Teaching device of analyzing aerial triangulation in photographic surveying

An aerial triangulation, teaching device technology, applied in the field of surveying and mapping, can solve the problems of neglected influence, large amount of knowledge, fragmented knowledge points, etc., to achieve the effect of cultivating spatial thinking ability

Pending Publication Date: 2020-02-04
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the teaching practice of photogrammetry mainly focuses on the production or programming of "4D products" to realize the process of photographic analysis, ignoring the influence of basic knowledge of photogrammetry on the production of "4D products" or the programming of photographic analysis
In addition, the content of photogrammetry not only has a large amount of knowledge and fragmentary knowledge points, but also abstract knowledge content, which requires students to have strong abstract thinking ability

Method used

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  • Teaching device of analyzing aerial triangulation in photographic surveying
  • Teaching device of analyzing aerial triangulation in photographic surveying
  • Teaching device of analyzing aerial triangulation in photographic surveying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: It is known that the main distance of the camera is f=153.24mm, and the image point coordinates of the four pairs of points and the corresponding ground coordinates are shown in the following table:

[0037] Table 1 Image points and corresponding ground coordinates

[0038]

[0039] Find the outer orientation element of the photo, and the ground point coordinates corresponding to other points with the same name except the above-mentioned 4 pairs of image points with the same name.

[0040] The specific solution process includes two steps:

[0041] step one:

[0042] Bring the main distance f of the camera and the data in Table 1 into Formula 1, list 8 equations, and use Matlab software or Excel software to obtain the outer orientation elements between the two images.

[0043] x s =1492.41127406195; Y s =-554.401567176194; Z s =1425.68660973544; ω=0.00911624039769785; κ=-0.105416434087641

[0044] Step two:

[0045] Measure the coordinates of ot...

Embodiment 2

[0046] Embodiment 2: It is planned to make a 1:10000 topographic map of a certain area by using aerial photography method, wherein the survey area is a rectangular area of ​​10km from east to west and 6km from north to south. Requirements: (1) RC-30 aerial camera is used to obtain images, the focal length is 153.4mm, and the image size is 23cm*23cm; (2) The heading overlap is required to reach 60%; the side overlap is required to reach 30%.

[0047] The specific analysis is as follows:

[0048] According to the relationship between photographic scale and cartographic scale m k =c×m b , when the mapping scale is greater than 1:50,000, the value of c=3~5, and the value of c is 3 in this example. The focal length of the aerial camera is f=153.4mm, the length 1 of the aerial photo=23cm, and the width w=23cm of the aerial photo. According to the requirements of heading overlap and lateral overlap, p%=60%, m%=30%.

[0049] Based on the above known data, the specific dimensions o...

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Abstract

The invention relates to a teaching device of analyzing aerial triangulation in photographic surveying. The teaching device comprises an aerial triangulation analyzing platform, an air line frameworkand a vidicon cone; the aerial triangulation analyzing platform comprises a platform surface and four vertical posts; the bottom ends of the four vertical posts are fixed at the inner sides of the four corners of the platform surface separately; the air line framework comprises an S-shaped curve and a plurality of line rings; the S-shaped curve is fixedly connected with the top ends of the vertical posts; the vidicon cone comprises a conical hook and a conical body; the conical hook is fixedly connected to the top point of the conical body; and the conical hook is used for being suspended at the line rings. The teaching device of analyzing aerial triangulation in photographic surveying can simulate aerial photography to obtain images and analyze aerial triangulation relationships; different materials are selected to build photography analysis spatial relation models, a student-centered practice teaching philosophy is advocated, a teaching practice by using a virtual model instead of areal scene is designed to carry out simulation training on photogrammetric spatial relationships, thereby tamping basic knowledge of photogrammetry of students.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a teaching device for analytic aerial triangulation in photogrammetry. Background technique [0002] Photogrammetry is a process, science and technology that uses images to study spatial information acquisition, processing, extraction, and expression of results. Through this course, students can consolidate their basic knowledge of photogrammetry and improve students' use of photogrammetry knowledge to obtain smart cities. Build the practical ability of basic data. At present, photogrammetry has entered the practical stage of digital photogrammetry from analog photogrammetry to analytical photogrammetry. Photogrammetry involves many knowledge contents, including graphics and imagery, pattern recognition, computer vision, artificial intelligence, etc. [0003] The photogrammetry course is one of the more practical courses in surveying and mapping related profession...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G09B23/00
CPCG09B23/00
Inventor卞玉霞喻亮刘志红卢晓宁王利花褚永彬
OwnerCHENGDU UNIV OF INFORMATION TECH