necessary to create indoor space data including information on nodes and links in the same manner as described above. If all such indoor space data is created manually, the cost becomes enormous.

  As described in Patent Documents 1 to 3, technologies for automatically recognizing the contents described in architectural drawings have been developed, but even if these are used, indoor space data used for navigation based on architectural drawings Cannot be created automatically.

  The present invention has been made in view of the above problems, and an object thereof is to realize a system that supports the creation of indoor space data based on architectural drawings.

  The present invention is an indoor space data creation support system including a control unit and a storage unit connected to the control unit, wherein the storage unit is included in the architectural drawing data of a building and the building The facility data indicating the shape of the figure indicating the facility to be stored is held, and when the architectural drawing data is input, the control unit determines whether or not the graphic included in the architectural drawing data satisfies a predetermined rule. The position of the pillar and wall included in the building is specified, the position of the facility included in the building is specified by template matching using the equipment data, and the position is specified. An area surrounded by walls and equipment is identified as a room, and based on the location of the identified room and equipment, a room, equipment adjacent to the room, and another room adjacent to the equipment, It generates response giving information, and outputs the indoor space data including the generated information.

  According to one embodiment of the present invention, it is possible to reduce the maintenance cost of indoor space data by automatically creating at least a part of indoor space data used for indoor navigation using architectural drawings. it can.

It is a block diagram which shows the structure of the indoor space data creation assistance system of embodiment of this invention. It is explanatory drawing of the representation model of indoor space data in embodiment of this invention. It is explanatory drawing of the management method of indoor space data in embodiment of this invention. It is explanatory drawing of the management method of the equipment corresponding to the link of embodiment of this invention. It is explanatory drawing of the architectural drawing data stored in the architectural drawing data storage part of embodiment of this invention. It is explanatory drawing of the graphic element data contained in the architectural drawing data of embodiment of this invention. It is explanatory drawing of the symbol data stored in the symbol data storage part of embodiment of this invention. It is explanatory drawing of the graphic data structure input from the architectural drawing data storage part of embodiment of this invention. It is explanatory drawing of the indoor space data stored in the indoor space data storage part of embodiment of this invention. It is explanatory drawing of the indoor space data stored in the indoor space data storage part of embodiment of this invention. It is explanatory drawing of the symbol data table stored in the symbol data storage part of embodiment of this invention. It is a flowchart which shows the process of the whole indoor space data creation assistance system of embodiment of this invention. It is a flowchart which shows the architectural drawing input process of embodiment of this invention. It is a flowchart which shows the drawing auxiliary element removal process of embodiment of this invention. It is explanatory drawing of the drawing auxiliary element removal process of embodiment of this invention. It is a flowchart which shows the symbol extraction process of embodiment of this invention. It is explanatory drawing of the symbol extraction process of embodiment of this invention. It is explanatory drawing of the figure which replaces the symbol data of embodiment of this invention. It is explanatory drawing of the room extraction process of embodiment of this invention. It is explanatory drawing of the topology construction process of embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an indoor space data creation support system according to an embodiment of the present invention.

  The indoor space data creation support system 100 of the present embodiment is realized by executing a program to be described later on a general computer such as a PC (Personal Computer). Specifically, the indoor space data creation support system 100 includes a control unit 110, a display unit 120, an instruction unit 130, an indoor space data storage unit 141, an architectural drawing data storage unit 142, and a symbol data storage unit 143.

  The control unit 110 corresponds to a processor of a computer and a memory connected to the processor. The control unit 110 of the present embodiment includes an architectural drawing data input unit 111, a drawing auxiliary element removal unit 112, a symbol extraction processing unit 113, a room extraction processing unit 114, a topology construction processing unit 115, and an indoor space data output unit. These correspond to programs stored in the memory and executed by the processor. Therefore, in the following description, the processing executed by each of the above units is actually executed by the control unit 110 that executes a program. The processing executed by each unit will be described later.

  The display unit 120 is a display device that is connected to the control unit 110 and displays text or drawings according to instructions from the control unit 110.

  The instruction unit 130 is an input device such as a mouse and a keyboard connected to the control unit 110.

  The indoor space data storage unit 141, the architectural drawing data storage unit 142, and the symbol data storage unit 143 are files or databases stored in a storage device such as a hard disk drive. The data stored in each part will be described later.

  FIG. 2 is an explanatory diagram of a representation model of indoor space data in the embodiment of the present invention.

  In this embodiment, a floor division model that divides and manages an indoor space for each floor is adopted. The overall shape of each floor and the shape of each room constituting each floor are represented by two-dimensional polygons. In the present embodiment, an area having an area that is partitioned by walls or the like and that constitutes each floor is referred to as a room. That is, in addition to a normal room, a hallway, a staircase, an elevator, and the like are described as a room. Each room may be divided into smaller areas and managed for each area.

  Information in the height direction of each floor is managed as an attribute such as the number of floors.

  The inter-room link displayed as a round point (or two round points and a line connecting them) in the figure is a link connecting between rooms on the floor. In other words, the opening between the rooms corresponds to the link between the rooms. This opening may be a fitting such as a door or window that can be opened and closed, or may be a simple opening that cannot be closed.

  Inter-floor links displayed as square points (or two square points and a line connecting them) in the figure are links that connect rooms belonging to different floors. In other words, the opening between floors corresponds to the link between floors. For example, an elevator or a staircase corresponds to the link between floors.

  In the example of FIG. 2, the building 200 includes four floors, that is, the first floor 210, the second floor 220, the third floor 230, and the rooftop 240. The second floor 220 (also described as the floor 220. The same applies to the other floors) includes seven rooms, that is, rooms 201 to 207. Of these, the room 204 is a corridor in contact with all other rooms. The room 206 is an elevator and corresponds to an inter-floor link described later.

  Rooms 201, 202, 203, 205, 206 and 207 are connected to room 204 by inter-room links 261, 262, 263, 264, 265 and 266, respectively. These inter-room links 261 to 266 are doors connecting, for example, a room and a hallway or an elevator and a hallway.

  The room 106 on the first floor 210 is connected to the room 206 on the second floor 220 via the inter-floor link 271. The room 206 on the second floor 220 is connected to the room 306 on the third floor 230 via an inter-floor link 272. The room 306 on the third floor 230 is connected to the room 406 on the rooftop 240 via the inter-floor link 273. These inter-floor links 271 to 273 are elevators that connect floors. Rooms 106, 206, 306 and 406 are rooms corresponding to elevators on the respective floors.

  Although omitted in FIG. 2, there are actually indoor / outdoor links (for example, doors or windows leading from the room to the outside) that connect the room and the outdoors.

  FIG. 3 is an explanatory diagram of the indoor space data management method according to the embodiment of the present invention.

  The indoor space data of the present embodiment can represent a topology such as a space inclusion relationship and a connection relationship. Specifically, the inclusion relationship is expressed by hierarchically managing facilities (buildings), floors, and rooms. A connection relationship is expressed by a network in which rooms are nodes and openings between rooms are links.

  FIG. 3A is an explanatory diagram of the inclusion relationship. The building 200 (Building A) includes a floor 210 (Floor 1), a floor 220 (Floor 2), a floor 230 (Floor 3), and the like. The floor 220 includes a room 201 (Room 201), a room 202 (Room 202), a room 203 (Room 203), a room 204 (Room 204), and the like. These inclusion relationships correspond to those displayed in FIG. However, illustration of the room 205 (Room205) etc. is abbreviate | omitted in Fig.3 (a). In addition, the characters described in the ellipses in FIG. 3A and FIG. 3B described later (that is, the characters in the parentheses above) are identifiers of buildings, floors, and rooms managed by the indoor space data. .

  FIG. 3B is an explanatory diagram of the connection relationship. The room 201 (Room201), the room 202 (Room202), the room 203 (Room203), the room 205 (Room205), the room 206 (Room206), and the room 207 (Room207) are inter-room links 261, 262, 263, 264, respectively. It connects with the room 204 (Room204) via 265 and 266. The room 206 is connected to the room 106 (Room 106) via the inter-floor link 271 and to the room 306 (Room 106) via the inter-floor link 272, respectively. The room 106 is a room corresponding to an elevator on the floor 210, and the room 306 is a room corresponding to an elevator on the floor 230. These connection relationships correspond to those displayed in FIG.

  In addition, although omitted in FIG. 3, there are actually indoor and outdoor links connecting the room and the outdoors.

  The format of the indoor space data describing the inclusion relation and the connection relation as described above will be described later (see FIGS. 9 and 10).

  FIG. 4 is an explanatory diagram of a facility management method corresponding to the link according to the embodiment of this invention.

  In this embodiment, the equipment installed indoors is roughly classified into joinery and stairs.

  Joinery is equipment installed in openings between rooms, such as doors or windows. Joinery is managed in association with an inter-room link or an indoor / outdoor link. The entrance door is an indoor / outdoor link connecting the room (entrance) and the outside. The window facing the outside is an indoor / outdoor link, but is expressed as an impassable link.

  Stairs are facilities that connect floors. In this embodiment, in addition to normal stairs, elevators and the like are also classified as stairs. Stairs are managed in association with inter-floor links.

  For example, when the door 401 is installed between the room 201 and the room 204, the door 401 is managed in association with the inter-room link 261 connecting the room 201 and the room 204 (FIG. 4A). reference).

  On the other hand, when the room 206 and the room 106 are connected by the stairs 411, the stairs 411 are managed in association with the inter-floor link 271 that connects the room 206 and the room 106 (see FIG. 4B). .

  As shown in FIG. 4B, the staircase (elevator in the example of FIG. 2) 411 is treated as a facility for connecting floors (that is, corresponding to the inter-floor link 271). The space occupied by is treated as rooms 106 and 206 (ie, nodes).

  The format of the indoor space data describing the above correspondence will be described later (see FIG. 10).

  FIG. 5 is an explanatory diagram of architectural drawing data stored in the architectural drawing data storage unit 142 according to the embodiment of this invention.

  FIG. 5 is an example of two-dimensional CAD (Computer Aided Design) plan view data for architecture. For example, such architectural drawing data is input to the indoor space data creation support system of the present embodiment. In the following, an architectural CAD that is currently in widespread use will be described as an example. However, the present embodiment can also be applied to CAD drawings (for example, three-dimensional CAD drawings) having specifications different from those described below. .

  In the example of FIG. 5, the plan view is divided for each floor, and data is created so that one drawing becomes one file. Symbols of building elements (for example, columns, walls, doors, etc.) may be input as a set of independent line segments or may be input as polygons. Symbols for equipment such as doors, windows, and elevators are defined in JIS standards. Although one drawing may include a plurality of layers, the layers are not necessarily classified for each type of building element.

  The drawing includes drawing auxiliary elements, that is, reference lines and dimension lines that do not exist in the actual building.

  FIG. 5 is an example of a CAD drawing of the floor 220 in FIG. That is, the floor 220 includes rooms 201, 202, 203, 204, 205, 206 and 207. Each room is surrounded by a wall (for example, the wall 551), a column (for example, the column 541), a window (for example, the window 511), a door (for example, the door 401), and the like. Doors 401, 402, 403, 404, and 405 correspond to the inter-room links 261, 262, 263, 264, and 266, respectively. An opening 505 in the wall surrounding the room (elevator) 206 corresponds to the inter-room link 265.

  In the rooms 201, 202, 203, 205 and 207, windows 511, 512, 513, 514 and 515 facing the outdoors are installed, respectively. These windows are openings connected to the outside, but the user cannot pass through them.

  The drawing of FIG. 5 further includes drawing aid elements such as dimension line 521 and reference line 531. Character information (“4,000” and “2,000” in the example of FIG. 5) such as the drawing title 561 and the dimension 571 shown in FIG. 5 is also a drawing auxiliary element. The drawing title 561 includes, for example, a building name, a floor name, a scale, and the like. Although omitted in FIG. 5, when a drawing frame is included in the drawing, the drawing frame is also a drawing auxiliary element.

  FIG. 6 is an explanatory diagram of graphic element data included in the architectural drawing data according to the embodiment of the present invention.

  The point (Point) 601 is expressed by point coordinates (x, y) (see FIG. 6A).

  A circle (Circle) 602 is represented by center point coordinates (x, y) and a radius r (see FIG. 6B).

  The arc (Arc) 603 is represented by center point coordinates (x, y), radius r, arc start angle θ1, and arc end angle θ2 (see FIG. 6C).

  The line segment (Line) 604 is expressed by the start point coordinates (x1, y1) and the end point coordinates (x2, y2) (see FIG. 6D).

  The polyline 605 is expressed by a coordinate sequence (x1, y1), (x2, y2), (x3, y3),... Of the line segment constituting the polyline 605 (FIG. 6 ( e)).

  A polygon (Polygon) 606 is expressed by coordinate sequences (x1, y1), (x2, y2), (x3, y3),... (See FIG. 6F).

  The polygon may be expressed by a polyline and a flag indicating that the polyline is closed. Alternatively, the polygon and the polyline may be expressed as a set of line segments.

  FIG. 7 is an explanatory diagram of symbol data stored in the symbol data storage unit 143 according to the embodiment of this invention.

  FIG. 7 includes a double door 710 (FIG. 7A), a single door 720 (FIG. 7B), a sliding door 730 (FIG. 7C), and a double window 740 (FIG. 7D). The example of the symbol data of the sliding window 750 (FIG.7 (e)) and the elevator 760 (FIG.7 (f)) is shown. These are expressed by a combination of graphic element data shown in FIG. For example, the double door 710 is expressed by a combination of an arc 711, an arc 712, a line segment 713, and a line segment 714. The format of the symbol data stored in the symbol data storage unit 143 will be described later with reference to FIG.

  FIG. 7 is merely a representative example, and the symbol data storage unit 143 may store more symbol data of building elements.

  Symbols for equipment such as doors, windows, and elevators shown in FIG. 7 are defined by JIS (Japanese Industrial Standards). This embodiment shows an example in which an architectural drawing including symbols conforming to JIS is input. However, even if an architectural drawing including a symbol that does not conform to JIS is input, the present invention can be realized if graphic element data of such a symbol is stored in the symbol data storage unit 143. .

  FIG. 8 is an explanatory diagram of a graphic data structure input from the architectural drawing data storage unit 142 according to the embodiment of this invention.

  For example, when the user designates a building from which indoor space data is to be created, graphic data of the architectural drawing of the designated building is read from a file stored in the architectural drawing data storage unit 142 and the like, and the control unit 110. (See step 1201 in FIG. 12 described later). FIG. 8 is an example of graphic data input in this way.

  The graphic data 800 shown in FIG. 8 includes a graphic ID 801, a layer name 802, a graphic type 803, and a graphic parameter 804.

  The graphic ID 801 is an identifier of each graphic included in the graphic data 800.

  The layer name 802 is the number of the layer on which each figure is drawn.

  The figure type 803 represents the type of each figure. This type corresponds to the type of graphic element shown in FIG.

  The figure parameter 804 is a parameter for expressing each figure. This parameter corresponds to the coordinates, radius, angle, etc. for expressing the graphic element shown in FIG. As shown in FIG. 6, the type and number of necessary parameters differ depending on the type of figure.

  When the graphic data 800 is input, the control unit 110 creates and outputs indoor space data by executing processing shown in FIG. The output data is stored in the indoor space data storage unit 141.

  9 and 10 are explanatory diagrams of indoor space data stored in the indoor space data storage unit 141 according to the embodiment of this invention.

  FIG. 9A is an explanatory diagram of building data (building management table 900) included in indoor space data.

  The building management table 900 includes a building ID 901, a building name 902, and a geometry 903.

  The building ID 901 is an identifier of each building. For example, the identifier “Building A” of the building 200 is stored as the building ID 901 corresponding to the building 200.

  The building name 902 is the name of each building.

  The geometry 903 is information indicating the overall shape and position of each building.

  FIG. 9B is an explanatory diagram of the floor data (floor management table 920) included in the indoor space data.

  The floor management table 920 includes a floor ID 921, a floor name 922, a geometry 923, a floor number 924, and a building ID 925.

  The floor ID 921 is an identifier of each floor in the building. For example, the identifier “Floor2” of the floor 220 is stored as the floor ID 921 corresponding to the floor 220.

  The floor name 922 is the name of each floor. For example, when the floor 220 is the second floor, “2F” is stored as the floor name 922 corresponding to the floor 220.

  The geometry 923 is information indicating the overall shape and position of each floor.

  The floor number 924 indicates the number of floors on each floor. For example, when the floor 220 is the second floor, “2” is stored as the floor number 924 corresponding to the floor 220.

  The building ID 925 is an identifier of a building that includes each floor. For example, when the floor 220 is the second floor of the building 200, the identifier “Building A” of the building 200 is stored as the building ID 925 corresponding to the floor 220.

  FIG. 9C is an explanatory diagram of room data (room management table 940) included in the indoor space data.

  The room management table 940 includes a room ID 941, a room name 942, a room type 943, a geometry 944, a building ID 945, and a floor ID 946.

  The room ID 941 is an identifier of each room on the floor. For example, the identifier “Room 203” of the room 203 is stored as the room ID 941 corresponding to the room 203.

  The room name 942 is the name of each room.

  The room type 943 is information indicating the type of each room, for example, whether each room is a normal room, a hallway, a staircase, or an elevator.

  The geometry 944 is information indicating the shape and position of each room.

  The building ID 945 is an identifier of a building that includes each room.

  The floor ID 946 is an identifier of a floor that includes each room.

  For example, when the room 203 is on the floor 220 of the building 200, the identifier “Building A” of the building 200 and the identifier “Floor2” of the floor 220 are stored as a building ID 945 and a floor ID 946 corresponding to the room 203, respectively.

  By the building IDs 925 and 945 and the floor ID 946, the inclusion relationship between the building, the floor, and the room as shown in FIG.

  Note that the geometries 903, 923, and 944 are expressed by, for example, the graphic elements shown in FIG. That is, as the geometry 903 and the like, a value indicating the type of figure (for example, “polygon”) and a parameter indicating the position (for example, a coordinate string) are stored. These values may actually be stored in binary format.

  FIG. 10A is an explanatory diagram of the link data 1000 included in the indoor space data.

  The link data 1000 includes a link ID 1001, a room ID 1 — 1002, a room ID 2 — 1003, a link type 1004, a facility ID 1005, a flag 1006, and a cost 1007.

  The link ID 1001 is an identifier of each link extracted by the topology construction process described later.

  Room ID1_1002 and room ID2_1003 are a room identifier corresponding to the start point node of each link and a room identifier corresponding to the end point node. However, since the start point or end point of the indoor / outdoor link is an outdoor node, the room ID2_1003 of the indoor / outdoor link is read as the outdoor ID 1003. In the example of FIG. 10A, “Outdoor001” is an identifier of a node of an outdoor network (for example, a road), and “Outdoor” is a node indicating the overall outdoor space.

  A connection relationship as shown in FIG. 3B is expressed by a combination of the room ID 1_1002 and the room ID 2_1003.

  The link type 1004 is information indicating the type of each link, for example, whether each link is an inter-room link, an inter-floor link, or an indoor / outdoor link.

  The equipment ID 1005 is an identifier of equipment (for example, joinery or stairs) associated with each link. The association between the equipment and the link will be described later with reference to FIG.

  A flag 1006 indicates whether the user can pass through each link. For example, the link flag 1006 associated with a door through which the user can pass is “true”, and the link flag 1006 associated with a window through which the user cannot pass is “false”.

  The cost 1007 is the cost of each link that is referred to in the route search. The cost 1007 of the impassable link is the maximum value that can be set (“max value” in FIG. 10A).

  By such link data 1000, a network including nodes (rooms) and links (for example, equipment such as doors) connecting the nodes is expressed. By referring to the link data 1000 and using a known algorithm such as the Dijkstra method, a route from the current location (or designated departure location) to the destination can be searched.

  FIG. 10B is an explanatory diagram of the equipment table 1020 included in the indoor space data.

  The equipment table 1020 includes equipment ID 1021, link ID 1022, equipment classification 1023, equipment type 1024, symbol ID 1025, geometry 1026, width / height 1027, and the like.

  The facility ID 1021 is an identifier of each facility.

  The link ID 1022 is a link identifier associated with each facility.

  The facility classification 1023 is information indicating whether each facility is a joinery or a staircase.

  The facility type 1024 is information indicating a detailed type of each facility, for example, whether each facility is a double door, a sliding window, or an elevator.

  The symbol ID 1025 is an identifier of a symbol used for displaying each facility on the architectural drawing.

  The geometry 1026 is information indicating the shape and position of each facility. This information may be in a format similar to geometry 903, 923, and 944.

  The width / height 1027 is information indicating the width and height of the opening of each facility. This information is not indispensable for guiding humans, but such information is stored to determine whether or not an article can be carried in an application such as searching for an article carry-in route. Is desirable.

  For example, referring to FIGS. 10A and 10B, the link ID “L001” is assigned to the inter-room link 261 that connects the room 201 and the room 204. This inter-room link 261 is associated with the facility identified by the facility ID “E001”. The facility identified by the facility ID “E001” is a double door, and this double door is represented by a symbol identified by the symbol ID “S001”. The user can pass through the double door, and the cost is “10”.

  FIG. 11 is an explanatory diagram of the symbol data table 1100 stored in the symbol data storage unit 143 according to the embodiment of this invention.

  The symbol data table 1100 includes graphic data of symbols displayed on architectural drawings to represent facilities and the like included in the building. This data is used as a template at the time of template matching in a symbol extraction process described later (see FIG. 16).

  The symbol data table 1100 includes a symbol ID 1101, an equipment classification 1102, an equipment type 1103, a graphic element set 1104, and a replacement graphic 1105.

  The symbol ID 1101 is an identifier of each symbol.

  The equipment classification 1102 is information indicating the equipment classification represented by each symbol. For example, the facility classification 1102 indicates whether the facility represented by each symbol is classified as a joinery or a staircase.

  The equipment type 1103 is information indicating the type of equipment represented by each symbol. For example, the equipment type 1103 indicates whether the equipment represented by each symbol is a double door, a single door, a sliding door, a double door, a sliding window, or an elevator.

  The graphic element set 1104 is information for specifying a graphic element set representing each symbol (that is, a combination of graphic elements described with reference to FIG. 6). For example, the double door is represented by two arcs and two line segments as shown in FIG. In this case, graphic element data (see FIG. 6) representing two arcs and two line segments is stored as a graphic element set 1104 corresponding to the value “double door” of the equipment type 1103.

  The replacement graphic 1105 is information for specifying a graphic for replacing the graphic of each symbol. The graphic replacement will be described later (see step 1607 in FIG. 16). In the example of FIG. 11, all symbol figures are replaced with predetermined polygons.

  FIG. 12 is a flowchart showing processing of the entire indoor space data creation support system according to the embodiment of the present invention.

  When the process is started, first, the architectural drawing data input unit 111 inputs architectural drawing data (step 1201). Details of this processing will be described later with reference to FIG.

  Next, the drawing auxiliary element removing unit 112 removes the drawing auxiliary element (step 1202). Details of this processing will be described later with reference to FIGS.

  Next, the symbol extraction processing unit 113 extracts symbols (step 1203). Details of this processing will be described later with reference to FIGS. 16, 17, and 18.

  Next, the room extraction processing unit 114 extracts a room (step 1204). Details of this processing will be described later with reference to FIG.

  Next, the topology construction processing unit 115 constructs a topology (step 1205). Details of this processing will be described later with reference to FIG.

  Finally, the indoor space data output unit 116 outputs the indoor space data (step 1206). As a result, the indoor space data shown in FIGS. 9 and 10 is output and stored in the indoor space data storage unit 141.

  This completes the processing of the entire indoor space data creation support system.

  FIG. 13 is a flowchart showing architectural drawing data input processing according to the embodiment of the present invention.

  The architectural drawing data input process is executed in step 1201 of FIG.

  When the architectural drawing data input process is started, the architectural drawing data input unit 111 determines whether or not to newly register a building from which indoor space data is to be created (step 1301). For example, the architectural drawing data input unit 111 may display a screen for inquiring whether or not to newly register a building on the display unit 120. The user refers to the screen and inputs information for instructing whether or not to newly register a building to the instruction unit 130. The architectural drawing data input unit 111 determines whether or not to newly register a building according to the input information.

  For example, when an indoor space data is to be created for a building for which indoor space data has not yet been created, the user inputs information instructing to newly register the building. On the other hand, for example, a part of indoor space data (for example, indoor space data of some floors) that has already been created and stored in the indoor space data storage unit 141 is newly used. The user inputs information instructing not to newly register the building.

  When it is determined that the building is newly registered, the architectural drawing data input unit 111 newly registers the building (step 1302). At this time, the architectural drawing data input unit 111 displays a new building registration screen 1303 on the display unit 120 (step 1303). This screen includes at least a display prompting the user to input the name of a newly registered building. The user inputs the name of the newly registered building in the instruction unit 130. The architectural drawing data input unit 111 receives the name of the building input from the instruction unit 130 (step 1304).

  On the other hand, when it is determined not to newly register a building, the architectural drawing data input unit 111 displays a list of buildings already registered on the display unit 120 (step 1305). The user refers to this list and uses the instruction unit 130 to select a building to which indoor space data is to be added. The architectural drawing data input unit 111 receives a selection result from the instruction unit 130 (step 1306).

  When step 1304 or step 1306 ends, the architectural drawing data input unit 111 causes the display unit 120 to display an architectural drawing file input screen (step 1307). The user refers to the architectural drawing file input screen and inputs an instruction of the architectural drawing file to the instruction unit 130. The architectural drawing data input unit 111 receives an instruction from the user from the instruction unit 130 (step 1308).

  The architectural drawing data input unit 111 reads the data included in the instructed architectural drawing file from the architectural drawing data storage unit 142 and inputs the data to the control unit 110 (step 1309). FIG. 8 is an example of the contents of the architectural drawing data input in step 1309.

  Next, details of the drawing assisting element removal processing executed in step 1202 of FIG. 12 will be described with reference to FIGS. 14 and 15.

  FIG. 14 is a flowchart showing a drawing assisting element removal process according to the embodiment of this invention.

  FIG. 15 is an explanatory diagram of the drawing assisting element removal processing according to the embodiment of this invention.

  When the drawing auxiliary element removal process is started, the architectural drawing data input in step 1309 is held in the control unit 110. FIG. 15A shows an example of an architectural drawing created using the inputted architectural drawing data. This architectural drawing is the drawing of the floor 220 shown in FIG. Actually, the architectural drawing data is input in a format as shown in FIG. 8, but the data includes all the information necessary for creating the architectural drawing shown in FIG.

  When the drawing auxiliary element removing process is started, the drawing auxiliary element removing unit 112 extracts a wall area and a column area included in the architectural drawing (step 1401). Specifically, the drawing auxiliary element removing unit 112 extracts the wall region and the column region based on whether a line or a graphic included in the architectural drawing satisfies a predetermined condition. For example, the drawing assisting element removing unit 112 extracts parallel lines from the architectural drawing, and determines that the parallel lines are walls if the interval between the parallel lines is within a predetermined threshold. Further, the drawing assisting element removing unit 112 extracts a region (graphic) adjacent to the wall from the region other than the wall extracted as described above, and if the area of the region is within a predetermined threshold, the region Is determined to be a pillar.

  For example, a wall 551 shown in FIG. 15A is extracted as a wall, and a column 541 is extracted as a column. FIG. 15B shows the wall extracted in step 1401 with a thick solid line, and the extracted column with a square filled with black.

  Next, the drawing assisting element removing unit 112 extracts the outer shape of the building based on the extraction result of Step 1401 (Step 1402). Specifically, the drawing assisting element removing unit 112 extracts the outline of the area surrounded by the walls and pillars extracted in step 1401 as the outline (contour) of the building. For example, the hatched area in FIG. 15B is an area surrounded by the extracted walls and pillars. Therefore, the outline of this area is extracted as the outline of the building.

  Information (eg, graphic type such as “Polygon” and graphic parameters such as coordinate values) representing the shape and position of the external shape of the building extracted in this way is the geometry 903 and floor management table of the building management table 900. Stored as 920 geometry 923. The building ID 901 and the floor ID 921 may be automatically given by the control unit 110. Since these IDs only need to be unique within the table, any value not yet registered in each table can be given as the ID. The building name 902, the floor name 922, the floor number 924, and the building ID 925 may be input by the user.

  Next, the drawing auxiliary element removal unit 112 extracts drawing auxiliary elements based on the extraction result of step 1402 (step 1403). Specifically, the drawing auxiliary element removing unit 112 determines that the graphic protruding from the outer shape of the building extracted in step 1402 (that is, located outside the building) is the drawing auxiliary element.

  FIG. 15C is a drawing in which the outline of the building shown in FIG. 15B is superimposed on the drawing of FIG. In this example, figures protruding from the outer shape of the building are a dimension line 521, a reference line 531, a dimension 571, a drawing title 561, and the like. If only a part of the reference line 531 protrudes from the outer shape of the building, it is determined that the figure protrudes from the outer shape of the building.

  Next, the drawing auxiliary element removing unit 112 causes the display unit 120 to display a screen for confirming deletion of the drawing auxiliary element extracted in step 1403 (step 1404). For example, as shown in FIG. 15D, a screen including the dimension line 521, the reference line 531, the dimension 571 and the drawing title 561 extracted in step 1403 is displayed. Further, a message asking the user whether or not to delete these drawing assisting elements may be displayed.

  Next, the drawing auxiliary element removing unit 112 determines whether or not the extracted drawing auxiliary element may be deleted (step 1405). For example, when the user inputs an instruction to permit the deletion of the drawing auxiliary element to the instruction unit 130, it is determined that the drawing auxiliary element may be deleted.

  If it is not determined that the drawing auxiliary element can be deleted, the drawing auxiliary element removing unit 112 selects a drawing auxiliary element extracted in step 1403 that is not to be deleted (step 1406), and the process returns to step 1404. . For example, in step 1403, a column or wall that is not originally a drawing auxiliary element (that is, should not be deleted) may be erroneously extracted as a drawing auxiliary element. In such a case, the user refers to the confirmation screen displayed in step 1404 and designates a graphic that should not be deleted. In this case, the drawing assisting element removing unit 112 selects the designated graphic as a graphic not to be deleted.

  Since the graphic selected in step 1406 is excluded from the drawing auxiliary element to be deleted, it is not displayed on the confirmation screen in the next step 1404.

  If it is determined in step 1405 that the drawing auxiliary element may be deleted, the drawing auxiliary element removing unit 112 deletes the extracted drawing auxiliary element (step 1407). Specifically, the drawing auxiliary element removing unit 112 deletes data corresponding to the extracted drawing auxiliary element from the input data (see FIG. 8). The drawing auxiliary element removal process is thus completed.

  Actually, there are cases where not all drawing auxiliary elements can be removed by the above processing. For example, the drawing auxiliary element that does not protrude from the outer shape of the building extracted in step 1402 cannot be removed by the above processing. In such a case, the user needs to manually remove the remaining drawing auxiliary elements while referring to the drawings. However, since many of the drawing assisting elements are usually removed by the above processing, the work burden on the user is reduced.

  The drawing auxiliary element may cause erroneous extraction of symbols in the next symbol extraction process (step 1203). By removing the drawing auxiliary element in advance as described above, it is possible to reduce erroneous symbol extraction.

  Next, the details of the symbol extraction process executed in step 1203 of FIG. 12 will be described.

  FIG. 16 is a flowchart showing symbol extraction processing according to the embodiment of the present invention.

  When the symbol extraction process is started, the control unit 110 holds the architectural drawing in which the drawing auxiliary element is deleted in step 1407. The symbol extraction processing unit 113 first searches for symbol data stored in the symbol data storage unit 143 (step 1601). Specifically, the symbol extraction processing unit 113 searches the symbol data table 1100 shown in FIG. 11 and determines whether there is a symbol that has not yet been extracted (step 1602).

  If it is determined in step 1602 that there is a symbol that has not yet been extracted, the symbol is extracted from the architectural drawing (step 1603). This extraction can be performed by a conventionally known method such as template matching using a graphic element set read from the symbol data table 1100 as a template.

  Next, the symbol extraction processing unit 113 displays the extraction result in step 1603 on the display unit 120 (step 1604). Further, a message requesting confirmation of the extraction result may be displayed.

  The user refers to the screen displayed in step 1604 to determine whether or not the extraction result is correct, and inputs the determination result to the instruction unit 130. The symbol extraction processing unit 113 determines whether the extraction result is correct based on the input to the instruction unit 130 (step 1605).

  When it is determined that the extraction result is correct, the symbol extraction processing unit 113 replaces the graphic of the extracted symbol with a predetermined graphic (step 1607).

  On the other hand, when the extraction result is not correct, the user inputs information for correcting the extraction result. In this case, the symbol extraction processing unit 113 determines in step 1605 that the extraction result is not correct, and corrects the extraction result according to the input from the user (step 1606). Thereafter, the symbol extraction processing unit 113 replaces the extracted symbol graphic with a predetermined graphic according to the correction result (step 1607).

  The symbol extraction processing unit 113 repeatedly executes the processing from step 1601 to step 1607 until extraction of all symbols registered in the symbol data table 1100 is completed.

  A specific example of the above processing will be described with reference to FIGS.

  FIG. 17 is an explanatory diagram of symbol extraction processing according to the embodiment of this invention.

  For example, the symbol extraction processing unit 113 searches the symbol data table 1100 (step 1601), and when it is determined that the double door has not yet been extracted (step 1602), executes the process of extracting the double door (step 1602). 1603). At this time, the symbol extraction processing unit 113 uses the value of the graphic element set 1104 corresponding to the double door as a template to extract the double door included in the architectural drawing by template matching. FIG. 17A shows the double doors 401 to 405 (within dotted lines) extracted in this way. For example, a drawing in which the symbol thus extracted is surrounded by a dotted line may be displayed in step 1604.

  The user refers to the displayed drawing and confirms whether or not the double door is correctly extracted (step 1605). For example, if a figure that is not a double door is mistakenly extracted as a double door, or a double door is not extracted, information for correcting these errors is input (step 1606).

  Thereafter, the symbol extraction processing unit 113 replaces the extracted symbol of the double door 401 with a graphic defined by the replacement graphic 1105 corresponding to the double door (step 1607). For example, as the geometry 1026 of the equipment table 1020 corresponding to the double door 401, a parameter determined by the double door replacement graphic 1105 is stored. Although omitted in FIG. 10B, the geometry 1026 includes coordinate values indicating the position and shape of the graphic in addition to information indicating the type of graphic (for example, “Polygon”).

  At this time, the equipment ID 1021 (for example, “E001”) and the link ID 1022 (for example, “L001”) corresponding to the extracted double door 401 may be automatically generated and stored in the equipment table 1020. Since these IDs only need to be unique in the table, any value not yet registered in the table can be given as the ID. On the other hand, the symbol ID 1101, equipment classification 1102 and equipment classification 1103 values used as templates are stored as the symbol ID 1025, equipment classification 1023 and equipment classification 1024 corresponding to the extracted double door 401. The width / height 1027 may be input by the user.

  Similar to the above, the double doors 402 to 405 are also replaced in step 1607.

  In the example of FIG. 17, replacement figures corresponding to fittings such as doors and windows are rectangles 1701 to 1705 filled in black. An example of the replacement graphic will be described later with reference to FIG. FIG. 17B shows an example of the architectural drawing after the double door is replaced.

  The same processing as described above is repeatedly executed until the processing is completed for all equipment symbols. In the example of FIG. 17, the sliding windows 511 to 515 are further extracted and replaced with predetermined graphics 1711 to 1715. Further, the elevator 206 is extracted and replaced with a predetermined figure. FIG. 17C shows an example of an architectural drawing in which symbols for all facilities are replaced. In this example, the elevator 206 is replaced with a hatched square 1721. It should be noted that the elevator symbol is preferably replaced with a larger figure so that a gap between the elevator and the surrounding wall is filled in the drawing.

  FIG. 18 is an explanatory diagram of a graphic for replacing the symbol data according to the embodiment of this invention.

  In this embodiment, fittings such as a double door, a single door, a sliding door, a double door, and a sliding window are replaced with hatched rectangles 1801 to 1805 shown in FIGS. 18 (a) to 18 (e), respectively. Is done. The replacement figure 1801 of the double door corresponds to the replacement figures 1701 to 1705 in FIGS. 17B and 17C. The replacement graphic 1805 of the sliding window corresponds to the replacement graphic 1711 to 1715 of FIG. These rectangles correspond to the rectangles painted in black in FIGS. 17B and 17C.

  In addition, the dotted line shown to Fig.18 (a), FIG.18 (b), and FIG.18 (d) shows the symbol before replacement. The door and window symbols shown in these figures are replaced so that the position of the closed door and window and the position of the replacement figure overlap. The symbols of the sliding door and the sliding window are replaced so that the contour of the sliding door and the contour of the replacement figure overlap (FIGS. 18C and 18E).

  As shown in FIG. 17C, the elevator symbol is replaced with a larger square 1806 (FIG. 18F). This elevator replacement figure 1806 corresponds to the replacement figure 1721 of FIG.

  Information indicating the shape and the like of the above replacement figures 1801 to 1806 is stored as the replacement figure 1105 of the symbol data table 1100.

  FIG. 19 is an explanatory diagram of the room extraction process (step 1204) according to the embodiment of this invention.

  FIG. 19A is an architectural drawing held in the control unit 110 when the room extraction process (step 1204) is started. This is the same as FIG. The room extraction processing unit 114 extracts a room from the architectural drawing of FIG. Specifically, the room extraction processing unit 114 determines the walls, columns, and columns based on the wall and column geometry extracted in step 1401 in FIG. 14 and the geometry of the figure replaced in step 1607 in FIG. The area surrounded by the replacement figure is extracted as a room.

  For example, the room extraction processing unit 114 extracts a room 201 surrounded by a replacement graphic 1711 and a replacement graphic 1701 such as a wall 551 and a column 541. Similarly, the rooms 202 to 205 and 207 are also extracted. FIG. 19B shows the extracted rooms 201 to 205 and 207.

  The geometry of each room extracted in this way is stored as the geometry 944 of the room management table 940. On the other hand, the room ID 941 corresponding to each extracted room may be automatically generated. Since this ID only needs to be unique in the room management table 940, a value not yet registered in the room management table 940 can be automatically generated as the room ID 941. The room name 942, the room type 943, the building ID 945, and the floor ID 946 corresponding to each room may be input by the user.

  Note that the room name 942 may be presented to indoor navigation users as a starting point or destination and may be presented as information for guiding the user. The name should be easy to understand. The same applies to the building name 902 and floor name 922 already described.

  As described with reference to FIG. 17 (c), when the symbol of the elevator 206 is replaced with a larger graphic 1721, the gap between the wall around the elevator and the elevator is filled, so that the elevator portion is The area of the excluded corridor is detected as the room 204. In this case, since the elevator 206 cannot be extracted as a room according to the above-described room extraction rule, the user needs to manually cause the control unit 110 to recognize the elevator 206 as a room. Specifically, the user inputs information related to the room corresponding to the elevator 206 to the room management table 940 (see the room ID “Room206” in FIG. 9C), and further, the equipment related to the elevator 206 and its Information on the link corresponding to the facility is input to the link data 1000 and the facility table 1020. However, with the exception of this, many rooms are automatically extracted, reducing the work burden on the user.

  Note that FIG. 19B is simplified for the sake of explanation, but actually, the column and wall regions are not included in the room.

  FIG. 20 is an explanatory diagram of the topology construction processing (step 1205) according to the embodiment of this invention.

  The topology construction processing unit 115 receives the room geometry 944 extracted by the room extraction process (step 1204) and the figure geometry 1026 replaced by the step 1607 in FIG. 16 (FIG. 20A). See), a facility in contact with each room (eg, a fitting such as a door), and another room in contact with the facility.

  For example, the figure 1701 (that is, the double door 401) is in contact with the room 201, and the room 204 is in contact with the double door 401. In this case, the topology construction processing unit 115 recognizes the double door 401 as a link 261 that connects the room 201 and the room 204, and stores information related to the link 261 in the link data 1000.

  Specifically, the identifiers of the room 201 and the room 204 are stored in the room ID1_1002 and the room ID2_1003 corresponding to the link ID “L001” (see the equipment table 1020) of the double door 401, respectively. The value of the facility ID 1005 is the same as that of the facility ID 1021. By referring to the room management table 940, it can be seen that the room 201 and the room 204 are included in the same floor, and therefore information indicating that the link 261 is an inter-room link is stored as the link type 1004. The flag 1006 and the cost 1007 may be input by the user.

  Similarly, information regarding the links 262 to 264 and 266 between the rooms is stored in the link data 1000. Furthermore, information regarding the links 2001 to 2005 between each room and the outdoors is also stored in the link data 1000 (for example, corresponding to the link ID “L102”).

  FIG. 20B shows the connection relationship between the rooms and links specified in this way (that is, the result of topology construction). This connection relationship corresponds to FIG. However, in FIG. 3B, the link between each room and the outdoors is omitted.

  In FIG. 20, since the elevator is not recognized as a room, information about the room 206 corresponding to the elevator and a link connected to the room 206 is not automatically generated. In this case, the user needs to manually input information regarding the room 206, the inter-room link 265 connecting the room 206 and the room 204, and the inter-floor links 271 and 272 connecting the room 206, the room 106, and the room 306. . However, with the exception of the above exception, many links connecting the rooms are automatically extracted, reducing the work burden on the user.

  The indoor space data shown in FIGS. 9 and 10 is completed by the topology construction process (step 1205) described above, is output from the control unit 110 in the next step 1206, and is stored in the indoor space data storage unit 141. Indoor navigation can be realized using the indoor space data.

  For example, an indoor navigation system (not shown) uses a method similar to that of a conventional in-vehicle navigation system with reference to the link data 1000 when a room for a departure place and a room for a destination are designated by a user. The route from the starting point to the destination can be searched.

  When the user of the indoor navigation system is a human, the indoor navigation system may be able to guide the user to the destination without using the location information of the room and equipment. For example, the indoor navigation system may guide the user to the destination by sequentially providing the user with information (for example, their names) identifying a room or a door on the searched route. In such a case, the indoor space data may not necessarily include the geometries 944 and 1026. That is, in such a case, the geometries 944 and 1026 may not be output in step 1206.

  On the other hand, if the indoor space data includes geometries 944 and 1026, the indoor navigation system can use the position information of the room and equipment to guide the user more precisely. In particular, when the user is not a human being, for example, an automatic transport device, it is necessary to guide the device to a door or the like leading to the next room on the route, so position information such as geometry 944 and 1026 is essential. is there.

  In the above description, two-dimensional CAD plan view data has been used as an example. However, embodiments of the present invention are not limited to two-dimensional CAD drawings. As architectural drawing data, three-dimensional CAD drawing data that has begun to spread in the recent architectural field, or virtual city data used in the GIS (Geographic Information System) field may be used as an input. As an example of 3D CAD drawing data, there is a specification called IFC (Industry Foundation Classes) that is being standardized by IAI (International Alliance for Interoperability). Also, as an example of virtual city data, there is a specification called CityGML, which is being standardized by OGC (Open Geospatial Consortium).

  As described above, according to the embodiment of the present invention, at least a part of indoor space data used for indoor navigation is automatically created based on the input architectural drawing data. This reduces the burden of creating indoor space data by the user.

DESCRIPTION OF SYMBOLS 100 Indoor space data creation assistance system 110 Control part 111 Architectural drawing data input part 112 Drawing auxiliary element removal part 113 Symbol extraction process part 114 Room extraction process part 115 Topology construction process part 116 Indoor space data output part 120 Display part 130 Instruction part 141 Indoor space data storage unit 142 Architectural drawing data storage unit 143 Symbol data storage unit

Claims (12)

An indoor space data creation support system comprising a control unit and a storage unit connected to the control unit,
The storage unit holds architectural drawing data of a building, and equipment data indicating a shape of a figure indicating equipment included in the building,
The controller is
When the architectural drawing data is input, the positions of the columns and walls included in the building are specified based on whether or not the graphic included in the architectural drawing data satisfies a predetermined rule.
By template matching using the equipment data, the location of the equipment included in the building is identified,
Identify the area surrounded by the pillar, wall and equipment whose location is specified as a room,
Based on the location of the identified room and facility, generate information that associates the room, the facility adjacent to the room, and another room adjacent to the facility,
An indoor space data creation support system that outputs indoor space data including the generated information. The controller is
When the interval between parallel lines included in the architectural drawing data is within a predetermined threshold, the parallel lines are identified as walls,
2. The indoor space data creation support system according to claim 1, wherein an area adjacent to the wall and having an area within a predetermined threshold is specified as a pillar among areas excluding the specified wall. . The controller is
Based on the location of the identified wall and column, identify the outline of the building,
The figure and the character included in the input architectural drawing data, at least a part of which is located outside the specified outline, is deleted from the input architectural drawing data. Item 3. The indoor space data creation support system according to Item 2. The facility data includes information indicating a shape of a replacement graphic corresponding to a graphic indicating the facility included in the architectural drawing data,
The controller is
Replacing the shape of the figure indicating the equipment whose position is specified with the shape of the corresponding replacement figure,
4. The indoor space data creation support system according to claim 3, wherein it is determined whether or not the region is surrounded by a column, a wall, and equipment whose position is specified based on a shape of the replacement figure. . The equipment includes at least one of doors, windows, stairs and elevators,
5. The indoor space data creation support system according to claim 4, wherein when the equipment includes the elevator, the shape of the replacement graphic corresponding to the graphic indicating the elevator is larger than the shape of the graphic indicating the elevator.   2. The indoor space data creation support system according to claim 1, wherein the output indoor space data further includes information indicating a position of the specified room and facility. An indoor space data creation support method executed by an indoor space data creation support system comprising a control unit and a storage unit connected to the control unit,
The storage unit holds architectural drawing data of a building, and equipment data indicating a shape of a figure indicating equipment included in the building,
The indoor space data creation support method is:
When the architectural drawing data is input, based on whether or not a graphic included in the architectural drawing data satisfies a predetermined rule, a first procedure for specifying the positions of columns and walls included in the building;
A second procedure for specifying the location of the equipment included in the building by template matching using the equipment data;
A third procedure for identifying a region surrounded by the identified pillar, wall, and facility as a room;
A fourth procedure for generating information associating a room, a facility adjacent to the room, and another room adjacent to the facility based on the identified room and the location of the facility;
And a fifth procedure for outputting indoor space data including the generated information. An indoor space data creation support method comprising: The first procedure includes:
When the interval between parallel lines included in the architectural drawing data is within a predetermined threshold, the procedure for specifying the parallel lines as a wall;
The indoor area according to claim 7, further comprising: a step of identifying, as a pillar, an area that is adjacent to the wall and has an area within a predetermined threshold among the areas excluding the identified wall. Spatial data creation support method. The indoor space data creation support method further specifies an outline of the building based on the specified wall and column positions, and among the figures and characters included in the inputted architectural drawing data, A sixth step of deleting at least a part of the outside of the identified outline from the input architectural drawing data;
9. The indoor space data creation support method according to claim 8, wherein the sixth procedure is executed after the first procedure and before the second procedure. The facility data includes information indicating a shape of a replacement graphic corresponding to a graphic indicating the facility included in the architectural drawing data,
The second procedure includes a procedure of replacing the shape of the graphic indicating the facility whose position is specified with the shape of the corresponding replacement graphic,
10. The third procedure includes a procedure for determining whether or not the region is surrounded by a column, a wall, and equipment whose position is specified based on the shape of the replacement graphic. The indoor space data creation support method described in 1. The equipment includes at least one of doors, windows, stairs and elevators,
11. The indoor space data creation support method according to claim 10, wherein when the facility includes the elevator, the shape of the replacement graphic corresponding to the graphic indicating the elevator is larger than the shape of the graphic indicating the elevator.   The indoor space data creation support method according to claim 7, wherein the output indoor space data further includes information indicating a position of the specified room and facility.

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