PolyU invention makes 3D mapping more accurate

June 7, 2016, Hong Kong Polytechnic University
PolyU invention makes 3D mapping more accurate
This new technology allows monthly updates and handling of massive data and can cater for the needs in the big data era. It can be used in topographic mapping and 3D modelling of cities for smart city development. Credit: PolyU

The two major traditional 3D mapping techniques are photogrammetry using satellite/aerial imagery and laser scanning. The former offers higher accuracy in the horizontal direction while the latter shows higher accuracy in vertical direction. They may produce errors at different levels and there are usually inconsistences between the mapping products derived from them.

To eliminate data errors and integrate the advantages of the existing technologies, Prof. Wu Bo at The Hong Kong Polytechnic University (PolyU)'s Department of Land Surveying and Geo-Informatics developed a "Novel Integrated 3D Mapping Model". Integrating multi-platform satellite/aerial imagery and data, the technology greatly improved the accuracy in mapping products by 26 to 66 percent to centimetre level.

The cost of the mapping products produced by this model is more or less the same as the . This new technology allows monthly updates and handling of massive data and can cater for the needs in the big data era. It can be used in topographic mapping and 3D modelling of cities for smart city development. For example, it is particularly useful in analysing ventilation, visibility and sunlight distribution between buildings.

Explore further: Hong Kong scientists make great strides in lunar mapping

Related Stories

Hong Kong scientists make great strides in lunar mapping

September 12, 2011

Surveying experts of The Hong Kong Polytechnic University (PolyU) have successfully developed methodologies for precise mapping of the Moon, after intensive analysis of the data captured by the Chinese lunar orbiter ChangE-1 ...

The high-tech 3D mapping of Homo naledi's Dinaledi chamber

May 31, 2016

The extremely difficult conditions in which University of the Witwatersrand's (Wits) Professor Lee Berger's Rising Star team was forced to work, gave rise to the use of space-age technology to map the Dinaledi chamber and ...

A new mobile phone app for grassroots mapping

May 4, 2016

University of Exeter academics have created an app which could help aid humanitarian rescue work in disaster-struck regions by using geographic data to map landscapes.

Recommended for you

Study suggests trees are crucial to the future of our cities

March 25, 2019

The shade of a single tree can provide welcome relief from the hot summer sun. But when that single tree is part of a small forest, it creates a profound cooling effect. According to a study published today in the Proceedings ...

Matter waves and quantum splinters

March 25, 2019

Physicists in the United States, Austria and Brazil have shown that shaking ultracold Bose-Einstein condensates (BECs) can cause them to either divide into uniform segments or shatter into unpredictable splinters, depending ...

Apple pivot led by star-packed video service

March 25, 2019

With Hollywood stars galore, Apple unveiled its streaming video plans Monday along with news and game subscription offerings as part of an effort to shift its focus to digital content and services to break free of its reliance ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.