CN113157826A - Method for measuring tree center coordinates by smart phone - Google Patents
Method for measuring tree center coordinates by smart phone Download PDFInfo
- Publication number
- CN113157826A CN113157826A CN202010014100.5A CN202010014100A CN113157826A CN 113157826 A CN113157826 A CN 113157826A CN 202010014100 A CN202010014100 A CN 202010014100A CN 113157826 A CN113157826 A CN 113157826A
- Authority
- CN
- China
- Prior art keywords
- tree
- positioning
- smart phone
- height
- coordinates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 210000000481 breast Anatomy 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000011835 investigation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
- G01B11/005—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates coordinate measuring machines
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
Landscapes
- Engineering & Computer Science (AREA)
- Databases & Information Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- General Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
A method for measuring a tree center coordinate by a smart phone is characterized in that a smart phone APP which is manufactured autonomously acquires longitude and latitude of a current position through acquiring a Baidu positioning API, then converts the longitude and latitude coordinate into a coordinate matched with a tree breast diameter unit through a conversion projection formula, the acquired coordinate is a rough projection coordinate, the error is large, the positioning precision is improved to a centimeter level through inserting differential positioning, positioning is carried out at a position 40cm away from the south of a tree or at any centimeter shielded by no branch, therefore, the influence of shielding on positioning is reduced, then the tree center coordinate can be accurately obtained by subtracting the current coordinate from the position far away from the tree and the tree breast diameter, namely, subtracting 40cm or the distance away from the tree away from the south of the positioning and then subtracting the tree breast diameter, and therefore, the tree center coordinate can be obtained while the shielding of the tree is avoided.
Description
One, the technical field
The invention relates to a method for measuring tree center coordinates by using a smart phone
Second, technical background
In the forest investigation work, because the positioning equipment can not be moved into the center of the tree for positioning, the absolute position obtained by the traditional tree positioning is positioned beside the tree but not at the center of the tree, so that the single-tree positioning has errors, and the whole tree in the forest has deviation.
According to the method, the accurate center position of the tree is obtained by obtaining the positioning API of the smart phone, inserting differential positioning through coordinate conversion and removing the breast diameter of the tree.
Third, the invention
In order to solve the problem of tree deviation in forest investigation work, the invention provides a method for measuring a tree center coordinate by using a smart phone, which is characterized by comprising the following steps of:
the method includes the steps that an obtained smart phone positioning API is inserted into differential positioning, coordinate projection is converted into a distance unit, operation is conveniently conducted on the distance unit and the breast diameter of the tree, and then the breast diameter of the tree is subtracted to obtain the accurate center position of the tree. The method comprises the following specific steps:
(1) the smart phone APP made autonomously acquires the longitude and latitude of the current position through acquiring a Baidu positioning API, then converts the longitude and latitude coordinates into coordinates matched with tree breast-height units through a conversion projection formula, the acquired projection coordinates are rough projection coordinates, the error is large, the positioning accuracy is improved to centimeter level through inserting differential positioning, positioning is carried out at the position 40cm away from the south of a tree or any centimeter position without being shielded by branches, therefore, the influence of shielding on positioning is reduced, then the current coordinates are differed with the position far away from the tree and the tree breast-height, namely, the distance of 40cm away from the tree or the position far away from the tree is subtracted, the tree breast-height is subtracted, the tree center coordinates can be accurately obtained, and the tree center coordinates can be obtained while the shielding of the tree is avoided.
Compared with the prior art, the method has the following advantages:
(1) compared with the traditional determination, the method can avoid the positioning signal error caused by tree shielding.
(2) The exact tree center coordinates can be obtained by subtracting the breast diameter.
Description of the drawings
The invention is further illustrated with reference to the figures and examples.
FIG. 1 is a schematic diagram of the calculation of the combination of height h and aperture angle inclination
The fifth embodiment is as follows:
a method for measuring a tree center coordinate by a smart phone is specifically as follows:
(1) the method comprises the steps that a smart phone APP which is manufactured automatically acquires longitude and latitude of a current position through acquiring a Baidu positioning API, then converts the longitude and latitude coordinates into coordinates matched with tree breast-height units through a conversion projection formula, the acquired rough projection coordinates have large errors, the positioning accuracy is improved to centimeter level through inserting differential positioning, positioning is carried out at the position 40cm away from the south of a tree or any centimeter position without being shielded by branches, therefore, the influence of shielding on positioning is reduced, then, the difference is made between the current coordinates and the position far away from the tree and the tree breast-height, namely, the distance of 40cm away from the tree or the position far away from the south of the tree is subtracted, and then, one half of the tree breast-height is subtracted, so that the central coordinates of the tree can be accurately obtained;
(2) the calculation formula for obtaining the center coordinate in the smart phone APP is as follows: x is equal to X, and X is equal to X,
h, Y is the ordinate of the tree center, Y is the ordinate of the positioning position, d is the breast diameter, and similarly, X, x is the abscissa, H, H is the tree height, wherein 40 can be set to be an indeterminate value, the distance a from the south of the tree can be measured by matching with a laser range finder, and then a is input into the packaged APP to directly obtain the center coordinate;
(3) the tree parameter data are recorded through the smart phone, accurate center coordinates X, Y, Z, tree breast-height, tree species and tree height are obtained, and data are exported through interior work for subsequent operation.
Claims (1)
1. A method for measuring tree center coordinates by a smart phone is characterized in that the method comprises the following steps of obtaining a smart phone positioning API, inserting differential positioning, converting coordinate projection into a distance unit for operation with the breast height of a tree conveniently, and subtracting the breast height of the tree to obtain the accurate center position of the tree, wherein the specific steps are as follows:
(1) the method comprises the steps that a smart phone APP which is manufactured automatically acquires longitude and latitude of a current position through acquiring a Baidu positioning API, then converts the longitude and latitude coordinates into coordinates matched with tree breast-height units through a conversion projection formula, the acquired rough projection coordinates have large errors, the positioning accuracy is improved to centimeter level through inserting differential positioning, positioning is carried out at the position 40cm away from the south of a tree or any centimeter position without being shielded by branches, therefore, the influence of shielding on positioning is reduced, then, the difference is made between the current coordinates and the position far away from the tree and the tree breast-height, namely, the distance of 40cm away from the tree or the position far away from the south of the tree is subtracted, and then, one half of the tree breast-height is subtracted, so that the central coordinates of the tree can be accurately obtained;
(2) the calculation formula for obtaining the center coordinate in the smart phone APP is as follows: x is equal to X, and X is equal to X,
h, Y is the ordinate of the tree center, Y is the ordinate of the positioning position, d is the breast diameter, and similarly, X, x is the abscissa, H, H is the tree height, wherein 40 can be set to be an indeterminate value, the distance a from the south of the tree can be measured by matching with a laser range finder, and then a is input into the packaged APP to directly obtain the center coordinate;
(3) the tree parameter data are recorded through the smart phone, accurate center coordinates X, Y, Z, tree breast-height, tree species and tree height are obtained, and data are exported through interior work for subsequent operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014100.5A CN113157826A (en) | 2020-01-07 | 2020-01-07 | Method for measuring tree center coordinates by smart phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010014100.5A CN113157826A (en) | 2020-01-07 | 2020-01-07 | Method for measuring tree center coordinates by smart phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113157826A true CN113157826A (en) | 2021-07-23 |
Family
ID=76881436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010014100.5A Pending CN113157826A (en) | 2020-01-07 | 2020-01-07 | Method for measuring tree center coordinates by smart phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113157826A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279431A (en) * | 2021-11-22 | 2022-04-05 | 北京林业大学 | Forest position measuring method and device for dense closed-degree forest |
| CN114777703A (en) * | 2022-04-25 | 2022-07-22 | 贵州省第三测绘院(贵州省国土资源遥感监测中心) | Forestry sample plot accurate positioning method and device based on distance matching |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010032495A1 (en) * | 2008-09-16 | 2010-03-25 | 株式会社アドイン研究所 | Tree information measuring method, tree information measuring device, and program |
| CN104567691A (en) * | 2014-12-25 | 2015-04-29 | 北京林业大学 | Method for directly determining stand volume with mobile phone |
| CN109099856A (en) * | 2018-07-12 | 2018-12-28 | 河北农业大学 | Crown projection measurement method and system based on azimuth angle and distance |
| CN110411360A (en) * | 2018-04-27 | 2019-11-05 | 北京林业大学 | A kind of smart phone surveys tree device and its tree survey method |
-
2020
- 2020-01-07 CN CN202010014100.5A patent/CN113157826A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010032495A1 (en) * | 2008-09-16 | 2010-03-25 | 株式会社アドイン研究所 | Tree information measuring method, tree information measuring device, and program |
| CN104567691A (en) * | 2014-12-25 | 2015-04-29 | 北京林业大学 | Method for directly determining stand volume with mobile phone |
| CN110411360A (en) * | 2018-04-27 | 2019-11-05 | 北京林业大学 | A kind of smart phone surveys tree device and its tree survey method |
| CN109099856A (en) * | 2018-07-12 | 2018-12-28 | 河北农业大学 | Crown projection measurement method and system based on azimuth angle and distance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279431A (en) * | 2021-11-22 | 2022-04-05 | 北京林业大学 | Forest position measuring method and device for dense closed-degree forest |
| CN114777703A (en) * | 2022-04-25 | 2022-07-22 | 贵州省第三测绘院(贵州省国土资源遥感监测中心) | Forestry sample plot accurate positioning method and device based on distance matching |
| CN114777703B (en) * | 2022-04-25 | 2024-04-16 | 贵州省第三测绘院(贵州省国土资源遥感监测中心) | Forestry sample plot accurate positioning method and device based on distance matching |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111559372B (en) | Parking space detection performance evaluation method of parking system and electronic equipment | |
| CN113157826A (en) | Method for measuring tree center coordinates by smart phone | |
| CN110006372A (en) | A kind of three-dimensional point cloud flatness calculation method based on local optimum | |
| CN112325809A (en) | Method for detecting flatness of flange | |
| CN112837604A (en) | Method and device for determining geographic coordinates of target point in map | |
| CN207515747U (en) | A kind of flatness apparatus for evaluating based on BIM | |
| WO2014200043A1 (en) | Preparation system used in surveying work | |
| CN109724569A (en) | A method of object plane size is measured using mobile phone camera | |
| EP3835808A1 (en) | Dynamic power positioning method and dynamic power positioning system | |
| CN111815580B (en) | Image edge recognition method and small module gear module detection method | |
| CN106405604A (en) | Sensor-based positioning method and device thereof | |
| CN111928873A (en) | Method for calibrating height measurement center and camera center | |
| CN114897851B (en) | Coordinate compensation method, device, equipment and medium based on center projection | |
| CN115077478B (en) | Elevation measurement method and system for continuously tracking lifting of monitoring points | |
| CN110645948B (en) | Method and system for extracting hyperelliptic parameters of stumpage breast height section | |
| CN113009415B (en) | Dynamic power positioning method and dynamic power positioning system thereof | |
| CN108195402B (en) | Total station large-inclination angle measurement error analysis and correction method | |
| CN109211271B (en) | Self-correcting method for magnetic compass | |
| CN113050033B (en) | Power positioning method and power positioning device thereof | |
| CN112284391B (en) | Indoor walking object positioning method and device and computer equipment | |
| CN109373899A (en) | A kind of complex parts geometric dimension precision measurement system and method | |
| US11454695B2 (en) | Dynamic power positioning method and dynamic power positioning system thereof | |
| CN114969664B (en) | Water level correction method, device, equipment and medium | |
| CN113834419B (en) | Pipeline depth measurement method and device | |
| CN106250414B (en) | Data storage system and method based on measuring point object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |