A method for obtaining elevation information of building main body
An acquisition method and building technology, applied in the field of digital surveying and mapping, can solve the problems of limited use, high labor intensity, low efficiency, etc.
Active Publication Date: 2017-02-01
CHONGQING SURVEY INST +1
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Problems solved by technology
Today, with the rapid development and wide application of digital technology, the use of geographic data without elevation information is greatly limited.
Judging from the current mapping requirements, for these map data that do not contain elevation information, based on these map data that do not contain elevation information, re-perform stereo mapping to obtain the missing elevation information. The labor intensity and efficiency of roof elevation extraction through photogrammetry workstations are relatively large. Low, the degree of automatic extraction is not high
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[0026] Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.
[0027] The invention provides a method for obtaining elevation information of a building body, the method comprising the following steps: S1. Utilizing digital topographic map data to obtain the initial building outline range Q 0 , the initial building outline range Q 0 Fit with DSM data and range Q according to initial building outline 0 In each direction of D pixels, the effective contour range of the building is obtained Q 1 , the D is a positive integer; S2. Calculate the effective outline range Q of the building 1 The first elevation information set X of all DSM data in the interior, calculate the building body elevation confidence interval [θ 1 ,θ 2 ]; S3. Obtain the first building elevation information set X that satisfies the confidence interval [θ 1 ,θ ...
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The invention discloses a method for obtaining elevation information of a main building body. The method comprises the following steps: S1 obtaining an outline range Q0 of an initial building by using digital topographic map data, registering Q0 with DSM data, and obtaining an effective outline range Q1 of the building according to D indentation pixels in various directions of the Q0; S2 calculating a first elevation information set X of all DSM data within the effective outline range Q1 of the building, and calculating an elevation confidence interval [theta1 and theta2] of the main building body; S3 obtaining a second elevation information set X' meeting the confidence interval [theta1 and theta2] in the first elevation information set X of the building, and obtaining a reliable elevation information set X'' according to the geometric position relationship between point coordinates of an elevation value in the second elevation information set X', the effective outline range Q1 of the building and the DSM data range; and S4 calculating the elevation value of the main building body according to the reliable elevation information set X'' of the main building body. The method plays an important role in three-dimensional simulation and construction of digital cities and smart cities.
Description
technical field [0001] The invention belongs to the technical field of digital surveying and mapping, and relates to a method for acquiring the elevation of a main body of a building, in particular to a method for acquiring the elevation of a main body of a building using digital topographic maps and DSM data. Background technique [0002] Since the invention of remote sensing technology and its application in information acquisition, fundamental changes have taken place in human cognition of the external world, and the depth and breadth of information acquired by people have been improved unprecedentedly. At the same time, aerial remote sensing image processing technology, as an important application direction of remote sensing technology, has also developed rapidly. However, in the face of massive remote sensing data, how to automatically identify and extract ground object information in images has become a problem and difficulty in the fields of image processing, pattern ...
Claims
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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 梁建国陈华刚马红胡开全周智勇张燕柴洁张俊前王快刘超祥谭志华李晗欧阳晖王成刘栖铜
Owner CHONGQING SURVEY INST