Real -view 3D technology "Re -engraving" Beijing central axis

Beijing mid -axis application is accelerating. The reporter recently learned that the Municipal Cultural Relics Bureau and the Municipal Institute of Seting and Maaming Design jointly established the "Real 3D Middle Axis" to accurately determine the position of the central axis heritage point, which basically built a three -dimensional realistic scene covering the 6.8 square kilometers of the core area of ​​the central axis heritage.

The "real three -dimensional central axis" record shows the historical changes of the central axis. From the aspects of cultural relics protection, environmental improvement, cultural relics, etc., it provides high -precision spatial data bottom panels for the central axis application, helping the refined governance and scientific protection of the central axis.

Show "undulating symmetry" magnificent order

The central axis of Beijing is a unique testimony of Chinese civilization and cultural traditions. It assumes an important function of building the capital structure of the capital, continuing the historical structure of the ancient capital, and displaying the image of the capital. In 2012, the central axis of Beijing was included in the State Administration of Cultural Relics, the "Preparatory List of the World Cultural Heritage of China", and the formal text will be officially submitted in January 2023.

Chen Pinxiang, an expert in the Municipal Institute of S surveys, introduced that the work of the legacy of the central axis and the current situation of the information of the central axis have put forward high requirements for the integrity and accuracy of the information of the current axis. It is necessary to show the magnificent order of the middle axis "front and back, left and right symmetry", and reflect the traditional Chinese culture of the "facing the back market" in the city behind the space sequence. The concept, real three -dimensional construction is imperative.

On the one hand, the historical images and historical maps accumulated since the establishment of the hospital, on the other hand, quickly opened the real three -dimensional testing and painting. In July 2021, Chen Pinxiang led the team to build the "real three -dimensional central axis". At present, the team has accurately determined the position of the central axis heritage point, using modern technology, once again clarified the position of the central axis, and the space distribution of the inheritance point of the inheritance of the application. After continuous three -dimensional scanning and information collection, internal industry integration, and three -dimensional models, the three -dimensional real scenes covering the core area of ​​the central axis heritage are basically completed.

The accuracy of surveying and mapping data reaches 5 cm

Different from drawing scrolls or visual art digital exhibitions, the first accuracy of surveying and mapping results. The "real three -dimensional central axis" surveying data uses a variety of advanced equipment such as car laser scanners, station laser scanners, and backpack laser scanners, with accuracy of 5 cm.

Zhang Yiran, a senior engineer of the Municipal Settlement Institute, introduced that the central axis of 7.8 kilometers in length connects various heritage nodes through historical roads, and the ingenuity is hidden between each inheritance node. For example, the Jingshan Wanchun Pavilion and Drum Tower on the mid -axis form a landscape overlooking each other. The architectural symmetry around the central axis is distributed on both sides of the road. "If a high deviation appears in the real scene surveying, it cannot reflect its true magnificent and shock in the three -dimensional scene."

When scanning the foreign industry, the municipal testing and painting institute designed a fine -grained plan for partitional grading, and divided according to the content, scanning and construction requirements accuracy, and data acquisition difficulty. For an important node of Tiananmen Square, it is "capable of testing" on the ground and underground; for ancient buildings such as the first agricultural altar and the bell and drum tower, the use of station scanning equipment is used to fully guarantee the data accuracy of the data; The three -dimensional scanning car is performed.

The disappearance node was re -emerged in three dimensions

For more than 700 years, the central axis of Beijing has continued to evolve with historical changes. Therefore, the real three -dimensional testing must not only clearly determine the space location of the current heritage node, but also trace its historical changes.

The old bridge is the only way for the ancient emperor to sacrifice the sky and an important node of the Beijing central axis. However, after many transformations such as reducing arch bridges, extended roads, and removing railways, traces on the floor and underground of the bridge and underground have disappeared.

How to accurately determine the original sites? Entrusted by the Municipal Bureau of Cultural Relics, the Municipal Institute of Testing and Painting launched the original location of the Tianqiao. According to the archives, the overpass is located on the Longxugou. After the Municipal Settlement Institute superimposed the drawing files of the 1971 pipeline census and the historical image map of the 1950s, the position of the Longxougou was basically determined, and the intersection of the dragon's ditch system and the central axis was taken to determine the accurate orientation of the bridge. Combined with the field detection of the underground pipeline, the location of the Tianqiao site was confirmed to be 40 meters north of the current Tianqiao landscape. For this result, the Municipal Cultural Relics Bureau organized multiple rounds of experts to demonstrate and give affirmation.

The team of the Municipal Settlement Academy also used VR technology, etc. to achieve three -dimensional reclaiming node disappearance nodes such as north door and Di'anmen.

The relevant person in charge of the Beijing Middle Axis Application Heritage Protection Office stated that the three -dimensional real -life can be applied to the protection of the central axis, and the comparison and dynamic monitoring of the effect before and after the realization can be achieved; Effect. From discovery, repair, display, use, and monitoring and research, the outline of the protection of the central axis cultural heritage in Beijing is gradually clear. (Source: Beijing Daily)

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