Cadastral survey off-line data processing method

A technology of cadastral measurement and processing method, applied in the field of data processing, can solve problems such as difficulties

Active Publication Date: 2015-05-13
SOUTHEAST UNIV
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Problems solved by technology

However, due to the limitation of the accuracy of the inertial sensor and the influence of various interference factors on the actual measurement site, it is very difficult to obtain high-precision positioning information of the point to be measured through online calculation.

Method used

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  • Cadastral survey off-line data processing method
  • Cadastral survey off-line data processing method
  • Cadastral survey off-line data processing method

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Embodiment Construction

[0052] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0053] Such as Figure 1-5 Shown, the cadastral survey data processing method after the event of the present invention comprises the following steps:

[0054] Step 1. Perform data preprocessing on the inertial measurement unit data in the field collected data to remove errors.

[0055] Step 2: Classify the inertial measurement unit data after removing the error in step 1, and classify the points corresponding to known coordinates, known positions, leveling correction points, zero-speed correction points, and static measurement points on the points to be measured. The inertial measurement unit data is recorded as the first type; the inertial measurement unit data corresponding to the static measurement process on the point to be measured will be recorded as the second type during the dynamic measurement process between the two poi...

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Abstract

The invention provides a cadastral survey off-line data processing method. Errors are eliminated by sequentially carrying out data preprocessing on inertial survey unit data in field collected data; and the inertial survey unit data with eliminated errors are classified, and the classified data are processed by adopting kalman fixed-interval optimal smoothing, a pure strapdown algorithm and a reverse navigation algorithm respectively, so that various harmful error components in the inertial survey unit data are effectively filtered, and the high-precision positioning information of points to be surveyed in cadastral survey is acquired.

Description

technical field [0001] The invention belongs to the field of data processing, relates to measurement, surveying and mapping technology and strapdown inertial positioning and orientation technology, in particular to a data processing method after cadastral surveying. Background technique [0002] With the rapid development of my country's economy and society, land use types, methods, and ownership changes greatly and in a wide range, requiring cadastral survey work to be fast, efficient, and accurate. [0003] As the accuracy and efficiency of comprehensive survey methods combined with GPS and total stations have been greatly improved, the progress of cadastral survey technology has been promoted. However, GPS positioning technology has defects such as high environmental dependence and low efficiency of total stations. Still can not meet the needs of cadastral survey. Strapdown inertial positioning system has the characteristics of strong autonomy, strong anti-interference a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20
CPCG01C21/20
Inventor 吴峻纪东良张健施成功闫晶
Owner SOUTHEAST UNIV
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