CN107504961A - A kind of forest fire localization method based on digital tripod head and map - Google Patents
A kind of forest fire localization method based on digital tripod head and map Download PDFInfo
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- CN107504961A CN107504961A CN201710779905.7A CN201710779905A CN107504961A CN 107504961 A CN107504961 A CN 107504961A CN 201710779905 A CN201710779905 A CN 201710779905A CN 107504961 A CN107504961 A CN 107504961A
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- tripod head
- forest fire
- map
- digital
- digital tripod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/04—Interpretation of pictures
- G01C11/30—Interpretation of pictures by triangulation
Abstract
The invention discloses a kind of forest fire localization method based on digital tripod head and map, when forest fire forest fires occur, according to digital tripod head return parameters and digital terrain data, pass through the spatial analysis functions of geographical information technology software, calculate the x coordinate, y-coordinate and height above sea level of the condition of a fire, and condition of a fire coordinate is oriented in map scene.The forest fire localization method based on digital tripod head and map of the present invention, forest fire can be quickly only accurately positioned in the very first time by individual digit head, effective technical support is provided for " morning finds, morning is set out, early puts out " three principles of fighting forest fire, it is the key that Forest Fire Prevention Direction center swing into action puts out mountain fire, there is good practicality.
Description
Technical field
The invention belongs to forest fire field of locating technology, and in particular to a kind of Forest Fire based on digital tripod head and map
Feelings localization method.
Background technology
Current existing forest fire localization method has
1) handhold GPS device, method, the method possess certain danger because personnel are directly entered forest land and conflagration area
Property.
2) method for using laser range finder survey+PDA, the method is because personnel are directly entered forest land and conflagration area, tool
Standby certain risk.
3) observation tower intersection, the method need the monitoring device of Shuo observation tower to complete jointly.Specific practice is simultaneously
Place on fire is observed, respective observed bearing is recorded and reports the azimuth determined with fire prevention direction center, fire prevention direction center foundation,
Forest fires position is determined on topographic map.
The content of the invention
Goal of the invention：For the deficiencies in the prior art, it is an object of the invention to provide one kind to be based on digital tripod head
With the forest fire localization method of map, provided for " morning finds, morning is set out, early puts out " three principles of fighting forest fire
The technical support of effect.
Technical scheme, in order to realize foregoing invention purpose, the technical solution adopted by the present invention is：
A kind of forest fire localization method based on digital tripod head and map, when forest fire forest fires occur, according to number
Word head return parameters and digital terrain data, by the spatial analysis functions of geographical information technology software, the x for calculating the condition of a fire is sat
Mark, y-coordinate and height above sea level, and condition of a fire coordinate is oriented in map scene.
The described forest fire localization method based on digital tripod head and map, is comprised the following steps that：
1) by the head geographical position coordinates (x, y, z) and the grid bearing angle beta of return of digital tripod head, in numerical map
In draw straight line；This straight line and digital terrain contour are obtained by the spatial analysis functions of geographical information technology software
A series of intersection point data set coordinate Pn(Xn,Yn,Zn)；
2) x coordinate of each intersection point, y-coordinate and height above sea level are concentrated by intersection point data, calculate each intersection point with
Air line distance L between digital tripod headkAnd the absolute elevation difference △ H between each intersection point and digital tripod headi, calculate public
Formula is：
△Hi=Zi-Z；
3) the vertical angle α returned based on digital tripod head, concentrates each intersection point and monopod video camera straight by intersection point data
Linear distance Lk, calculate the absolute elevation difference △ H of forest fire and monopod video camerak, calculation formula is：
△Hk=Lk×tanα；
4) point in garbled data set, △ HiWith △ HkPoint occurs for the minimum as forest fire of difference.
Described vertical angle α precision is 0.01 °.
The return parameters of described digital tripod head include grid azimuth, vertical angle, the geographical position of digital tripod head installation
With height above sea level.
The spatial analysis functions of described geographical information technology software intersect for line, find intersection set.
Described geographical information technology software is arcgis10.0.
Described straight line is the extended line of the hypotenuse line of grid azimuth.
Beneficial effect：Compared with prior art, the forest fire localization method of the invention based on digital tripod head and map,
Forest fire can be quickly only accurately positioned in the very first time by individual digit head, be fighting forest fire " it is early find,
Early set out, early put out " three principles provide effective technical support, and it is that Forest Fire Prevention Direction center swing into action puts out mountain
The key of fire, has good practicality.
Brief description of the drawings
Fig. 1 is the forest fire localization method schematic diagram based on digital tripod head and map；
Fig. 2 is map rectilinear.
Embodiment
With reference to specific accompanying drawing, the present invention is described further.
The forest fire localization method based on digital tripod head and map of the present invention, when forest fire forest fires occur, according to
It is (grid azimuth, vertical according to digital tripod head (digital tripod head, scene in diverse location install a lot of in advance) return parameters
Angle, the geographical position of digital tripod head installation and height above sea level), and digital terrain data, by geographical information technology software (such as
Arcgis10.0 spatial analysis functions (line intersects, and finds intersection set)), the x coordinate, y-coordinate and height above sea level of the condition of a fire are calculated,
And positioned in map (geographical information technology software has storing map) scene.Technique is the " early to send out of fighting forest fire
It is existing, early to set out, early put out " three principles provide effective technical support, and it is the most important condition of forest fire protection emergency command.
The forest fire localization method based on digital tripod head and map, as shown in figure 1, comprising the following steps that：
1) the head geographical position coordinates (x, y, z) by digital tripod head and grid bearing angle beta (the direct north angle of return
For 0 °, angle, 0~360 ° of scope are represented in the direction of the clock, and precision is 0.01 °), straight line is drawn in numerical map
(being the extended line of the hypotenuse line of grid azimuth)；It is straight that this is obtained by the spatial analysis functions of geographical information technology software
A series of intersection point data set coordinate P of line and digital terrain contourn(Xn,Yn,Zn)；
2) x coordinate, y-coordinate and height above sea level of each intersection point are concentrated by intersection point data；Calculate each intersection point with
Air line distance L between digital tripod headkAnd the absolute elevation difference △ H between each intersection point and digital tripod headi, calculate public
Formula is：
△Hi=Zi-Z
3) the vertical angle α (precision be 0.01 °) returned based on digital tripod head, by intersection point data concentrate each intersection point with
Monopod video camera air line distance Lk, calculate the absolute elevation difference △ H of forest fire and monopod video camerak, calculation formula is：
△HK=Lk×tanα
4) point in garbled data set, △ HiWith △ HkPoint occurs for the minimum as forest fire of difference.
Using the above method, using Nanjing forest as test site, field test is carried out, wherein, gather the x of digital tripod head
Coordinate, y-coordinate and height (Xi'an1980 coordinate system, coordinate value (353035.342,3550518.600,92) above sea level；Field simulation
Condition of a fire Measured Coordinates value (353367.531,3550232.979,24)；The digital contour for realizing region is obtained, and carries out each step
Rapid calculating and compare processing, the forest fire elements of a fix value finally obtained for (353359.594,3550238.238,
24), it is less than 10 meters with Measured Coordinates error amount, precision is higher.
Claims (7)
1. a kind of forest fire localization method based on digital tripod head and map, it is characterised in that occur in forest fire forest fires
When, according to digital tripod head return parameters and digital terrain data, pass through the spatial analysis functions of geographical information technology software, measuring and calculating
X coordinate, y-coordinate and the height above sea level of the condition of a fire, and condition of a fire coordinate is oriented in map scene.
2. the forest fire localization method according to claim 1 based on digital tripod head and map, it is characterised in that specific
Step is as follows：
1) the head geographical position coordinates (x, y, z) by digital tripod head and the grid bearing angle beta returned, draw in numerical map
Go out straight line；The one of this straight line and digital terrain contour is obtained by the spatial analysis functions of geographical information technology software
Serial intersection point data set coordinate Pn(Xn,Yn,Zn)；
2) x coordinate, y-coordinate and height above sea level of each intersection point are concentrated by intersection point data, calculates each intersection point and numeral
Air line distance L between headkAnd the absolute elevation difference △ H between each intersection point and digital tripod headi, calculation formula is：
<mrow>
<msub>
<mi>L</mi>
<mi>k</mi>
</msub>
<mo>=</mo>
<msqrt>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mi>k</mi>
</msub>
<mo>-</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mo>+</mo>
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<mo>(</mo>
<msub>
<mi>y</mi>
<mi>k</mi>
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<mi>y</mi>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
<mo>,</mo>
</mrow>
△Hi=Zi-Z；
3) the vertical angle α returned based on digital tripod head, by intersection point data concentrate each intersection point and monopod video camera straight line away from
From Lk, calculate the absolute elevation difference △ H of forest fire and monopod video camerak, calculation formula is：
△Hk=Lk×tanα；
4) point in garbled data set, △ HiWith △ HkPoint occurs for the minimum as forest fire of difference.
3. the forest fire localization method according to claim 2 based on digital tripod head and map, it is characterised in that described
Vertical angle α precision be 0.01 °.
4. the forest fire localization method according to claim 1 based on digital tripod head and map, it is characterised in that described
Digital tripod head return parameters include grid azimuth, vertical angle, digital tripod head installation geographical position and height above sea level.
5. the forest fire localization method according to claim 1 based on digital tripod head and map, it is characterised in that described
The spatial analysis functions of geographical information technology software intersect for line, find intersection set.
6. the forest fire localization method according to claim 1 based on digital tripod head and map, it is characterised in that described
Geographical information technology software be arcgis10.0.
7. the forest fire localization method according to claim 2 based on digital tripod head and map, it is characterised in that described
Straight line for grid azimuth hypotenuse line extended line.
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| CN201710779905.7A CN107504961A (en) | 2017-09-01 | 2017-09-01 | A kind of forest fire localization method based on digital tripod head and map |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040239912A1 (en) * | 2001-05-30 | 2004-12-02 | Rui Mario Correia Da Silva Vilar | Lidar system controlled by computer for smoke identification applied, in particular, to early stage forest fire detection |
| CN101860562A (en) * | 2010-03-18 | 2010-10-13 | 南京森林公安高等专科学校 | Integrated forest fire dynamic monitoring and accurate positioning system and positioning method |
| CN103971479A (en) * | 2013-01-29 | 2014-08-06 | 北京林业大学 | Forest fire positioning method based on camera calibration technology |
| CN104776844A (en) * | 2015-04-02 | 2015-07-15 | 重庆市海普软件产业有限公司 | Fire point locating method for forest fire prevention |
| CN106802126A (en) * | 2017-01-09 | 2017-06-06 | 天津大学 | A kind of one camera land-based target punctuate space-location method based on digital elevation map |
-
2017
- 2017-09-01 CN CN201710779905.7A patent/CN107504961A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040239912A1 (en) * | 2001-05-30 | 2004-12-02 | Rui Mario Correia Da Silva Vilar | Lidar system controlled by computer for smoke identification applied, in particular, to early stage forest fire detection |
| CN101860562A (en) * | 2010-03-18 | 2010-10-13 | 南京森林公安高等专科学校 | Integrated forest fire dynamic monitoring and accurate positioning system and positioning method |
| CN103971479A (en) * | 2013-01-29 | 2014-08-06 | 北京林业大学 | Forest fire positioning method based on camera calibration technology |
| CN104776844A (en) * | 2015-04-02 | 2015-07-15 | 重庆市海普软件产业有限公司 | Fire point locating method for forest fire prevention |
| CN106802126A (en) * | 2017-01-09 | 2017-06-06 | 天津大学 | A kind of one camera land-based target punctuate space-location method based on digital elevation map |
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Application publication date: 20171222 |
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