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Land underwater terrain integrated mapping method and system

A technology of underwater topography and mapping methods, applied in the field of map surveying and mapping, can solve the problems of mutual independence and inability to integrate, and achieve the effect of uniform, accurate and high reliability of map surveying and mapping

Pending Publication Date: 2022-05-17
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned defects in the prior art that land topographic measurement and underwater topographic measurement are independent and cannot be integrated, the present invention proposes an integrated land and underwater topography mapping method and system

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  • Land underwater terrain integrated mapping method and system
  • Land underwater terrain integrated mapping method and system
  • Land underwater terrain integrated mapping method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Example 1: Acquisition of Land Terrain Data G

[0065] The integrated land and underwater terrain mapping method provided in this embodiment is mainly applicable to small water bodies. Therefore, in this embodiment, light and small unmanned aerial vehicles are selected to collect land terrain data.

[0066] In this embodiment, the collection of land terrain data strictly complies with the relevant national regulations on airspace control. 50-120 meters, the ground resolution value is better than 20cm, and the flight route is designed as figure 2 Parallel routes as shown, such as figure 2 Shown, the air route also can adopt " zigzag " shape air route during concrete implementation.

[0067] Land terrain data G is composed of M land measurement points, recorded as: G = {g1, g2, g3, ..., gm, ..., gM}; where, gm = [x gm ,y gm ,z gm ], m represents the serial number, 1≤m≤M, gm represents the mth measurement point on land, [x gm ,y gm ,z gm ] represents the measured...

Embodiment 2

[0068] Embodiment 2: Acquisition of underwater terrain data U

[0069] In this embodiment, the underwater terrain data is collected by a navigating or unmanned ship, and a navigating or unmanned ship device with longitude and latitude measurement and sounding functions is selected, such as an unmanned ship carrying acoustic equipment for sounding. During the specific implementation, the on-site collection route of the unmanned ship needs to arrange the depth collection route according to the actual situation of the collected water body, and the recommended route is set as a parallel route (such as image 3 (a)) and "zigzag" routes (such as image 3 (b)) 2 types.

[0070] The underwater terrain data is composed of K underwater measurement points, denoted as: U={u1, u2, u3,...,uk,...,uK}; where, uk=[x uk ,y uk ,z uk ], k represents the serial number, 1≤k≤K, uk represents the kth measurement point underwater, [x uk ,y uk ,z uk ] represents the measured value of the xyz thr...

Embodiment 3

[0071] Embodiment 3: Acquisition of topographic data W of waterside line

[0072] In this embodiment, the differential GPS receiving system is used to obtain the geodetic elevation of the waterside line, and then the normal height of the measuring point is obtained through the seven-parameter or elevation fitting method. Regarding the measurement and acquisition of normal height, it needs to be carried out in accordance with the relevant operating standards and specifications of the surveying and mapping industry. Here we will focus on the principle and method of point layout for waterside terrain data collection. In this embodiment, the topographic data measurement points of the waterside line need to be evenly distributed on the waterside line of the measured water body, and the key inflection points and areas with large terrain changes need to be densely arranged. The number of measurement points must be greater than 9. For details on the distribution of measurement points ...

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Abstract

The invention provides a land and underwater terrain integrated mapping method and system, and the method comprises the steps: taking water line terrain data as a reference basis, mapping land terrain data and underwater terrain data to a same coordinate system for fusion and unification, and obtaining land and underwater three-dimensional terrain data at the same time, and the integrity and the accuracy degree of large-scale restoration of the real land and underwater cross-regional space topography are ensured.

Description

technical field [0001] The invention relates to the field of map surveying and mapping, in particular to an integrated land and underwater terrain surveying method and system. Background technique [0002] In recent years, with the fine design of water environment restoration projects, etc., the demand for large-scale topographic maps is increasing. At present, the mapping method of large-scale topographic maps mainly relies on manual data collection in the field using GPS-RTK, total station and other equipment, and then processing and producing in-house. This kind of operation method has low efficiency, long time span, high cost, high labor intensity, and there are certain safety risks. The production progress is also affected by the weather during the operation, which is far from meeting social needs. How to improve work efficiency, reduce production costs, and reduce field workload is an urgent requirement for obtaining large-scale topographic maps today. [0003] Becau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V10/80G06K9/62G06T3/00G06T17/05G01C15/00G01S19/14G01S19/41
CPCG06T17/05G01C15/00G01S19/14G01S19/41G06F18/251G06T3/147
Inventor 蒋锦刚冯慧云余增亮张亚国张长风喻颖
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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