Precise surveying and mapping method of 0.25m contour interval of flat ground with large scale of 1:500 to 1:200

A technology of equal height distance and scale, which is applied in the field of large-scale digital aerial photogrammetry, can solve problems such as difficult to meet high-precision requirements, and achieve a highly practical effect

Inactive Publication Date: 2010-12-29
煤航(香港)有限公司
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AI Technical Summary

Problems solved by technology

[0008] It can be seen from the above table that the contour distance of 0.25m is rare in China, and it is difficult to meet the high-precision requ

Method used

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  • Precise surveying and mapping method of 0.25m contour interval of flat ground with large scale of 1:500 to 1:200
  • Precise surveying and mapping method of 0.25m contour interval of flat ground with large scale of 1:500 to 1:200
  • Precise surveying and mapping method of 0.25m contour interval of flat ground with large scale of 1:500 to 1:200

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Embodiment Construction

[0024] Technical flow chart of the present invention sees figure 1 , see figure 1 , the technical process of the present invention is:

[0025] 1. Project technical design;

[0026] 2. Plane and elevation measurement of the basic control station; ground data collection; digital aerial photography; digital photography quality acceptance;

[0027] 3. Photo control measurement;

[0028] 4. Full digital aerial triangulation;

[0029] 5. Digital photogrammetry data acquisition;

[0030] 6. 3D map data editing and inspection;

[0031] 7. Submission of 3D map results.

[0032] The present invention firstly adopts the Z / I Imagine DMC aerial digital video camera jointly produced by the U.S. and Germany with world advanced level, which can obtain high quality (high signal-to-noise ratio, high contrast), high geometric and radiation resolution (pixel size 12 μm, Ground resolution can reach 5cm, radiation resolution is greater than 8 bits / pixel) and image information with high imag...

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Abstract

The invention relates to a precise surveying and mapping method of a 0.25m contour interval of a flat ground with a large scale of 1:500 to 1:200, which adopts the aerial and ground combining mode of an aerial survey and a ground survey, complements advantages of each other and ensures the high precision of the 0.25m contour interval. The invention comprises the following steps of: acquiring an image by utilizing a DMC (Digital Micro-Circuit) aerial digital camera; collecting topographic map data by combining the aerial survey and the ground survey; utilizing all horizontal and vertical field distribution points for all photo control points; and aerially triangulating and improving the absolute orientation precision of mapping.

Description

1. Technical field: [0001] The invention relates to a large-scale digital aerial photogrammetry method, in particular to a 1:500, 1:200 large-scale flat ground 0.25 meter high-distance precision surveying and mapping method, which is a digital aerial photogrammetry and ground digital surveying method. The combination of precise surveying and mapping methods is used to solve the high-precision problem of 0.25-meter contour distance in flat areas. 2. Background technology: [0002] my country's photogrammetry and remote sensing technology can be traced back to the early 20th century. For more than 100 years, the discipline has realized the integration of 3S [Remote Sensing (RS), Geographic Information System (GIS), Global Positioning System (GPS)] and the development of geospatial information science from a single aerial photography major to multidisciplinary integration. [0003] With the development and introduction of related technologies such as computer technology and pa...

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Application Information

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IPC IPC(8): G01C11/00G01C11/34
Inventor 宋宏陈建国白志刚严会民安军曹海棠原喜屯苏向辰李力冯西林
Owner 煤航(香港)有限公司
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