Island-air triangular measuring method based on GPS/IMU positioning and orientating technology
An aerial triangulation, positioning and orientation technology, applied in the field of aerial photogrammetry, can solve problems such as no control points on islands, poor texture in sea areas, and aerial photos falling into the water.
Inactive Publication Date: 2014-04-09
扬州德可达科技有限公司
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is: there is no control point on the island, a large number of aerial photos "fall into the water", and the texture of the sea area near the island is poor, and it is impossible to obtain enough connecting points to construct an area network to realize aerial triangulation.
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[0017] like figure 1 As shown in the figure, for the target island 1 without control points, when conducting stereo mapping aerial photography, an aircraft with an aerial photography system with high-precision GPS / IMU positioning and orientation equipment must be used to start from the base 3 of the land and shore 2 to The edge area of shore 2, the target island 1 and the water area between the two should be photographed according to flight route 5, and the image sequence with sufficient overlap in area 4 should be obtained. There is at least one geodetic control point.
[0018] An island aerial triangulation method based on GPS / IMU positioning and orientation technology, such as figure 2 shown, the specific steps are as follows:
[0019] Step S1: Use an aerial photography system with high-precision GPS / IMU positioning and orientation equipment to conduct stereo mapping aerial photography of the target island and sea area and the land-shore survey area with a geodetic con...
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The invention relates to the fields of aerial photogrammetry and particularly relates to an island-air triangular measuring method based on a GPS / IMU (Global Position System / Inertial Measurement Unit) positioning and orientating technology. The technical scheme adopted by the invention is that an aerial photography system with high-precision GPS / IMU positioning and orientating equipment is used for carrying out three-dimensional aerial mapping for a target island and sea and a land and shore measuring region with a land control network, extracting joint points of images on the island and the land and shore and directly carrying out virtual joint point generation on fall-water images according to exterior orientation elements solved based on GPS / IMU data, thus realizing the air triangular measurement and calculation by adopting a bundle method and further solving exterior orientation elements of the island, the land and the shore and corresponding object point land coordinates. According to the island-air triangular measuring method disclosed by the invention, the difficult problem that the island measurement cannot be controlled is effectively solved, the foundation for large-medium proportional scale mapping of the island is laid; and meanwhile, the problem of aerial photogrammetry of other measuring regions with poor and single textures (such as deserts, grasslands and snow fields) can be effectively solved.
Description
technical field [0001] The invention relates to the field of aerial photogrammetry, in particular to an island aerial triangulation method based on GPS / IMU positioning and orientation technology. Background technique [0002] Aerial triangulation, also known as aerial triangulation, is a key technology and step in the process of aerial photogrammetry data processing. The position and attitude of , that is, the 6 outer orientation elements of each aerial photo are obtained: Modern air 3 is based on the beam method, that is, by iteratively adjusting the outer orientation elements of the overlapping aerial photos, to achieve the spatial intersection of the beams of the same name, so as to achieve the purpose of finally determining the outer orientation elements of each aerial photo. The mathematical formula used is the collinear equation: the object point in the object space, the projection center of the aerial camera lens and the imaging point of the object point on the aeri...
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IPC IPC(8): G01C11/34
Inventor唐粮
Owner扬州德可达科技有限公司