Data creation system and data creation method

Abstract

The present invention appropriately associates information related to radio waves with other environment data. A data creation system comprises: a position coordinate acquisition device (10) that acquires a plurality of position coordinates; an environment data acquisition unit that acquires environment data at each of the plurality of position coordinates; and a data creation unit (52) that creates association data in which the position coordinates and the environment data are associated. The environment data acquisition unit is provided with: a plurality of antennas (21), at least one of which is provided for each of differing frequencies of radio wave, and which each acquire first data that is information pertaining to corresponding radio waves; and a magnetic sensor (31) which acquires second data that differs from the first data. The data creation unit (52) creates the association data by associating the position coordinates, the first data acquired by the plurality of antennas (21), and the second data.

Description

Data creation system and data creation method

[0001] The present invention relates to a data creation system that creates data that combines position coordinates and environmental data.

[0002] There is known a system that identifies the location of an object in real time using data (fingerprint, FP) that links location coordinates with environmental data acquired at the location coordinates. For example, Patent Literature 1 discloses a technology that identifies the location of an object using data that links location coordinates with the signal strength of Wi-Fi (registered trademark) radio waves.

[0003] Japan Special Publication No. 2023-522900

[0004] In the above-mentioned system, a technique is known for improving positioning accuracy by linking other environmental data with location coordinates in addition to information about radio waves, such as the signal strength of the radio waves. In such a case, if the frequency of obtaining information about radio waves is low, there is a problem in that the information about radio waves cannot be appropriately linked with other environmental data.

[0005] An object of one aspect of the present invention is to realize a data creation system or the like that can appropriately link information about radio waves with other environmental data.

[0006] In order to solve the above problem, a data creation system according to one aspect of the present invention comprises a position coordinate acquisition unit that acquires multiple position coordinates in a specified area, an environmental data acquisition unit that acquires environmental data for each of the multiple position coordinates, and a data creation unit that creates linked data linking the position coordinates with the environmental data, wherein the environmental data acquisition unit is provided for each of multiple radio waves of different frequencies transmitted from multiple access points, and comprises multiple first acquisition units that acquire first data, which is information about the corresponding radio waves, and second acquisition units that acquire second data different from the first data, and the data creation unit creates the linked data by linking the position coordinates acquired by the position coordinate acquisition unit, the first data acquired by each of the multiple first acquisition units, and the second data acquired by the second acquisition unit.

[0007] In order to solve the above problem, a data creation method according to one aspect of the present invention includes a position coordinate acquisition step of acquiring multiple position coordinates in a predetermined area, an environmental data acquisition step of acquiring environmental data for each of the multiple position coordinates, and a data creation step of creating linked data linking the position coordinates with the environmental data, wherein the environmental data acquisition step includes a first data acquisition step of acquiring first data, which is information about corresponding radio waves of different frequencies transmitted from multiple access points, using multiple first acquisition units, at least one of which is provided for each radio wave, and a second data acquisition step of acquiring second data different from the first data, and in the data creation step, the linked data is created by linking the position coordinates acquired in the position coordinate acquisition step, the first data acquired by each of the multiple first acquisition units in the first data acquisition step, and the second data acquired in the second data acquisition step.

[0008] According to one aspect of the present invention, information about radio waves can be appropriately linked to other environmental data.

[0009] Fig. 1 is a block diagram showing the configuration of a main part of a map creation system according to a first embodiment of the present invention. Fig. 2 is a flowchart showing an example of processing of a method for creating an environmental data map by the map creation system. Fig. 3 is a block diagram showing the configuration of a main part of a map creation system according to a second embodiment of the present invention. Fig. 4 is a block diagram showing the configuration of a main part of a map creation system according to a third embodiment of the present invention. Fig. 5 is a block diagram showing the configuration of a main part of a map creation system according to a fourth embodiment of the present invention.

[0010] [Embodiment 1] An embodiment of the present invention will be described in detail below. Fig. 1 is a block diagram showing the main configuration of a map creation system 100 in this embodiment. The map creation system 100 is a system that creates an environmental data map that indicates the magnitude of environmental data at each position coordinate based on linked data that links position coordinates with environmental data at the position coordinates. The environmental data map created by the map creation system 100 is used to identify the position of the position target based on the similarity to environmental data acquired by the position target.

[0011] (Configuration of map creation system 100) As shown in Figure 1, the map creation system 100 includes a position coordinate acquisition device 10 (position coordinate acquisition unit), a radio wave information acquisition device 20, a magnetic information acquisition device 30, and an information terminal device 40.

[0012] The position coordinate acquisition device 10 acquires position coordinates in a predetermined area. The position coordinate acquisition device 10 is possessed by an acquirer who acquires environmental data. The position coordinate acquisition device 10 is not particularly limited as long as it is capable of acquiring position coordinates. For example, the position coordinate acquisition device 10 may acquire position coordinates using a SLAM (Simultaneous Localization and Mapping) method, which simultaneously performs positioning and map creation. Using the SLAM method, position coordinates can be acquired even using consumer devices such as smartphones. Furthermore, by including the position coordinate acquisition device 10 in the map creation system 100, there is no need to install additional equipment for acquiring position coordinates in the devices that acquire environmental data (the radio wave information acquisition device 20 and the magnetic information acquisition device 30 described below), thereby enabling highly accurate position coordinate acquisition at low cost. When using the SLAM method, SLAM using any sensor can be used, such as Visual SLAM or LiDAR SLAM. The position coordinate acquisition device 10 outputs data including the acquired position coordinates and the time when the position coordinates were acquired to the information terminal device 40 .

[0013] The radio wave information acquisition device 20 acquires first data, which is information about radio waves of different frequencies transmitted from a plurality of access points. The first data is a type of environmental data. The radio wave information acquisition device 20 may be, for example, an information terminal such as a tablet or a smartphone. The radio wave information acquisition device 20 is owned by the acquirer.

[0014] In this embodiment, an example will be described in which the radio wave information acquisition device 20 acquires, as first data, information about each of radio waves of different frequencies transmitted from a plurality of Wi-Fi (registered trademark) networks. Wi-Fi has a plurality of channels with different frequencies in each frequency band, such as 14 channels with different frequencies in the 2.4 GHz band, 19 channels with different frequencies in the 5 GHz band, and 24 channels with different frequencies in the 6 GHz band. In this embodiment, as an example, the radio wave information acquisition device 20 will acquire information about radio waves of different frequencies on a total of 33 channels, including 14 channels in the 2.4 GHz band and 19 channels in the 5 GHz band, but the present invention is not limited to this. The information related to radio waves includes information such as signal strength (also called RSSI (Received Signal Strength Indicator)), SSID (Service Set Identifier), BSSID (Basic Service Set Identifier), manufacturer, transmission / reception speed, frequency band, etc. As shown in FIG. 1 , the radio wave information acquisition device 20 includes a plurality of antennas 21 (first acquisition unit, environmental data acquisition unit) and an output unit 22.

[0015] The multiple antennas 21 respectively acquire information about radio waves of different frequencies transmitted from multiple Wi-Fi access points. In this embodiment, as described above, the radio wave information acquisition device 20 acquires information about radio waves of 33 channels with different frequencies, and therefore the radio wave information acquisition device 20 includes at least 33 antennas 21.

[0016] The output unit 22 outputs information relating to the radio waves respectively acquired by the plurality of antennas 21, i.e., data including first data and the time at which the first data was acquired, to the information terminal device 40. The output unit 22 may output the data including the first data and the time at which the first data was acquired to the information terminal device 40 via wireless communication or via wired communication.

[0017] The magnetic information acquisition device 30 acquires second data, which is data indicating the magnitude of magnetism. The second data is one type of environmental data. The magnetic information acquisition device 30 may be, for example, an information terminal such as a tablet or a smartphone. The magnetic information acquisition device 30 is carried by the acquirer. The magnetic information acquisition device 30 includes a magnetic sensor 31 (second acquisition unit, environmental data acquisition unit) and an output unit 32.

[0018] The magnetic sensor 31 acquires the magnitude of the magnetic field. The magnetic sensor 31 provided in a typical smartphone can acquire the magnitude of the magnetic field at a frequency of approximately 100 Hz.

[0019] The output unit 32 outputs data including the second data acquired by the magnetic sensor 31 and the time when the second data was acquired to the information terminal device 40. The output unit 32 may output the data including the second data and the time when the second data was acquired to the information terminal device 40 via wireless communication or via wired communication.

[0020] The information terminal device 40 creates an environmental data map using data acquired by the position coordinate acquisition device 10 (position coordinate acquisition unit), the radio wave information acquisition device 20, and the magnetic information acquisition device 30. The information terminal device 40 includes a control unit 50, a storage unit 41 that stores various data used by the information terminal device 40, a communication unit 42 that enables the information terminal device 40 to communicate with other devices, an input unit 43 that accepts input operations to the information terminal device 40, and a display unit 44 that displays various information.

[0021] The control unit 50 controls all the units of the information terminal device 40. The control unit 50 includes a data acquisition unit 51, a data creation unit 52, a map creation unit 53, a display control unit 54, and an output unit 55.

[0022] The data acquisition unit 51 acquires data necessary for creating an environmental data map. Specifically, the data acquisition unit 51 acquires data including position coordinates and the time at which the position coordinates were acquired from the position coordinate acquisition device 10. The data acquisition unit 51 also acquires data including first data and the time at which the first data was acquired from the radio wave information acquisition device 20. The data acquisition unit 51 also acquires data including second data and the time at which the second data was acquired from the magnetic information acquisition device 30. The data acquisition unit 51 stores the various acquired data in the storage unit 41.

[0023] The data creation unit 52 creates linked data by linking the position coordinates acquired by the position coordinate acquisition device 10, the first data acquired by each of the multiple antennas 21, and the second data acquired by the magnetic sensor 31. Specifically, the data creation unit 52 first reads data including the position coordinates and the time at which the position coordinates were acquired, data including the first data and the time at which the first data was acquired, and data including the second data and the time at which the second data was acquired from the storage unit 41. Based on the various read data, the data creation unit 52 creates linked data by linking the position coordinates, the first data, and the second data acquired at the same time. As described above, the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30 are owned by the acquirer, and therefore the first data and the second data acquired at the same time as the acquisition time of the position coordinates are environmental data for the position coordinates. The data creation unit 52 creates linked data by linking at least the signal strength of radio waves of each frequency and the BSSID of the first data with the location coordinates and the second data. The data creation unit 52 stores the created linked data in the storage unit 41.

[0024] The position coordinate acquisition device 10 (position coordinate acquisition unit), the radio wave information acquisition device 20, the magnetic information acquisition device 30, the data acquisition unit 51, and the data creation unit 52 function as a data creation system 200 that creates the above-mentioned linked data.

[0025] The map creation unit 53 creates an environmental data map indicating the signal strength and magnetic intensity of radio waves of each frequency at each position coordinate based on the linking data created by the data creation unit 52. The map creation unit 53 stores the created environmental data map in the storage unit 41.

[0026] The display control unit 54 controls the display of the display unit 44. For example, the display control unit 54 reads out the environmental data map created by the map creation unit 53 from the storage unit 41, and causes the display unit 44 to display the environmental data map.

[0027] The output unit 55 reads out the linked data created by the data creation unit 52 from the storage unit 41, and outputs the read linked data to an external device that performs processing to identify the position of the target object by comparing the similarity between the linked data and environmental data acquired by the target object. Note that if the information terminal device 40 has a function to perform processing to identify the position of the target object, the control unit 50 does not need to include the output unit 55.

[0028] (Processing of Map Creation System 100) Next, a description will be given of an example of processing of a method for creating an environmental data map by the map creation system 100. FIG.

[0029] 2, in creating an environmental data map using the map creation system 100, first, the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30 acquire position coordinates, first data, and second data, respectively (step S1). Specifically, as an acquirer moves within a predetermined area while carrying the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30, the position coordinate acquisition device 10 acquires position coordinates (position coordinate acquisition step), the radio wave information acquisition device 20 acquires first data (environmental data acquisition step, first data acquisition step), and the magnetic information acquisition device 30 acquires second data (environmental data acquisition step, second data acquisition step).

[0030] Next, the data acquisition unit 51 of the information terminal device 40 acquires the data acquired by the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30 from the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30, respectively (step S2).

[0031] Next, the data creation unit 52 creates linked data by linking the position coordinates acquired by the position coordinate acquisition device 10, the first data acquired by each of the multiple antennas 21, and the second data acquired by the magnetic sensor 31 (step S3, data creation step).

[0032] Next, the map creating unit 53 creates an environmental data map indicating the signal strength and magnetic intensity of radio waves of each frequency at each position coordinate based on the linking data created by the data creating unit 52 (step S4).

[0033] As described above, the map creation system 100 in this embodiment includes a plurality of antennas 21, at least one for each of radio waves of different frequencies transmitted from a plurality of Wi-Fi access points, for acquiring first data that is information about the corresponding radio waves. Therefore, each of the plurality of antennas 21 can acquire information about radio waves of different frequencies transmitted from the plurality of Wi-Fi access points. This reduces the acquisition time compared to when information about radio waves of all frequencies is acquired using a single antenna 21.

[0034] Here, the frequency with which the antennas 21 acquire information about radio waves transmitted from Wi-Fi access points is lower than the frequency with which the magnetic sensor 31 acquires information about the magnitude of the magnetic field. Therefore, not all of the second data indicating the magnitude of the magnetic field acquired by the magnetic sensor 31 can be linked to information about radio waves. In particular, when a single antenna 21 acquires information about radio waves of all different frequencies, the proportion of the second data acquired by the magnetic sensor 31 that can be linked to information about radio waves is low. In contrast, the map creation system 100 of this embodiment includes multiple antennas 21, which reduces the time required to acquire information about radio waves of all frequencies compared to when a single antenna 21 is used, thereby increasing the frequency with which information about radio waves of all frequencies is acquired. This increases the proportion of the second data acquired by the magnetic sensor 31 that can be linked to information about radio waves. In other words, the second data acquired by the magnetic sensor 31 can be appropriately linked to information about radio waves.

[0035] In the present embodiment, an example has been described in which the radio wave information acquisition device 20 acquires, as the first data, information about radio waves at different frequencies transmitted from a plurality of Wi-Fi (registered trademark) access points, but the present invention is not limited to this. A map creation system according to one aspect of the present invention may also acquire, as the first data, information about radio waves at different frequencies transmitted from a plurality of access points of a standard other than Wi-Fi.

[0036] Furthermore, in the present embodiment, the linked data is created by linking the position coordinates, the first data related to radio waves, and the second data indicating the magnitude of magnetic field, but the present invention is not limited to this. A map creation system according to one aspect of the present invention may be configured to create linked data by linking the position coordinates acquired by the position coordinate acquisition device 10, the first data related to radio waves, and environmental data different from the first data. For example, the linked data may be created by linking other environmental data, such as data indicating environmental sounds or data indicating atmospheric pressure, with the position coordinates and the first data related to radio waves. The map creation system according to one aspect of the present invention may be configured to create linked data by linking the position coordinates acquired by the position coordinate acquisition device 10, the first data related to radio waves, and one type of environmental data different from the first data, or may be configured to create linked data by linking the position coordinates acquired by the position coordinate acquisition device 10, the first data related to radio waves, and multiple types of environmental data different from the first data.

[0037] In addition, in the present embodiment, the configuration has been described in which the position coordinates, the first data, and the second data are acquired by different devices, but the present invention is not limited to this. For example, in a map creation system according to one aspect of the present invention, the position coordinates, the first data, and the second data may be acquired by a single device, or two of the position coordinates, the first data, and the second data may be acquired by a single device.

[0038] In the present embodiment, the acquirer moves within a predetermined area while carrying the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30 to acquire the position coordinates, the first data, and the second data, but the present invention is not limited to this. A map creation system according to one aspect of the present invention may be configured such that the position coordinate acquisition device 10, the radio wave information acquisition device 20, and the magnetic information acquisition device 30 are mounted on a mobile object such as a drone, a cart, or a robot, and the mobile object moves within a predetermined area to acquire the position coordinates, the first data, and the second data. This configuration is also applicable to the second and subsequent embodiments.

[0039] [Embodiment 2] Another embodiment of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0040] 3 is a block diagram showing the main configuration of a map creation system 100A according to this embodiment. As shown in FIG. 3, the map creation system 100A includes an information terminal device 40A instead of the information terminal device 40 in the first embodiment.

[0041] The information terminal device 40A includes a control unit 50A instead of the control unit 50 in embodiment 1. The control unit 50A includes an achievement level calculation unit 56 in addition to the components included in the control unit 50 in embodiment 1. The control unit 50A also includes a display control unit 54A instead of the display control unit 54 in embodiment 1.

[0042] The acquisition achievement level calculation unit 56 calculates the acquisition achievement level of the environmental data. Specifically, the acquisition achievement level calculation unit 56 calculates the acquisition achievement level, which is the ratio of the number of acquired environmental data to the target number of environmental data that is predetermined. For example, ３) is set to a target number of first data acquisitions per region of the predetermined volume of the target area is set to 1000 samples, the acquisition achievement level calculation unit 56 may acquire the position coordinate data output from the position coordinate acquisition device 10 and the first data output from the radio wave information acquisition device 20 while the acquirer is acquiring these data, calculate the number of environmental data acquisitions in the region of the predetermined volume based on these data, and calculate the acquisition achievement level of the first data based on the calculated number of acquisitions.

[0043] The display control unit 54A has the function of displaying the environmental data achievement level calculated by the achievement level calculation unit 56 on the display unit 44 in addition to the functions of the display control unit 54 in the first embodiment.

[0044] According to the above configuration, the acquirer can acquire environmental data while checking the degree of environmental data acquisition achievement, which allows the acquirer to confirm that the target number of acquisitions has been achieved, thereby reducing the possibility that the acquirer will stop acquiring environmental data before reaching the target number of acquisitions.

[0045] [Embodiment 3] Another embodiment of the present invention will be described below. Fig. 4 is a block diagram showing the main configuration of a map creation system 100B in this embodiment. As shown in Fig. 4, the map creation system 100B includes an information terminal device 40B instead of the information terminal device 40 in embodiment 1.

[0046] The information terminal device 40B includes a control unit 50B instead of the control unit 50 in the first embodiment. The control unit 50B includes a noise removal unit 57 (removal unit) in addition to the components included in the control unit 50 in the first embodiment. The control unit 50B also includes a data creation unit 52A instead of the data creation unit 52 in the first embodiment.

[0047] The noise removal unit 57 removes noise data that satisfies a predetermined condition from the acquired environmental data while acquiring the environmental data. For example, the noise removal unit 57 acquires the first data output from the radio wave information acquisition device 20 while the acquirer is acquiring the first data, and removes noise data that satisfies the predetermined condition from the acquired first data. The method for removing noise is not particularly limited, but for example, noise data may be removed by applying a median filter, or noise data within a predetermined region (for example, 1 m ３ ) may be assumed to follow a normal distribution, and data outside the 2σ interval may be removed as noise data. The noise removal unit 57 stores the environmental data from which the noise data has been removed in the storage unit 41.

[0048] The data creation unit 52A creates linked data by linking the position coordinates acquired by the position coordinate acquisition device 10, first data from which noise data has been removed by the noise removal unit 57, and second data from which noise data has been removed by the noise removal unit 57.

[0049] The map creation system 100B in this embodiment has the above-described configuration, and therefore can remove unnecessary noise data while acquiring environmental data, thereby reducing the amount of processing required for the data creation unit 52A to create linked data.

[0050] In the present embodiment, the noise removal unit 57 is configured to remove noise data from both the first data and the second data, but the present invention is not limited to this. In a map creation system according to one aspect of the present invention, the noise removal unit 57 may be configured to remove noise data from only one of the first data and the second data.

[0051] [Embodiment 4] Another embodiment of the present invention will be described below. Fig. 5 is a block diagram showing the main configuration of a map creation system 100C according to this embodiment. As shown in Fig. 5, the map creation system 100C includes a radio wave information acquisition device 20A instead of the radio wave information acquisition device 20 in embodiment 1.

[0052] The radio wave information acquisition device 20A is equipped with a plurality of front antennas 21A (first acquisition unit, front acquisition unit) and a plurality of rear antennas 21B (first acquisition unit, rear acquisition unit) instead of the plurality of antennas 21 in embodiment 1.

[0053] The front antenna 21A is attached to the front of the user and acquires information about radio waves in front of the user. The multiple front antennas 21A each acquire information about radio waves of different frequencies transmitted from multiple Wi-Fi access points.

[0054] The rear antenna 21B is attached to the back of the acquirer and acquires information about radio waves behind the acquirer. The multiple rear antennas 21B each acquire information about radio waves of different frequencies transmitted from multiple Wi-Fi access points.

[0055] When the radio wave information acquisition device 20A acquires information about radio waves of 33 channels with different frequencies, the radio wave information acquisition device 20A includes at least 33 front antennas 21A and at least 33 rear antennas 21B.

[0056] Here, radio waves transmitted from Wi-Fi access points are attenuated by the moisture in the human body, and if only one antenna 21 is provided for each channel, accurate signal strength may not be obtained. In contrast, in the map creation system 100C of this embodiment, the radio wave information acquisition device 20A is provided with at least one front antenna 21A and at least one rear antenna 21B for each of the radio waves of different frequencies. This makes it possible to obtain accurate radio wave signal strength using at least one of the front antenna 21A and the rear antenna 21B.

[0057] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0058] (Summary) A data creation system according to aspect 1 of the present disclosure comprises a position coordinate acquisition unit that acquires a plurality of position coordinates in a predetermined area, an environmental data acquisition unit that acquires environmental data for each of the plurality of position coordinates, and a data creation unit that creates linked data linking the position coordinates with the environmental data, wherein the environmental data acquisition unit is provided for each of radio waves of different frequencies transmitted from a plurality of access points, and comprises a plurality of first acquisition units that acquire first data, which is information about the corresponding radio waves, and a second acquisition unit that acquires second data different from the first data, and the data creation unit creates the linked data by linking the position coordinates acquired by the position coordinate acquisition unit, the first data acquired by each of the plurality of first acquisition units, and the second data acquired by the second acquisition unit.

[0059] A data creation system according to aspect 2 of the present disclosure may be configured such that, in aspect 1 above, the second acquisition unit acquires the second data at a frequency higher than the frequency at which each of the first acquisition units acquires the first data.

[0060] A data creation system according to a third aspect of the present disclosure may be configured in the first or second aspect above, further comprising a display control unit that displays the degree of achievement of obtaining the environmental data.

[0061] A data creation system according to aspect 4 of the present disclosure may be configured in any one of aspects 1 to 3 above to include a removal unit that removes noise data that meets predetermined conditions from the acquired environmental data while the environmental data is being acquired, and the data creation unit creates the linked data using the environmental data from which the noise data has been removed by the removal unit.

[0062] A data creation system according to aspect 5 of the present disclosure may be configured such that, in any of aspects 1 to 4 above, the environmental data acquisition unit includes, as the first acquisition unit, a front acquisition unit that acquires information about the radio waves in front of the acquirer performing the acquisition of the environmental data, for each of the radio waves of the different frequencies, and a rear acquisition unit that acquires information about the radio waves behind the acquirer.

[0063] A data creation system according to a sixth aspect of the present disclosure may be configured in any one of the first to fifth aspects, wherein the position coordinate acquisition unit acquires the position coordinates using a Simultaneous Localization And Mapping (SLAM) method.

[0064] A data creation system according to a seventh aspect of the present disclosure is any one of the first to sixth aspects, wherein the second data is data indicating the magnitude of magnetism.

[0065] A data creation method according to aspect 8 of the present disclosure includes a position coordinate acquisition step of acquiring multiple position coordinates in a predetermined area, an environmental data acquisition step of acquiring environmental data for each of the multiple position coordinates, and a data creation step of creating linked data linking the position coordinates with the environmental data, wherein the environmental data acquisition step includes a first data acquisition step of acquiring first data, which is information about corresponding radio waves of different frequencies transmitted from multiple access points, using multiple first acquisition units, at least one of which is provided for each of the multiple access points, and a second data acquisition step of acquiring second data different from the first data, and in the data creation step, the linked data is created by linking the position coordinates acquired in the position coordinate acquisition step, the first data acquired by each of the multiple first acquisition units in the first data acquisition step, and the second data acquired in the second data acquisition step.

[0066] REFERENCE SIGNS LIST 10 Position coordinate acquisition device (position coordinate acquisition unit) 21 Antenna (first acquisition unit) 21A Front antenna (environment data acquisition unit, first acquisition unit, front acquisition unit) 21B Rear antenna (environment data acquisition unit, first acquisition unit, rear acquisition unit) 31 Magnetic sensor (second acquisition unit) 52, 52A Data creation unit 54, 54A Display control unit 57 Noise removal unit (removal unit)

Claims

1. A data creation system comprising: a position coordinate acquisition unit that acquires multiple position coordinates in a specified area; an environmental data acquisition unit that acquires environmental data for each of the multiple position coordinates; and a data creation unit that creates linked data linking the position coordinates with the environmental data, wherein the environmental data acquisition unit comprises: a plurality of first acquisition units, at least one of which is provided for each of radio waves of different frequencies transmitted from a plurality of access points, and which acquire first data, which is information about the corresponding radio waves; and a second acquisition unit that acquires second data different from the first data, wherein the data creation unit creates the linked data by linking the position coordinates acquired by the position coordinate acquisition unit, the first data acquired by each of the multiple first acquisition units, and the second data acquired by the second acquisition unit.

2. The data creation system according to claim 1, wherein the second acquisition unit acquires the second data more frequently than each of the first acquisition units acquires the first data.

3. The data creation system according to claim 1, further comprising a display control unit that displays the degree of achievement of obtaining the environmental data.

4. A data creation system as described in claim 1, further comprising a removal unit that removes noise data that meets predetermined conditions from the acquired environmental data while the environmental data is being acquired, and the data creation unit creates the linked data using the environmental data from which the noise data has been removed by the removal unit.

5. The data creation system of claim 1, wherein the environmental data acquisition unit comprises, as the first acquisition unit, a front acquisition unit that acquires information about the radio waves in front of the acquirer performing the acquisition of the environmental data, for each of the radio waves of the different frequencies, and a rear acquisition unit that acquires information about the radio waves in rear of the acquirer.

6. The data creation system according to claim 1, wherein the position coordinate acquisition unit acquires the position coordinates using a SLAM (Simultaneous Localization And Mapping) method.

7. The data creation system according to claim 1, wherein the second data is data indicating the magnitude of magnetism.

8. A data creation method comprising: a position coordinate acquisition step of acquiring a plurality of position coordinates in a predetermined area; an environmental data acquisition step of acquiring environmental data for each of the plurality of position coordinates; and a data creation step of creating linked data linking the position coordinates with the environmental data, wherein the environmental data acquisition step comprises: a first data acquisition step of acquiring first data, which is information about corresponding radio waves of different frequencies transmitted from a plurality of access points, by a plurality of first acquisition units, at least one of which is provided for each of the radio waves; and a second data acquisition step of acquiring second data different from the first data, wherein in the data creation step, the linked data is created by linking the position coordinates acquired in the position coordinate acquisition step, the first data acquired by each of the plurality of first acquisition units in the first data acquisition step, and the second data acquired in the second data acquisition step.

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