JP2000283775A - Apparatus and method for acquiring data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire accurate geographical data such as altitude and azimuth of the current position of a user. SOLUTION: In measuring the altitude, a first altitude measured by a pressure sensor 15 is corrected by a second altitude measured by a GPS processor 3, based on received fixing information, thereby obtaining a final altitude data. The angle difference between the magnetic north azimuth measured by a magnetic sensor 14 and that measured by the GPS processor 3, based on received fixing information is previously stored as a correction angle data in a RAM 7, and in measuring the azimuth the magnetic north azimuth measured by the sensor 14 is corrected according to the correction angle data to obtain a final azimuth data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a data acquisition device and a data acquisition method for acquiring geological data such as altitude and azimuth.

[0002]

2. Description of the Related Art Conventionally, an electronic wristwatch operated by using a battery as a power source not only informs the user of the time but also provides an altitude (altitude above sea level) by providing a pressure sensor and a magnetic sensor. In some cases, the direction (magnetic north direction) can be measured. On the other hand, for example, in a GPS receiver used for a navigation device of a car or a handy type GPS receiver which operates using a battery as a power source, based on positioning information sent from a GPS satellite, the current position of the GPS receiver is simultaneously determined. The altitude and azimuth of the current position can be measured.

[0003]

However, in the altitude measurement using the above-described pressure sensor, an error due to the influence of the weather is inevitably generated because the altitude is measured based on the atmospheric pressure. In order to perform the azimuth measurement, it is necessary to adjust characteristics different for each magnetic sensor at a manufacturing stage. On the other hand, in altitude measurement and azimuth measurement using GPS satellites, GP
If the S satellite cannot be captured, there is a disadvantage that accurate measurement cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a data acquisition device and a data acquisition method capable of acquiring accurate geological data such as altitude and azimuth at a current position of a user. With the goal.

[0005]

According to the first aspect of the present invention, there is provided a data acquisition device for acquiring geological data relating to a current position of a user, wherein the geographic data is acquired. Detecting means for detecting basic data to be used; receiving means for receiving positioning information sent from a satellite; and first geological data based on the basic data detected by the detecting means, received by the receiving means. Corrected by the second geological data based on the positioning information,
And a correction means for obtaining acquired data.

In this configuration, the first geological data based on the basic data is corrected by the second geological data based on the positioning information whose source is different from the first geographic data, and the first geological data is acquired as geological data. Errors contained in the acquired geological data are reduced.

Further, in the invention according to claim 2, when the correction condition determined according to the type of geological data to be acquired is satisfied, the correction means converts the first geological data into the first geological data. Correction was made based on the second geological data. In such a configuration, by appropriately setting the correction conditions, the error of the acquired geological data is reduced to the second value.
It is avoided beforehand that it is increased by geological data.

Further, according to the invention of claim 3, there is further provided a terrain information storage means for storing terrain information of each place,
Position data acquisition means for acquiring position data indicating its own current position based on the positioning information received by the reception means, and whether the current position indicated by the current data acquired by the position data acquisition means is a flat ground, Determining means for determining based on the terrain information stored in the terrain information storage means, wherein the correction condition is that the determination means determines that the current location is a flat ground. In such a configuration, when the reception status of the positioning information is not good and the error included in the second geological data is expected to be large, the error of the acquired geological data is reversed due to this. Can be avoided beforehand.

Further, in the invention of claim 4, the correction condition is a condition that a difference between the first geological data and the second geological data is within a predetermined range. It was taken. In such a configuration, when the second geological data includes a large error for some reason, the error of the acquired geological data is reversed by the second geological data due to this. Can be avoided beforehand.

[0010] In the invention of claim 5, the correction means performs correction for adding the second geological data to the first geological data and averaging the data. Also in such a configuration, an error included in the acquired geological data is reduced.

In the invention of claim 6, the geological data is altitude data indicating altitude. In such a configuration, the first altitude data based on the basic data is corrected by the second altitude data based on the positioning information whose source is different from the first altitude data, and is acquired as altitude data. Error is reduced.

Further, in the invention of claim 7, the geological data is azimuth data indicating a direction. In such a configuration, in such a configuration, the first azimuth data based on the basic data is corrected by the second azimuth data based on the positioning information having a different source, and is acquired as the azimuth data. An error included in the azimuth data is reduced.

Further, according to the invention of claim 8, furthermore, a correction data storage for storing a difference between the first geological data and the second geological data acquired at the same point as correction data. Means, wherein the correction means corrects the first geological data based on the correction data stored in the correction data storage means. In such a configuration, the error included in the acquired azimuth data can be made smaller than the error included in the first azimuth data, and the error caused by the individual difference of the detection means can be absorbed.

According to a ninth aspect of the present invention, there is provided a data acquisition device for acquiring inclination angle data indicating an inclination angle of a route between two different points, and acquiring altitude data indicating an altitude of a current position of the user. Detecting means for detecting basic data used for receiving, receiving means for receiving positioning information sent from a satellite, position data obtaining means for obtaining position data indicating the current location based on the positioning information received by the receiving means, At two different points, a position data measured by the position data obtaining means, and a calculating means for calculating the inclination angle based on the altitude data respectively obtained by using the detecting means, did.

In this configuration, the inclination of the route between the two points is steep, the reception status of the positioning information is poor, that is, the number of satellites that can be captured is small, and the error included in the altitude data that can be acquired based on the positioning information is small. Altitude, the altitude data obtained using the detection means
There are no errors due to the effects of such places. For this reason, the inclination angle is calculated using altitude data having a smaller error than altitude data that can be obtained based on the positioning information.

According to a tenth aspect of the present invention, in the data acquisition method for acquiring altitude data indicating the altitude of the current position of the user, the present position is obtained and it is determined whether the obtained current position is a flat ground. When the result of the determination is a flat ground, the first altitude data acquired based on the basic data detected by the self is corrected by the second altitude data acquired based on the positioning information received from the satellite, and the corrected data Was used as the acquired data.

In this method, when the reception status of the positioning information is not good and the error included in the second altitude data is expected to be large, the error of the obtained altitude data is reduced due to this. Conversely, the increase is avoided.

According to the eleventh aspect of the present invention, in the data acquisition method for acquiring azimuth data indicating the azimuth,
The difference between the first azimuth data obtained based on the basic data detected by the user and the second azimuth data obtained based on the positioning information received from the satellite is calculated and stored as correction data. The first azimuth data obtained based on the obtained basic data is corrected by the stored correction data, and the corrected data is used as the obtained data.
In such a method, an error included in the acquired azimuth data is reduced.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a data acquisition device 1 according to the present invention.
FIG.

This data acquisition device 1 is a wristwatch type that can be worn on the user's arm, and has a GPS antenna 2 and a GPS processing unit 3. The GPS processing unit 3 uses R
F, A / D, data register, counter, decoder, and CPU, ROM and RAM for controlling them
And the like. The GPS processing unit 3 amplifies and demodulates an L1 band received radio wave from a GPS satellite received by the GPS antenna 2, decodes satellite data such as ephemeris information and almanac information, and calculates its own position based on the decoded data. And so on. G
The measurement result by the PS processing unit 3 is sent to the CPU 4 that controls the entire data acquisition device 1, and then displayed on an LCD (not shown) provided in the display circuit 5. When the measurement is not being performed, the clock face and the current time sent from the clock unit (not shown) to the CPU 4 are displayed on the display. The power supply to the GPS processing unit 3 and the CPU 4 is performed by a power supply circuit 6 including a power supply (battery). The CPU 4 operates based on the program stored in the ROM 8 while using the RAM 7 as a working memory, and controls each unit such as the GPS processing unit 3. Various data are stored in the RAM 7 when the CPU 4 controls.

The CPU 4 includes a switch input unit 9 to which a plurality of switches for a user to operate the positioning device 1 are connected, a satellite data storage unit 10, a map data storage unit 11, a direction detection unit 12, The altitude detection unit 13 is connected. The satellite data storage unit 10 is a non-volatile memory such as an EEPROM for storing satellite data such as ephemeris information and almanac information read or updated by the GPS processing unit 3. The map data storage unit 11 is a ROM that stores unchangeable data such as map data and positioning system data, and the map data includes topographical information such as elevation data of each point. The azimuth detecting unit 12 has a magnetic sensor 14 (for example, an MR element (magnetic resistance element)) for detecting the direction of terrestrial magnetism.
And sent to the CPU 4. The altitude detection unit 13 has a pressure sensor 15 for detecting atmospheric pressure, and a detection signal of the pressure sensor 15 is processed by the altitude detection unit 13 and sent to the CPU 4.

Next, the operation of the data acquisition apparatus 1 having the above-described configuration relating to altitude measurement processing executed by the CPU 4 when the altitude measurement mode is set by the user will be described with reference to the flowchart of FIG.

That is, the CPU 4 receives the positioning information sent from the GPS satellites by the GPS processing unit 3, measures the altitude of the current location based on the received positioning information, and compares the measurement result with the first measurement result ( A) RA
It is stored in M7 (step SA1). Further, the altitude of the current location is measured based on the atmospheric pressure detected by the pressure sensor 15 of the altitude detection unit 13, and the measurement result is stored in the RAM 7 as a second measurement result (B) (step SA2). Subsequently, an average value of the first measurement result (A) and the second measurement result (B) is calculated, and the result is used as a final measurement result (step SA3), and displayed on the LCD of the display circuit 5. (Step SA4), and the altitude measurement process ends.

Therefore, in the present embodiment, the measurement altitude at which an error due to a difference in environment such as the weather at the time of measurement is concerned, that is, the measurement altitude based on the atmospheric pressure detected by the pressure sensor 15 is determined by the influence of the weather. By correcting with the measured altitude based on the positioning information not received, a more accurate altitude of the current position can be obtained.

(Second Embodiment) Next, a second embodiment of the present invention will be described. FIG. 3 is a flowchart showing an operation related to another altitude measurement process executed by the CPU 4 in the data acquisition device 1 having the same configuration as that of FIG.

That is, the CPU 4 measures the altitude of the current location based on the atmospheric pressure detected by the pressure sensor 15 of the altitude detecting unit 13, and uses the measurement result as a first measurement result (A).
It is stored in AM7 (step SB1). Next, the positioning information transmitted from the GPS satellite is received by the GPS processing unit 3, and the current position is measured based on the received positioning information (step SB2). Subsequently, based on the measurement result here, that is, the latitude / longitude data, the map data storage 11
The map data around the current location from
3) From the terrain information included in the read map data,
It is determined whether or not the surroundings of the current location are flat (step S
B4). The determination is made based on, for example, altitude data or the like, based on whether or not the area having a predetermined area centered on the current location is an area where a plurality of contour lines are drawn.

Here, when it can be determined that the surroundings of the current location are flat, the altitude of the current location is continuously measured based on the positioning information received in step SB2, and the measurement result is stored in the RAM 7 as a second measurement result (B). It is stored (step SB5). Thereafter, the above-described first measurement result (A)
And the average value of the second measurement result (B) is calculated, and the result is used as the final measurement result (step SB).
6) The result of the measurement is displayed on the LCD of the display circuit 5 (step SA4), and the altitude measurement process ends. When the result of the determination in step SB4 is NO and it can be determined that the surroundings of the current location are not level ground, that is, when it is considered that the surroundings of the current location are mountains or the like, the first measurement result (A) stored in the RAM 7 is used. Is used as the final measurement result (step SB8), it is displayed (step SB7), and the altitude measurement process ends.

Therefore, in the present embodiment, when the surroundings of the current location are flat, it is possible to acquire a more accurate altitude of the current location, as in the first embodiment. Moreover, when the surroundings of the current location are not flat ground but mountainous areas, that is, the reception condition of radio waves is poor or the number of satellites that can be captured is small, it is expected that altitude data that can be obtained based on positioning information will contain large errors. When this is done, such data can prevent the accuracy of the final measurement result from deteriorating. Therefore, the accuracy of the measured altitude can be maintained without being affected by the geographical conditions of the current location.

(Third Embodiment) Next, a third embodiment of the present invention will be described. FIG. 4 relates to the current position and altitude determination processing executed by the CPU 4 as necessary when, for example, a specific mode is set by a user in the data acquisition device 1 having the same configuration as that of FIG. It is a flowchart which shows an operation.

That is, when such an operation is started, the CPU 4 transmits the positioning information sent from the GPS satellite to the GPS
The current position and the altitude (Xm) of the current location are measured based on the received positioning information received by the processing unit 3 (step SC1), and based on the air pressure detected by the pressure sensor 15 of the altitude detection unit 13, the altitude Ym of the current location is measured. Is measured (step SC2). Next, after the number of trials of each of the above-described measurement processes is incremented (step SC3), step SC3 is performed.
It is determined whether the difference between the two measured altitudes Xm and Ym measured at SC1 and SC2 is within a predetermined error range (step SC4). If the difference is within the error range, the measurement result by the pressure sensor 15 is determined to be valid, and the measurement result and the current position (latitude / longitude) are determined as final measurement results (step SC5). , And the process ends.

When the result of the determination in step SC4 is NO and the difference between the two measured altitudes Xm and Ym is outside the error range, that is, the measured altitude Ym by the pressure sensor 15 or the measurement based on the positioning information. If it can be determined that there is a large error in any of the altitudes Xm, the number of trials does not exceed the predetermined number (N in step SC6).
O), returning to step SC1, and repeating the above-described measurement processes again. Then, while repeating steps SC1 to SC4, the measured altitudes Xm and Ym in which the difference between them is within the error range.
Is obtained, the process proceeds to step SC5. As a result, a measurement result expected to include a large error is excluded, and a more accurate measurement altitude based on the detection result of the pressure sensor 15 can be obtained. If the measurement altitudes Xm and Ym in which the difference between them is within the error range are not obtained even after repeating the above-described measurement processes a predetermined number of times, the altitude of the current location is not determined, and only the current position is determined. (Step SC7), the process ends.

Therefore, in the present embodiment, for example, when it is expected that the measured altitude Xm based on the positioning information contains a large error due to the geographical condition of the current location, etc., such data is used. Conversely, it is possible to prevent the accuracy of the final measurement result from being reduced. Therefore, a more accurate measurement altitude can be obtained.

In the present embodiment, the final measurement altitude is used as the detection result of the pressure sensor 15. For example, the difference between the measurement altitude Ym measured by the pressure sensor 15 and the measurement altitude Xm determined by the positioning information is obtained. Is within a predetermined error range, as in the above-described first and second embodiments,
The altitude Ym measured by the pressure sensor 15 may be corrected by the altitude Xm measured by the positioning information, and the correction result may be used as the final measured altitude.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described. FIG. 5 shows a data acquisition device 1 having a configuration similar to that of FIG.
6 is a flowchart showing an operation related to a tilt angle detection process executed by the computer.

That is, when starting the above operation, the CPU 4 transmits the positioning information sent from the GPS satellite to the GPS
The position of the point A which is received by the processing unit 3 and is located at that time is measured based on the received positioning information (step SD).
1) The altitude at point A is measured by the pressure sensor 15 (step SD2). The data of the measurement position and the measurement altitude are sequentially stored in the RAM 7 or the like. Thereafter, while waiting until the predetermined time elapses, with the elapse of the predetermined time (step SD3), the position located at that time is measured as the point B again (step SD4). Subsequently, the distance X between the point A and the point B is obtained from the measurement result here and the data stored in the RAM 7 or the like (step SD5). If it is not equal to or longer than the predetermined distance (NO in step SD6), It returns to step SD3. If the distance is equal to or greater than the predetermined distance, the altitude at that point (point B) is
(Step SD7), and the altitude difference Y between the points A and B is obtained (Step SD8). Then, the inclination angle θ is calculated from the following equation θ = arctan (distance X / altitude difference Y) (step SD9), and the process ends.

Thus, the inclination angle of the route from a certain point (point A) to another point (point B) can be automatically measured without requiring the user to input any numerical data. Here, when acquiring the inclination angle, since the altitude data measured by the pressure sensor 15 is used, the degree of inclination of the route between a certain point (point A) and another point (point B) is sharp, and the positioning information Even in places where reception conditions are poor, that is, places where the number of satellites that can be captured is small, unlike the case where altitude data acquired based on positioning information is used, errors in the acquired inclination angle are due to the influence of such places. Does not exist. Therefore, more accurate inclination angle data can be obtained without being affected by the topography.

In the present embodiment, when the user sets the tilt angle detection mode, the location at that time is set as point A, and another point at least a certain distance from the location is set as point B. Although the inclination angle of the route between the points is measured, it may be performed as follows. For example, a point located at the point of time when the switch is first operated by the user after the setting of the inclination angle detection mode is point A, and a point located at the point of time when the switch is next operated is B.
The above-described calculation of the inclination angle as a point may be performed.
In this case, the inclination angle of the desired section can be detected on the path where the gradient changes.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described. FIG. 6 is a flowchart illustrating an operation related to a corrected azimuth angle acquisition process performed by the CPU 4 in accordance with the position measurement, for example, in the data acquisition device 1 having the same configuration as in FIG.

When this operation is started, the CPU 4 first starts a position measurement process, measures the current position by the GPS processing unit 3, and obtains the azimuth of its own traveling direction (step SE1). Here, when the azimuth of the traveling direction cannot be determined, for example, the moving speed of the user is slow and the GP
When there is no change in position per unit time necessary for determining the azimuth based on the positioning information received from the S satellite (NO in step SE2), the position measurement process is repeated. In addition,
During this time, if the current position can be measured, it is displayed. Next, when the traveling direction is determined in step SE1, as shown in FIG. 7, the angle β of the magnetic north rotor with respect to the traveling direction a is determined (step SE3). Subsequently, after performing the azimuth measurement processing by the magnetic sensor 14 (step SE4), the angle γ of the newly acquired magnetic north C with respect to the traveling direction a is determined (step SE5), and then the magnetic north angle β based on GPS and the magnetic sensor Magnetic north angle γ based on 14
Is calculated as a correction azimuth angle in the RAM
7 (step SE6), and the process ends.

On the other hand, FIG. 8 shows that when the processing described in FIG. 6 is performed and the corrected azimuth angle α is stored in the RAM 7, for example, when the user performs a predetermined button operation, the CPU 4 It is a flowchart which shows the direction display processing operation | movement to perform. In such an operation, the CPU 4
First, the azimuth measurement processing by the magnetic sensor 14 is started (step SF1), and the angle in the magnetic north direction with respect to a reference direction (in the present embodiment, the 12:00 direction of the dial displayed on the display of the display circuit 5). θ is determined (step S
F2). Next, the corrected azimuth α stored in the RAM 7
And the correction data angle θ ′ is calculated by the following equation θ ′ = θ−α (step SF
3) An arrow for magnetic north display is displayed on the dial face of the display (not shown) of the display circuit 5 so as to indicate a direction forming the correction data angle θ ′ with the 12:00 direction (step S).
F4), the process ends.

Therefore, even when an error occurs for each product in the direction measured by the magnetic sensor 14, it is possible to accurately display the magnetic north direction. Further, it is not necessary to adjust such an error occurring for each product before shipping the product. Further, in the present embodiment, the corrected azimuth angle α is acquired in advance with the position measurement and stored, but the corrected azimuth angle α can be acquired every time the azimuth is displayed. It is. However, in this case, since the position measurement process is required every time the azimuth is displayed, it is better to use the corrected azimuth angle α acquired and stored in advance as in the present embodiment. The battery life can be extended without wasting power for display. In addition, accurate azimuth display can be performed even in a place where positioning information cannot be received. In the present embodiment, the corrected azimuth angle α is always acquired when performing the position measurement process. However, the operation of acquiring the corrected azimuth angle α is automatically performed when performing position measurement at the beginning of the day, for example. Or may be performed only when requested by the user.

In the correction azimuth angle acquisition processing (FIG. 6) described above, the deviation angle α is unconditionally calculated and stored as the correction azimuth angle.
If it can be determined that the surroundings of the current location are mountainous, or if the calculated deviation angle α is larger than a predetermined allowable range, the calculation result is discarded and the correction azimuth is stored without storing the correction azimuth. The corner acquisition processing may be terminated. In this case, it is possible to avoid a situation where the stored corrected azimuth includes a large error due to geographical conditions or the like. As a result, it is possible to ensure higher accuracy in the azimuth to be displayed in the azimuth display processing performed thereafter.

[0044]

As described above, in the present invention,
The first geological data based on the basic data is corrected by the second geological data based on the positioning information whose source is different from the first geological data, so that an error included in the obtained geological data such as the altitude and the azimuth is reduced. I did it. Therefore, more accurate geological data can be obtained.

Further, when the correction condition determined according to the type of geological data is satisfied, the first geological data is corrected by the second geological data, so that the reception status of the positioning information is not good. Or the second for other reasons
In the case where a large error is included in the geological data, it is possible to prevent the error of the obtained geological data such as the altitude and the direction from being increased by the second geological data. I was doing it. Therefore, more accurate geological data can be obtained regardless of changes in the situation.

Further, the geological data is azimuth data indicating an azimuth, and a difference between the first geological data and the second geological data is stored as correction data, and the first correction is performed based on the stored correction data. In the method of correcting the geological data of the present invention and obtaining the obtained data, the error caused by the individual difference of the detecting means for detecting the basic data used for obtaining the first geological data can be absorbed, so that a more accurate orientation can be obtained. Data can be obtained.

In another aspect of the present invention, even in a place where the degree of inclination of a route between two points is steep and an error included in altitude data that can be obtained based on positioning information becomes large,
The inclination angle of the route between two points can be calculated by using altitude data with a small error in which there is no error due to the influence of such a place. Therefore, more accurate inclination angle data of a route between two points, that is, geological data can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a data acquisition device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation procedure of an altitude measurement process executed by a CPU according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation procedure of another altitude measurement process executed by a CPU according to the second embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation procedure of a current position and altitude determination process executed by a CPU according to a third embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation procedure of a tilt angle detection process executed by a CPU according to a fourth embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation procedure of a corrected azimuth angle acquisition process executed by a CPU according to a fifth embodiment of the present invention.

FIG. 7 is a diagram showing a corrected azimuth angle α obtained in the embodiment.

FIG. 8 is a flowchart showing an operation procedure of an azimuth display process executed by a CPU in the embodiment.

[Explanation of symbols]

 3 GPS processing unit 4 CPU 7 RAM 8 ROM 12 Azimuth detection unit 13 Altitude detection unit 14 Magnetic sensor 15 Pressure sensor

Claims (11)

[Claims] 1. A data acquisition device for acquiring geological data relating to a current position of a user, detecting means for detecting basic data used for acquiring the geological data, and receiving positioning information sent from a satellite. Receiving means, and first based on basic data detected by the detecting means
And a correction unit that corrects the geological data according to the second geological data based on the positioning information received by the receiving unit and obtains the acquired data. 2. The method according to claim 1, wherein when the correction condition determined according to the type of geological data to be acquired is satisfied,
The data acquisition device according to claim 1, wherein the first geological data is corrected by the second geological data. A topographic information storage unit storing topographic information of each place; a position data obtaining unit obtaining position data indicating a current position of the vehicle based on the positioning information received by the receiving unit; Determination means for determining whether or not the current location indicated by the current data acquired by the data acquisition means is a flat ground based on the terrain information stored in the terrain information storage means, and wherein the correction condition is determined by the determination means 3. The data acquisition device according to claim 2, wherein the determination is that the current location is a flat ground. 4. The apparatus according to claim 2, wherein the correction condition is a condition that a difference between the first geological data and the second geological data is within a predetermined range. Data acquisition device. 5. The apparatus according to claim 1, wherein said correction means performs a correction for adding and averaging said second geological data to said first geological data. Data acquisition device. 6. The data acquisition device according to claim 1, wherein the geological data is altitude data indicating an altitude. 7. The data acquisition device according to claim 1, wherein the geological data is azimuth data indicating a direction. 8. The method according to claim 1, further comprising the steps of:
Correction data storage means for storing the difference between the geological data of the second and the second geological data as correction data, the correction means, based on the correction data stored in the correction data storage means, The data acquisition device according to claim 7, wherein one geological data is corrected. 9. A data acquisition device for acquiring inclination angle data indicating an inclination angle of a route between two different points, comprising: detecting means for detecting basic data used for acquiring altitude data indicating an altitude of a current position of the user; Receiving means for receiving positioning information sent from a satellite; position data obtaining means for obtaining position data indicating a current position based on the positioning information received by the receiving means; A data acquisition device comprising: a calculation unit that calculates the tilt angle based on the position data measured by the acquisition unit and the altitude data acquired by using the detection unit. 10. A data acquisition method for acquiring altitude data indicating an altitude of a current position of a user, determining whether or not the current position of the user is a flat ground, and determining that the base data detected by the self is A data acquisition method comprising: correcting the first altitude data acquired based on the second altitude data acquired based on positioning information received from a satellite, and using the corrected data as acquired data. 11. A data acquisition method for acquiring azimuth data indicating an azimuth, wherein first azimuth data acquired based on basic data detected by the user and second azimuth data acquired based on positioning information received from a satellite. Calculating the difference between the first direction data and the first direction data obtained based on the basic data detected by the self, using the stored correction data, and using the corrected data as the obtained data. A data acquisition method characterized by the following.