Measuring pole coordinate axis installation stand

Abstract

To provide a measuring pole coordinate axis installation stand that facilitates quickening an examination of a disaster assessment, serves as a coordinate system for preparing a cross-section diagram of a disaster site by photograph point group measuring, and achieves an origin, direction, and contraction scale of the coordinate system with a measuring pole 1.SOLUTION: A coordinate axis support arm for achieving a two-dimensional or three-dimensional coordinate system is imparted a contraction scale by mounting a measuring pole insertion hole or measuring pole fitting groove measuring pole provided in the coordinate axis support arm. In the coordinate axis support arm, a calibration window is provided that allows for visibly recognizing coincidence of a length of the coordinate axis support arm with a boundary of a white and red pattern having white and red separately painted in the measuring pole, and the boundary of the pattern. A measuring pole coordinate axis installation stand includes a magnet for making a direction of the measuring pole coordinate axis installation stand coincide with an azimuth thereof, and a bubble level that makes a tilt of the measuring pole coordinate axis installation stand flush with a horizontal line.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a technique for realizing the creation of survey results, which converts a survey pole painted in accurate lengths with white and red patterns essential for on-site surveying into a coordinate axis, and provides an accurate coordinate system origin, direction, and scale for creating three-dimensional point cloud data and cross-sectional views by photo point cloud surveying at disaster-stricken sites and the like due to natural disasters.

Background Art

[0002] In a short distance or a narrow area, a map called a topographic map in the surveying field, which accurately depicts the terrain and features existing on the terrain, is created by using surveying instruments such as a total station for measuring angles and distances, and by a method determined by the Minister of Land, Infrastructure, Transport and Tourism (Non-Patent Document 1). At disaster-stricken sites due to narrow-area natural disasters, in addition to a total station, a survey pole, a wide ribbon tape, or a cloth tape measure is used to create a cross-sectional view for receiving subsidies for disaster recovery work expenses (Non-Patent Document 2). At disaster-stricken sites due to narrow-area natural disasters, surveying using an unmanned aerial vehicle (UAV) or an aircraft can also be used for creating cross-sectional views. Ground laser surveying, UAV photo point cloud surveying, etc. (Non-Patent Document 1), or ground photo point cloud surveying using the same SfM (Structure from Motion) as UAV photo point cloud surveying, etc. (Non-Patent Document 4) can also create high-density three-dimensional point cloud data, so a cross-sectional view at an arbitrary position can be created from the three-dimensional point cloud data (Non-Patent Document 6). There is also ground photo surveying for small objects that measures the shape of an object or creates three-dimensional point cloud data of the shape of an object by copying a two-dimensional ruler with known direction and scale without using reference points or calibration points (Non-Patent Document 4). In addition, in order to receive subsidies for disaster recovery work expenses at disaster-stricken sites due to narrow-area natural disasters, it is necessary to take a large number of photos of the disaster-stricken site (Non-Patent Document 2). Since UAV aerial photogrammetry and terrestrial photogrammetry are methods for creating three-dimensional point cloud data from photographs, color information can be added as an attribute of the three-dimensional point cloud data from the photographs themselves used when creating the three-dimensional point cloud data. In UAV laser surveying and terrestrial laser surveying, color-coded three-dimensional point cloud data can also be created by separately taking photographs and adding the color information of the photographs as an attribute of the observation values obtained by laser surveying (Non-Patent Document 5).

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Non-Patent Document 2

Non-Patent Document 3

Non-Patent Document 4

Non-Patent Document 5

Non-Patent Document 6

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional surveying methods for creating topographic maps and cross-sectional views in short distances or narrow areas have the following drawbacks. (A) In the surveying method using a total station, when there are multiple reference points on site or when there are none, the operator has to create them himself / herself and determine the origin, direction, and scale of the coordinate system. This requires a lot of effort and the operator must have specialized skills related to the surveying method. (B) In creating cross-sectional views using unmanned aircraft or aircraft, or in creating cross-sectional views through three-dimensional point cloud data such as ground laser scanning or UAV photo point cloud surveying, similar to the surveying method using a total station, multiple reference points and calibration points are required, which is time-consuming. (C) In ground photo surveying, it is possible to give the origin, direction, and scale of the coordinate system using a scale with circles drawn at accurate intervals on a small, non-stretchable material in the shape of an L, T, or cross. However, it is two-dimensional, small, and can only ensure measurement accuracy in a local area. Also, due to its flat shape, the range where the scale can be read is limited, and its use outdoors where various forms are assumed is limited. If the scale with circles drawn at accurate intervals on a small, non-stretchable material in the shape of an L, T, or cross is enlarged, it becomes cumbersome to carry, and it is necessary to separately improve it so that it can be equipped with devices for installing it on the ground surface and giving horizontal and azimuth. (D) When using surveying poles, wide ribbon tapes, or cloth tapes and receiving subsidies for disaster recovery work expenses, it is necessary to set up many surveying poles along the width of the disaster and the cross-sectional direction of the disaster so that the disaster situation can be understood, or to stretch wide ribbon tapes or cloth tapes, etc. This requires a lot of effort and it is difficult to ensure accuracy. (E) In the method of creating topographic maps and cross-sectional views using unmanned aircraft or aircraft, in addition to the surveying method, it is required to have specialized skills related to unmanned aircraft or aircraft, and a lot of costs are required. Attention must also be paid to ensuring the safety of third parties. In the creation of a cross-sectional view for receiving disaster recovery business expenses at a disaster site due to a narrow-area natural disaster, it is necessary to take a large number of photos of the disaster site in addition to the cross-sectional view. In the surveying using a laser, on the other hand, photos must be taken separately, and there may be a deviation between the measured values by the laser and the color information of the photos. The present invention has been invented to solve the above problems.

Means for Solving the Problems

[0005] To achieve this object, the present invention is specified by the combination of the following items (1) to (13). (1) A measuring pole 1 which is a slender cylindrical rod, painted alternately in white and red, the boundary 4 of which serves as a scale, and having a protection part 2 at the head for protecting the starting position 3 of the alternate painting in white and red from damage, and a conical protrusion for inserting into the ground at the bottom, and a measuring pole coordinate axis installation base using the measuring pole 1 as the coordinate axis of the coordinate system for use as a mark of the position when performing surveying. (2) The measuring pole coordinate axis installation base may be an assembled type separated and assembled for each coordinate axis support arm, or may be an integral type in which the coordinate axis support arms are integrated. (3) The measuring pole coordinate axis installation base is provided with installation base fixing legs 8 that can be fixed to the measuring pole coordinate axis installation base for stably installing the measuring pole coordinate axis installation base even on slopes or uneven terrains, and the coordinate axis support arm main axis and the coordinate axis support arm sub-axis that bear the level of the measuring pole coordinate axis installation base may be provided with coordinate axis support arm telescopic legs 9·9 whose lengths can be adjusted. (4) The coordinate axis support arms constituting the measuring pole coordinate axis installation base are provided with two or more directions, and the shape may be an L-shape, a T-shape, a cross-shape, or a configuration in which coordinate axis support arms are added upward or downward to these, and the angle of the included angle between each coordinate axis support arm may be arbitrary. (5) The measuring pole coordinate axis installation base has the origin of the coordinate system provided at an arbitrary place, and the direction of the coordinate system is determined by the coordinate axis support arms. (6) The coordinate axis support arms that make up the pole coordinate axis installation base for measurement are provided with pole fitting grooves 10·10 for measurement or pole insertion holes 15 in the coordinate axis direction. In the case of the pole fitting grooves 10·10 for measurement, the measurement pole 1 can be mounted by fitting the measurement pole 1, and in the case of the pole insertion holes 15 for measurement, the measurement pole 1 can be inserted to mount the measurement pole 1. (7) The pole fitting grooves 10·10 for measurement or the pole insertion holes 15 for measurement are internally connected, and the coordinate system is represented by being able to fit or insert the measurement pole 1 from the protection part 2 up to the intersection where they are internally connected. (8) By mounting the measurement pole 1 from its protection part 2 into the pole fitting grooves 10·10 for measurement or the pole insertion holes 15 provided in the coordinate axis support arms that make up the pole coordinate axis installation base for measurement, the measurement pole 1 serves as the coordinate axis in the coordinate system. (9) When the measurement pole 1 is inserted to the deepest position into the coordinate axis support arms that make up the pole coordinate axis installation base for measurement, calibration windows 18a·18a·18b·18b where the boundaries 4 of the white and red patterns alternately painted on the measurement pole 1 can be visually recognized from many directions are provided on both side surfaces or all side surfaces of each coordinate axis support arm. (10) On the outer surface below the lower frames 19·19 of the calibration windows 18a·18a·18b·18b or on the outer surface beside the vertical frames 20·20, there are calibration rules 21·21 for calibrating so that the boundaries 4 of the white and red patterns alternately painted on the measurement pole 1 coincide with the reference of the coordinates held by the coordinate axis support arms. (11) The holes or patterns drawn on the outer surface of the pole coordinate axis installation base for measurement are arranged disorderly so that it is easy to identify the same location shown in different photos when creating three-dimensional point cloud data from the photos. (12) The pole coordinate axis installation base for measurement may be provided with spirit level mounting shelves 22·22 on which a spirit level that can indicate whether the pole coordinate axis installation base is placed horizontally or vertically can be installed. (13) The pole coordinate axis installation base for measurement may be provided with azimuth magnet mounting shelves 23·23 on which an azimuth magnet that can indicate the azimuth where the pole coordinate axis installation base is placed can be installed.

[0006] Further, the invention according to the second claim of the present invention is the surveying pole coordinate axis installation base according to claim 1, wherein when the surveying pole 1 is inserted from the protection part 2 to the deepest part in the coordinate axis support arm, the boundary 4 of the white and red patterns alternately painted on the surveying pole 1 is provided with calibration windows 18a, 18a, 18b, 18b of the coordinate axis support arm that can be visually recognized from many directions.

[0007] Further, the invention according to the third claim of the present invention is the surveying pole coordinate axis installation base according to claim 1, wherein the lengths of the white part and the red part of the surveying pole 1 are each 200 millimeters as a standard, but the length of the protection part 2 of the surveying pole 1 varies depending on the product and is about 15 to 20 millimeters. Therefore, it has a function of making the scale of the surveying pole coincide with the coordinate system of the surveying pole coordinate axis installation base by means of the calibration rules 21, 21 for the difference in the lengths of these protection parts 2.

[0008] Further, the invention according to the fourth claim of the present invention is the surveying pole coordinate axis installation base according to claim 1, wherein the calibration rules 21, 21 according to the present invention are colored so that the left and right match the color of the surveying pole from the position that serves as a reference for calibrating the scale of the surveying pole 1 to the coordinate system of the surveying pole coordinate axis installation base, and have a function that it can be seen at a glance that they are calibrated.

[0009] Furthermore, the invention according to the fifth claim of the present invention is the surveying pole coordinate axis installation base according to claim 1, wherein the coordinate axis support arm according to the present invention has a design that makes it easy to identify the same location shown in different photos when creating three-dimensional point cloud data from photos, and the design has holes or patterns on the outer surface that are not similar to other patterns.

Advantages of the Invention

[0010] In order to determine the origin, direction, and scale of the coordinate system serving as the basis for surveying, it is only necessary to install the surveying pole coordinate axis installation base on the ground and attach the surveying pole, without requiring specialized technology from the operator.

[0011] By simply installing the pole coordinate axis installation base for surveying on the ground and attaching the surveying pole, the origin, direction, and scale of the coordinate system serving as the reference for surveying can be determined, making it more convenient than the surveying method that requires the installation of reference points and calibration points.

[0012] To determine the origin, direction, and scale of the coordinate system serving as the reference for surveying, the only thing specifically required is the pole coordinate axis installation base for surveying. As the coordinate axis, a surveying pole that is always carried around for surveying can be used. There is no need for a total station or a tripod to support the total station, so it is easy to carry around.

[0013] As the origin and direction of the coordinate system for photogrammetric point cloud surveying, which can automatically create three-dimensional point cloud data from repeatedly photographed photos, and as a reference for determining the photos, a surveying pole attached to the pole coordinate axis installation base, painted in an accurate length with a cylindrical white and red pattern, can be photographed in the photos from any direction including the air. Therefore, the photos that must be repeatedly photographed for photogrammetric point cloud surveying to automatically create three-dimensional point cloud data can be photographed without limiting the shooting position, making the work proceed smoothly.

[0014] In a method where many surveying poles are erected to use a wide ribbon tape or a cloth tape measure, etc., without using surveying instruments such as a total station, by simply installing the pole coordinate axis installation base on the ground surface and attaching the surveying pole to the coordinate axis support arm, the origin, direction, and scale of the coordinate system serving as the reference for surveying can be determined, and accurate surveying can be performed.

[0015] By installing the pole coordinate axis installation base on the ground surface, attaching the surveying pole to the coordinate axis support arm, and having the surveying pole attached to the coordinate axis support arm appear in some consecutive photos of the photos taken continuously with overlap, three-dimensional point cloud data can be created by photogrammetric point cloud surveying. Therefore, there is no need for the high costs and safety assurance required in the case of surveying using an unmanned aerial vehicle or an aircraft, and inexpensive and reassuring work can be carried out.

[0016] At the disaster site or the like due to a narrow-area natural disaster, install a surveying pole coordinate axis installation stand, attach a surveying pole, and photograph the disaster site or the like so that the surveying pole coordinate axis installation stand with the surveying pole attached appears in some of the continuously taken and overlapping photos. By simply processing the taken photos with photo point cloud surveying software, three-dimensional point cloud data can be created and can be used in various ways. From the three-dimensional point cloud data, cross-sectional views necessary for disaster restoration can be created with arbitrary survey lines using three-dimensional CAD software, and the disaster site and cross-sectional views can be displayed from a free viewpoint using three-dimensional point cloud display software, improving the efficiency of the review in disaster assessment. Regarding the photos of the disaster site required in disaster assessment, by adding the color information of the photos taken to create the three-dimensional point cloud data as an attribute of the three-dimensional point cloud data, there is no need to take photos, the work load at the disaster site is reduced, and the efficiency of the review in disaster assessment can be improved.

Best Mode for Carrying Out the Invention

[0017] Hereinafter, the best mode for carrying out the present invention will be described.

[0018] ===Surveying Pole Coordinate Axis Installation Stand=== (A) The surveying pole coordinate axis installation stand is an assembled type consisting of four mechanisms: a coordinate axis support arm main shaft 5, a coordinate axis support arm sub-shaft 6, a coordinate axis support arm vertical axis 7, and an installation stand fixed leg 8. On the back surface 17 of the coordinate axis support arm main shaft 5 and the coordinate axis support arm sub-shaft 6, there are provided coordinate axis support arm telescopic legs 9·9. (B) The coordinate axis support arm main shaft 5 and the coordinate axis support arm sub-shaft 6 are joined orthogonally horizontally to represent a horizontal plane. (C) The coordinate axis support arm main shaft 5 and the coordinate axis support arm vertical axis 7 are joined by making the coordinate axis support arm vertical axis 7 perpendicularly orthogonal to the horizontal coordinate axis support arm main shaft 5 to represent a vertical plane. (D) By the above (A) to (C), in a right-handed coordinate system, the coordinate axis support arm main shaft 5 serves as the X-axis, the coordinate axis support arm sub-shaft 6 serves as the Y-axis, and the coordinate axis support arm vertical axis 7 serves as the Z-axis, representing the role of a coordinate system for three-dimensional space expression. The origin of the (Ho) coordinate system is set at the center of the joint portion 11 of the coordinate axis support arm main shaft 5, the coordinate axis support arm sub-shaft 6, and the coordinate axis support arm vertical axis 7. (He) To attach the surveying pole 1 to the surveying pole coordinate axis installation base, first insert the surveying pole 1 from the protection part 2 into the surveying pole insertion hole 15 of the coordinate axis support arm vertical axis 7 until it touches the bottom surface 16 of the surveying pole fitting groove 10 of the coordinate axis support arm main shaft 5. Next, insert the surveying pole 1 to be fitted into the surveying pole fitting grooves 10 of the coordinate axis support arm main shaft 5 and the coordinate axis support arm sub-shaft 6 until the surveying pole 1 to be fitted into the coordinate axis support arm main shaft 5 and the coordinate axis support arm sub-shaft 6 respectively touches the side surface of the surveying pole 1 of the coordinate axis support arm vertical axis 7.

[0019] ===Coordinate Axis Support Arm Main Shaft=== (A) The coordinate axis support arm main shaft 5 is provided with coupling gaps 12a, 12b, and 12c for coupling the coordinate axis support arm sub-shaft 6, the coordinate axis support arm vertical axis 7, and the installation base fixing leg 8. (B) The coupling gaps 12a, 12b, and 12c are equipped with anti-slip fittings 14a, 14b, and 14c for fixing the coordinate axis support arm sub-shaft 6, the coordinate axis support arm vertical axis 7, and the installation base fixing leg 8. (C) On the coordinate axis support arm main shaft 5, a surveying pole fitting groove 10 for fitting the surveying pole 1 is engraved from above, and the surveying pole 1 is fitted from the protection part 2. (D) On two side surfaces of the coordinate axis support arm main shaft 5, calibration windows 18a, 18a with a width of 30 mm centered at the 215 mm position from the innermost part of the surveying pole fitting groove 10 are provided, which is 15 mm close to the shortest length of the protection part 2 of the surveying pole 1 plus the 200 mm length of the white and red painted on the surveying pole 1. On the outer side surface below the lower frames 19, 19 of the calibration windows 18a, 18a, calibration rules 21, 21 in the range of -25 mm to 15 mm with reference graduations for matching the coordinate system of the surveying pole coordinate axis installation base are provided. The -5 mm position of the calibration rules 21, 21 is made to coincide with the 215 mm position from the innermost part of the surveying pole fitting groove 10, so that regardless of the difference in the length of the protection part 2 of the surveying pole 1, the position of the boundary 4 between the white and red painted on the surveying pole 1 can be easily calibrated with respect to the reference graduations of the calibration rules 21, 21. (Ho) The calibration rules 21·21 are painted white and red on either side of the reference scale, similar to the surveying pole 1, allowing one to easily see if the boundary 4 between the reference scale and the surveying pole 1 aligns. (He) On the back surface 17 of the tip of the coordinate axis support arm spindle 5, there is a coordinate axis support arm telescopic leg 9 that can adjust the inclination of the coordinate axis support arm spindle 5 by telescoping the legs. Additionally, a coordinate axis support arm telescopic leg stopper wall 24 with a spring clip for fastening the tip of the coordinate axis support arm telescopic leg 9 is provided on the connecting side of the coordinate axis support arm spindle 5, enabling the storage of the coordinate axis support arm telescopic leg 9. (To) On the side surface of the coordinate axis support arm spindle 5 towards the coordinate axis support arm sub-axis 6, there is a bubble level mounting shelf 22 for mounting a bubble level. (Chi) On the upper surface at the base of the coordinate axis support arm spindle 5, there is a magnetic azimuth mounting shelf 23 for mounting a magnetic azimuth.

[0020] ===Coordinate Axis Support Arm Sub-Axis=== (Ii) At the base of the coordinate axis support arm sub-axis 6, there is a coupling protrusion 13a for coupling the coordinate axis support arm sub-axis 6 to the coupling gap 12a of the coordinate axis support arm spindle 5. (Ro) On the coordinate axis support arm sub-axis 6, a surveying pole fitting groove 10 for fitting the surveying pole 1 is engraved from above, and the surveying pole 1 is fitted from the protective part 2. (Ha) On two side surfaces of the coordinate axis support arm sub-axis 6, calibration windows 18a·18a with a width of 30 mm are provided, centered at a position 215 mm from the innermost part of the surveying pole fitting groove 10, which is the sum of 15 mm, close to the shortest length of the protective part 2 of the surveying pole 1, and the length of the white and red parts painted on the surveying pole 1 (200 mm). Additionally, on the outer side surface below the lower frames 19·19 of the calibration windows 18a·18a, calibration rules 21·21 in the range from -25 mm to 15 mm with a reference scale for aligning with the coordinate system of the surveying pole coordinate axis installation table are provided, with the -5 mm position of the calibration rules 21·21 made to coincide with the 215 mm position from the innermost part of the surveying pole fitting groove 10. This enables easy calibration of the position of the boundary 4 between the white and red parts painted on the surveying pole 1 with respect to the reference scale of the calibration rules 21·21, regardless of the length difference of the protective part 2 of the surveying pole 1. (B) The calibration rules 21·21 are painted white and red on either side of the reference scale, just like the surveying pole 1, so that it is immediately obvious whether the boundary 4 between the reference scale and the surveying pole 1 aligns. (E) The back surface 17 at the tip of the sub-axis 6 of the coordinate axis support arm has a telescopic leg 9 of the coordinate axis support arm that can adjust the inclination of the sub-axis 6 of the coordinate axis support arm by allowing the legs to expand and contract. Additionally, it is equipped with a spring clip for fixing the tip of the telescopic leg 9 of the coordinate axis support arm on the connection side of the sub-axis 6 of the coordinate axis support arm, and a wall 24 for stopping the telescopic leg 9 of the coordinate axis support arm that can store the telescopic leg 9 of the coordinate axis support arm. (F) On the side surface of the sub-axis 6 of the coordinate axis support arm towards the main axis 5 of the coordinate axis support arm, there is a mounting shelf 22 for a spirit level to mount the spirit level.

[0021] ===Vertical Axis of the Coordinate Axis Support Arm=== (A) At the base of the vertical axis 7 of the coordinate axis support arm, there is a coupling protrusion 13b for coupling the vertical axis 7 of the coordinate axis support arm to the coupling gap 12b of the main axis 5 of the coordinate axis support arm. (B) The vertical axis 7 of the coordinate axis support arm has a surveying pole insertion hole 15 drilled through it for inserting the surveying pole 1, allowing the surveying pole 1 to be inserted from the protective part 2. (C) On the four side surfaces at the tip of the vertical axis 7 of the coordinate axis support arm, calibration windows 18b·18b with a height of 30 millimeters are provided, centered at a position 215 millimeters from the innermost part of the surveying pole insertion hole 15, which is the sum of 15 millimeters, close to the shortest length of the protective part 2 of the surveying pole 1, and the lengths of the white and red parts painted on the surveying pole 1, which is 200 millimeters. On the outer side surfaces of the vertical frames 20·20 of the calibration windows 18b·18b, calibration rules 21·21 in the range from -25 millimeters to 10 millimeters with a reference scale for aligning with the coordinate system of the surveying pole coordinate axis installation table are provided, and the position at -5 millimeters of the calibration rules 21·21 is made to coincide with the position 215 millimeters from the innermost part of the surveying pole fitting groove 10. Regardless of the height difference of the protective part 2 of the surveying pole 1, the position of the boundary 4 between the white and red parts painted on the surveying pole 1 can be easily calibrated with respect to the reference scale of the calibration rules 21·21. (B) The calibration rules 21·21 are painted white and red on either side of the reference scale, allowing for a quick visual check of whether the boundary 4 between the reference scale and the surveying pole 1 aligns correctly.

[0022] ===Installation Base Fixed Legs=== The head of the installation base fixed leg 8 is equipped with a coupling protrusion 13c for coupling the installation base fixed leg 8 to the coupling gap 12c at the head of the coordinate axis support arm spindle 5.

[0023] ===Design=== The surfaces of the coordinate axis support arm spindle 5, the coordinate axis support arm sub - axis 6, and the coordinate axis support arm vertical axis 7 are provided with holes drilled in a disorderly arrangement and shape.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Explanation of Reference Signs

[0025] 1 Surveying pole 2 Protection part 3 Starting position 4 Boundary 5 Coordinate axis support arm spindle 6 Coordinate axis support arm sub - axis 7 Coordinate axis support arm vertical axis 8 Installation base fixed leg 9 Coordinate axis support arm telescopic leg 10 Surveying pole fitting groove 11 Coupling part 12 Coupling gap 13 Coupling protrusion 14 Anti-slip fitting 15 Measuring pole insertion hole 16 Bottom surface 17 Rear surface 18 Calibration window 19 Lower frame 20 Vertical frame 21 Calibration gauge 22 Mounting shelf for bubble level 23 Mounting shelf for azimuth magnet 24 Coordinate axis support arm telescopic leg stop wall

Claims

1. An invention specified by the combination of the following items (1) to (13). (1) A long cylindrical rod, painted alternately white and red, with its boundary (4) serving as a scale, having a protective part (2) at the head to protect the starting position (3) of the alternating white and red painting from damage, having a conical protrusion at the bottom for insertion into the ground, and a surveying pole (1) used as a position mark during surveying as the coordinate axes of a coordinate system, a surveying pole coordinate axis installation base. (2) The surveying pole coordinate axis installation base may be an assembled type separated and assembled for each coordinate axis support arm, or an integrated type with the coordinate axis support arms integrated. (3) The surveying pole coordinate axis installation base is provided with installation base fixing legs (8) that can be fixed to the surveying pole coordinate axis installation base for stably installing the surveying pole coordinate axis installation base even on slopes or uneven terrains, and the main axis of the coordinate axis support arm and the sub-axis of the coordinate axis support arm responsible for the horizontal of the surveying pole coordinate axis installation base may be provided with coordinate axis support arm telescopic legs (9·9) whose lengths can be adjusted. (4) The coordinate axis support arms constituting the surveying pole coordinate axis installation base have two or more directions, and their shapes may be L-shaped, T-shaped, cross-shaped, or a configuration with coordinate axis support arms added above or below these, and the angle of the included angle between each coordinate axis support arm may be arbitrary. (5) For the surveying pole coordinate axis installation base, the origin of the coordinate system is provided at an arbitrary location, and the direction of the coordinate system is determined by the coordinate axis support arms. (6) The coordinate axis support arms constituting the surveying pole coordinate axis installation base are provided with surveying pole fitting grooves (10·10) or surveying pole insertion holes (15) in the coordinate axis direction. In the case of the surveying pole fitting grooves (10·10), the surveying pole (1) can be fitted, and in the case of the surveying pole insertion holes (15), the surveying pole (1) can be inserted, so that the surveying pole (1) can be mounted. (7) The surveying pole fitting grooves (10·10) or surveying pole insertion holes (15) are connected internally, and the surveying pole (1) can be fitted or inserted from the protective part (2) to the intersection connected internally, thereby representing the coordinate system. (8) By mounting the surveying pole (1) from its protective part (2) to the surveying pole fitting grooves (10·10) or surveying pole insertion holes (15) provided on the coordinate axis support arms constituting the surveying pole coordinate axis installation base, the surveying pole (1) serves as the coordinate axis in the coordinate system. When the measuring pole (1) is inserted all the way into the coordinate axis support arm that constitutes the measuring pole coordinate axis installation table, calibration windows (18a, 18a, 18b, 18b) through which the boundary (4) between the white and red patterns alternately painted on the measuring pole (1) can be visually recognized from many directions are provided on both side surfaces or all side surfaces of each coordinate axis support arm. On the outer surface below the lower frame (19, 19) of the calibration window (18a, 18a, 18b, 18b) or on the outer surface beside the vertical frame (20, 20), there are calibration rules (21, 21) for calibrating so that the boundary (4) between the white and red patterns alternately painted on the measuring pole (1) coincides with the reference of the coordinates held by the coordinate axis support arm. The holes drilled or patterns drawn on the outer surface of the measuring pole coordinate axis installation table are arranged in a disorderly manner that makes it easy to identify the same location shown in different photos when creating three-dimensional point cloud data from the photos. The measuring pole coordinate axis installation table may be provided with spirit level mounting shelves (22, 22) on which a spirit level that can indicate whether the measuring pole coordinate axis installation table is placed horizontally or vertically can be installed. The measuring pole coordinate axis installation table may be provided with azimuth magnet mounting shelves (23, 23) on which an azimuth magnet that can indicate the azimuth in which the measuring pole coordinate axis installation table is placed is installed.

2. In claim 1, when the measuring pole (1) is inserted all the way into the protection part (2) of the coordinate axis support arm, the calibration windows (18a, 18a, 18b, 18b) of the coordinate axis support arm through which the boundary (4) between the white and red patterns alternately painted on the measuring pole (1) can be visually recognized from many directions.

3. The lengths of the white part and the red part of the measuring pole (1) are each 200 millimeters as the standard, but the length of the protection part (2) of the measuring pole (1) varies depending on the product and is about 15 to 20 millimeters. Therefore, calibration rules (21, 21) for calibrating the scale of the measuring pole so that the difference in the lengths of these protection parts (2) is calibrated to the coordinate system of the measuring pole coordinate axis installation table.

4. Calibration rules (21, 21) that are color-coded so that the left and right match the color of the measuring pole from the position that serves as the reference for calibrating the scale of the measuring pole (1) to the coordinate system of the measuring pole coordinate axis installation table.

5. A coordinate axis support arm having holes or patterns of a shape that is not similar to other patterns in a design that makes it easy to identify the same location shown in different photographs when creating three-dimensional point cloud data from the photographs, and the design is provided on the outer surface.

Images