News

Feature Talk "Seeing and Unseen Underground Utilities in 3D" at Geospatial Lab

On 22 February 2025, Ir. Prof. Wallace Lai, Associate Head of Department (Teaching) was invited to be the guest speaker for a feature talk "Seeing and Unseen Underground Utilities in 3D" at the Geospatial Lab. The talk attracted 23 participants who attended in person and 30 people participated online. We sincerely thank all participants for their enthusiastic engagement and the support from Geospatial Lab. This presentation explored the intricacies of Hong Kong's underground pipelines, highlighting methods to accurately locate them without excavation. During the interactive session, participants also discovered detection technologies, gaining valuable insights into the measurement and data analysis of the underground world. Click here to read more.

LSGI Joint Research with International Scientists Unveils Ice Sheet Melt Behavior in Greenland Using Satellite Positioning Data

We are thrilled to share that Prof. Jianli CHEN, Professor of the Department of Land Surveying and Geo-informatics (LSGI) together with a team of global researchers, have integrated various modern space geodetic techniques, particularly satellite positioning data, to monitor the subsidence of vertical bedrock and successfully quantify summer water storage in the Greenland ice sheet. This groundbreaking research, published in the prestigious journal Nature, offers new insights and evidence regarding the contribution of ice sheets to global sea-level rise. The Greenland ice sheet, second only to Antarctica in size, plays a crucial role in global sea-level rise. If it were to melt completely, sea levels could rise by an alarming seven meters. Despite its significance, many aspects of how water accumulates, is stored, and is released within the ice sheet remain unclear. Prof. Jianli Chen, collaborated with experts from Hong Kong, Mainland China, the US, the Netherlands, and Belgium, has made significant strides in understanding these processes by integrating advanced satellite positioning data and other space geodetic techniques. The research team focuses on the evolution meltwater storage to gain a deeper understanding of ice sheet melting behavior and its effects on sea-level rise. They have been at the forefront of utilizing the Greenland GPS Network (GNET) and satellite gravity data from NASA’s Gravity Recovery and Climate Experiment. With nearly 22 Global Navigation Satellite System (GNSS) stations positioned around Greenland, they continuously gather positioning data. This has led them to conclude that high summer temperatures could become a regular occurrence in the future. Accurately predicting meltwater storage during these periods is essential for evaluating sea-level rise. Prof. Chen highlighted that the study, which took years of preparation, not only integrated various modern space geodetic techniques but also involved challenging expeditions to some of the most remote areas on Earth. He emphasized that the significant results highlight the importance of extensive international cooperation in addressing climate change challenges. Their research would contribute to achieving accurate model performance for warmer years, which would aid in projecting ice-sheet behavior and its impact on sea-level rise in the coming decades. This research underscores our academic staff's dedication to advancing scientific knowledge and addressing the pressing issue of climate change. Our work is vital for developing accurate models to predict future sea-level changes, particularly in light of anticipated Arctic warming.    Media coverages: 18 Feb 2025 Oriental Daily News (格陵蘭融冰機制 理大以衞星數據解謎) - https://polyu.me/4b2Bzv2 Ming Pao Daily News (理大衛星數據測格陵蘭融水) – https://polyu.me/431denw am730 (理大參與研究格陵蘭冰蓋融化 助預測海平面上升速度) - https://polyu.me/3X3Goyi Ta Kung Pao (理大參與研究格陵蘭冰蓋融化 助預測海平面上升速度) - https://polyu.me/3X17FBB Wen Wei Po (理大與國際專家靠衛星定位數據 揭示格陵蘭冰蓋融化機制)- https://polyu.me/4hGscU6 Hong Kong Commercial Daily (理大與國際專家合作運用衛星定位數據 助預測海平面上升速度) - https://polyu.me/415fWpm Dot Dot News (理大參與研究格陵蘭冰蓋融化 助預測海平面上升速度) - https://polyu.me/4hFRBgV Line Today (理大參與研究格陵蘭冰蓋融化 助預測海平面上升速度) - https://polyu.me/42Zm1WH Hong Kong China News Agency (理大參與研究格陵蘭冰蓋融化 助預測海平面上升速度) - https://polyu.me/4bbDSMj 19 Feb 2025 Wuxi Daily (理大與國際專家合作運用衛星定位數據 揭示格陵蘭冰蓋融化機制) - https://polyu.me/4gNsebR 羊城晚報 (創新採用衛星數據破解冰蓋融化國際難題 理大學者參與研究助預測海平面上升速度) - https://polyu.me/4k1P4iC 南方日報 (理大研究揭格陵蘭冰蓋融化機制 助預測海平面上升速度) - https://polyu.me/41pV6RR Sina (創新採用衛星數據破解冰蓋融化國際難題 理大學者參與研究助預測海平面上升速度) - https://polyu.me/41jxQFX Sohu (理大研究揭格陵蘭冰蓋融化機制 助預測海平面上升速度) - https://polyu.me/3X6cgT6 Zhihu (理大參與研究格陵蘭冰蓋融化 助預測海平面上升速度) - https://polyu.me/4b7ImmY  

PolyU Osaka Study Tour 2025

From 4 to 10 January 2025, a group of 24 LSGI students, led by Prof. Wallace Lai, Prof. Qing Pei, Miss Stella Tse from Department of Land Surveying and Geo-Informatics (LSGI) visited Osaka and Kyoto for a 7-day study tour supported by the university. The aim of this tour was to explore the elements of spatial data science and smart cities.    At the Osaka City Abeno Disaster Prevention Center, students engaged in practical exercises that illustrated the importance of disaster preparedness. They learned why cars should not be used during a tsunami, experienced how an Earthquake shakes the Earth in a simulator, and practiced how to 'crawl' properly amid heavy smoke. Prof. Pei-liang Xu from the Disaster Prevention Institute at Kyoto University provided valuable insights into Japan's earthquake warning system, which utilizes a sophisticated network of spatial data science and technologies, including GNSS, GIS, remote sensing, geodesy, and seismology. He emphasized the philosophical dimension of disaster research, urging students to critically question scientific claims with the challenge: "Don't trust what 'Science' or 'Nature' tells you. If you care, question it and prove it yourself." The exploration of "Disaster" extended to its man-made dimensions through discussions led by Prof. Keiji Yano, Institute of Disaster Mitigation for Urban Cultural Heritage from Ritsumeikan University, who introduced his 20 years of effort on 'Virtual Kyoto'. It aims to preserve the rich Kyoto's cultural heritage from various disasters via technologies like GIS, cartography, aerial photogrammetry, laser scanning, and AI. This initiative highlights the power of a map, which is not just a large piece of paper, but a vivid story-telling vehicle recording our past and present leading us to the future. In a world where heritage is endangered, mitigation and preservation of heritage from disaster are a serious matter of humanity and should be made known to everyone. The students were stunned at how the techs they have been learning in LSGI are so closely related to humanities and heritage conservation, traditionally perceived as separate domains.    The tour also included a visit to the Kyoto Museum for World Peace led by Prof. Keiji Yano. It is a solemn place where facets of war should be presented in a multitude of ways aimed at avoiding it. Ms. Miki Taguwa, the curator of the museum, kindly guided the students through the various peace-making exhibits.  With the assistance of Dr. Pei Qing's excellent Japanese translation, Prof. Wallace Lai was able to explain the discovery of WWII fortification and field positions in his 'Geo-project 1941' originated from the Battle of Hong Kong.    This study tour not only broadened our students' understanding of disaster mitigation but also illuminated the profound interconnectedness of science, technology, and the humanities in addressing the challenges faced by society. 

PolyU Tokyo Study Tour 2025

A group of 21 students from the Department of Land Surveying and Geo-Informatics (LSGI) at the Hong Kong Polytechnic University (PolyU), led by Prof. Wu Chen, Head of Department, Dr. Sissi Chen, Lecturer, and Ms. Serein Han, Scientific Officer from LSGI, participated in a study tour in Tokyo from 4 to 10, January 2025. The National Museum of Nature and Science gave a great look at the natural world and science. The exhibits on biodiversity and the history of life on Earth were very interesting. They reminded us of the balance that keeps our planet going. Visiting Metropolitan Area Outer Underground Discharge Channel is one of the tour's highlight, known as the "Underground Temple". This critical flood management infrastructure demonstrated the extensive efforts required to protect urban areas from natural disasters through big tunnels. Prof. Wu Chen, posed thought-provoking questions regarding the channel's maintenance and operational methods: "What is the cleaning method and period?" "Why was this channel built hermetically?", and "How often will inspections be done?" These questions deepen the understanding of such a monumental engineering project. This visit showed the critical role of innovative engineering in creating urban environments, highlighting how such advancements are essential for the sustainable development of strong cities.  The Tokyo Sewerage Museum ‘Rainbow’ gave a good look at the systems that support city life. Learning about wastewater treatment and sewerage management showed us the complex processes that are important for public health and the environment. This visit made us think more about how our daily habits affect these systems and the environment. At the Miraikan, we was inspired by how technology can shape our future. The exhibits on robotics, space exploration, aging in Japan and artificial intelligence were interesting and made us think about the ethical side of technological advancements. This visit made us think about how we can use innovation to solve global problems and make sure everyone benefits. The Narusawa Mt. Fuji Museum gave a different view, focusing on the natural beauty and geological importance of Mt. Fuji. The exhibits on volcanic activity and the cultural importance of Mt. Fuji made us appreciate this landmark more.  The tour provided a profound exploration of the intersections of nature, technology, and culture. Participants expressed their gratitude for the opportunity to engage with these remarkable sites and enthusiasm for applying their newly acquired insights to foster personal growth and a broader understanding of the world. 

Prof. Jianli Chen Elected as AGU Fellow

Prof. Jianli Chen, a full professor in the Department of Land Surveying and Geo-Informatics at The Hong Kong Polytechnic University, has been elected as an AGU Fellow. Prior to joining PolyU under the Strategic Hiring Scheme in 2022, Prof. Chen dedicated 28 years of his academic career to the Center for Space Research at the University of Texas at Austin. He is a globally recognized expert in space geodesy and its applications in Earth sciences. In 2005, he received the Presidential Early Career Awards for Scientists and Engineers (PECASE), the highest honor in the United States for early career scientists and engineers, making him the first recipient in the field of geodesy. Prof. Chen joins a prestigious group of 54 individuals in the 2024 Class of AGU Fellows. The American Geophysical Union (AGU), the world's largest Earth and space science association, annually bestows this honor on a select number of individuals who have made exceptional contributions to their fields. Since its inception in 1962, less than 0.1% of AGU members have been selected as Fellows each year. AGU Fellows are recognized for their scientific eminence, demonstrated through breakthroughs, discoveries, or innovations that advance Earth and space sciences. They also serve as external experts, advising government agencies and other organizations upon request. Prof. Chen was selected for his exemplary leadership and outstanding scientific achievements, which have significantly advanced our understanding of space geodesy and global climate change. Prof. Chen has been extensively involved in data processing, results validation, and geophysical interpretation of the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. He is a leading science team member of both the GRACE and GRACE Follow-On missions. His pioneering contributions to the study of global sea level rise, glacial melting, terrestrial water storage change, and groundwater depletion using GRACE/GRACE-FO satellite gravity measurements and other geodetic observations have been widely recognized. His research has been covered by numerous media outlets worldwide, including USA Today, BBC News, The Washington Post, Discovery News, National Geographic, ABC (Australia), New Scientist, China Daily, People’s Daily, and CCTV. "I am deeply honored and humbled to be elected as an AGU Fellow. This recognition is not only for myself but also for the people who have worked with and supported me over the years. It motivates me to continue striving for excellence in my research," said Prof. Jianli Chen. Honorees was recognized at AGU24, which convened more than 25,000 attendees from over 100 countries in Washington, D.C., and online from December 9-13, 2024. Reflecting the theme 'What's Next for Science,' the Honors Reception celebrated groundbreaking achievements that illustrate the continual advancement of science, inspiring the AGU community with their stories and successes. Prof. Chen was also invited and attended AGU 2024 Honors Ceremony as AGU Union Member 2024, for outstanding achievements and sea level and climate research, terrestrial Waters and Earth-rotation using space geodesy techniques. Watch the 2024 honors ceremony recording here: https://www.agu.org/honors/ceremony (35:24 - 35:46)

MOU signing between PolyU LSGI and AMap

On 16 December 2024, a delegation from AMap (高德地图) visited the Department of Land Surveying and Geo-Informatics (LSGI) at The Hong Kong Polytechnic University (PolyU) for a significant signing ceremony. This event marked the formalisation of a Memorandum of Understanding (MoU) between the two parties, aimed at fostering collaboration in research development and technology transfer within the Greater Bay Area (GBA). The delegation from AMap was warmly welcomed by Professor Chen Wu, Head of LSGI, along with Dr Xu Yang, Associate Professor, and other esteemed academic staff members. The MoU outlines a strategic partnership focusing on areas such as smart mobility, tourism, and urban infrastructure planning. Both parties are enthusiastic about exploring opportunities for education and student training within the geospatial industry, further strengthening ties between academia and industry. The signing of the MoU signifies the beginning of a long-term collaboration between LSGI and AMap, bringing together pioneers in geospatial technologies and smart city development.   Participating Guests from AMap: •           Mr Deng Yu, Head of User Growth & Data •           Mr Yang Hao, Head of International Maps •           Ms Zhang Sha, User & Data Operations Supervisor •           Mr Ren Yue, Product Manager •           Ms Liang Shuang, Business Manager •           Mr He Gengen, Map Consultant   Representatives from PolyU: •           Professor Chen Wu, Head of LSGI •           Dr Xu Yang, Associate Professor •           Dr Liu Xintao, Associate Professor •           Dr Zhuge Chengxiang, Assistant Professor   This collaboration promises to advance the frontiers of geospatial research and smart city solutions, benefiting both the academic community and the industry at large.

PolyU Tsinghua Study Tour 2024

From 5 to 11 December 2024, a group of 13 students from the Department of Land Surveying and Geo-Informatics (LSGI) and the Department of Chinese History and Culture (CHC) at the Polytechnic University of Hong Kong (PolyU) embarked on an enriching study tour to Beijing, China. This trip was conducted under the project "粵港澳大灣區戰略背景下京港應對氣候變化的政策機制比較與分析," led by Dr Pei Qing, Associate Professor from PolyU, and Prof. Wang Can from Tsinghua University. The project is sponsored by the “Ten Thousand People's Scheme” by the Ministry of Education of PR China. This year marks the fourth time the programme has run since its inception in 2017. During the tour, our students had the opportunity to visit Tsinghua University and engage in academic exchanges with esteemed professors.   During the opening ceremony on Dec 06, Professor Wang presented a lecture to comprehensively introduce the key concepts, theories and methodologies under the current “Carbon Peak and Carbon Neutrality: Background and Pathway” in China, which could be summarized as “Dual Carbon” goal. After the presentation by Professor Wang, the students had a warm discussion and interaction according to the lecture content.   On Dec 09, Mr Zhang Binliang (张斌亮), the General Manager of SinoCarbon Innovation & Investment Co., Ltd, was invited to give a sharing on “Opportunities and Challenges for the Development of the Global Carbon Trading Market in the Context of Carbon Neutrality.” His insights helped students gain a deeper understanding of carbon trading as a crucial strategy for achieving carbon neutrality. Additionally, students participated in practical carbon market trading sessions.    On Dec 10, the students joined the course entitled “Climate Change Economics” by Professor Wenjia Cai in Tsinghua University. During the course, the students learnt the latest progress of climate negotiation and climate politics.   Beyond academic exchanges, the students explored the rich history and culture of mainland China. They visited several iconic sites, including the Tsinghua University Art Museum, the Palace Museum, and the Badaling Great Wall. This study tour offered the students a valuable and comprehensive learning experience.   On Dec 11, the closing ceremony of the project was held at the School of Environment, Tsinghua University. Each student shared their experiences, combining their academic specialisations with the insights gained during the week. After this trip, they not only gained a deeper and more concrete understanding of "Dual Carbon" goal and climate change, but also became acutely aware that the climate crisis is upon us. They are committed to continuing their focus on global environmental issues and hope to start by applying their knowledge to promote environmental awareness and contribute to efforts in combating climate change.    We extend our heartfelt gratitude to Professor Wang, staff and students of Tsinghua University for their warm hospitality. This study tour has equipped PolyU students with the knowledge and experiences necessary to make meaningful contributions to the fields of climate change and sustainability in their future academic and professional pursuits.

AsiaCarto 2024: A Landmark Event in Cartographic Research

The inaugural Asian Cartographic Conference, AsiaCarto 2024, co-hosted by the International Cartographic Association (ICA) and The Hong Kong Polytechnic University (PolyU), concluded with resounding success on December 9-10. The Department of Land Surveying and Geo-Informatics (LSGI) was proud to be one of the sponsors of this groundbreaking event, which took place at PolyU. The conference attracted over 200 map enthusiasts and experts from more than 30 countries and regions, highlighting the global interest in cartographic studies. With nearly 300 paper submissions and over 120 engaging presentations, participants delved into the latest advancements in map studies and explored the future of the field. Prof. Jin-Guang Teng, President of PolyU, warmly welcomed all participants and guests on behalf of the organizers. The presence of the distinguished guests was one of the highlights of the conference: Ms. Bernadette Linn, JP, Secretary for Development, Development Bureau, and ICA President Prof. Georg Gartner. Their participation underscored the conference's significance and its impact on the global stage. Ms. Linn's involvement emphasized the importance of cartography in regional development and urban planning, while Prof. Gartner's presence reinforced the conference's alignment with international standards and innovations in cartographic research. During the closing ceremony, several prestigious awards were presented, including 19 ICA Scholarship Awards, 15 AsiaCarto Best Student Presentation Awards, and 3 AsiaCarto Travel Awards. These accolades celebrated outstanding contributions and promising research in the field of cartography. LSGI was thrilled to witness the dynamic discussions and fruitful exchanges that took place, underscoring the strength of Asian cartographic research and fostering international academic collaborations. The conference provided a vital platform for professionals and those in related disciplines to engage in discussions, exchange ideas, and stimulate research and joint projects in Cartography and GIScience. The conference showcased the critical role of cartography in shaping future landscapes and fostering global cooperation. LSGI looks forward to continuing its support for initiatives that advance the field of cartography and promote international collaboration.

PolyU LSGI STEAM Talks for Secondary Schools Students 2025

The Department of Land Surveying and Geo-Informatics (LSGI) is organizing a STEAM Talk Series with the aim of introducing daily life applications and potential developments in Geo-Informatics. The series will cover a wide range of topics, including Land Surveying, Remote Sensing, Global Positioning System (GPS), Global Navigation Satellite System (GNSS), Geographic Information Science (GIS), and Underground Utilities Imaging and Diagnosis. We are delighted to invite all secondary schools to participate in our STEAM Talk Series in 2025. STEAM Talk Series Topics: Smart City and 3D Mapping in HK (智慧城巿及三維地圖的應用) Global Navigation Satellite System (GNSS) and Smart City Applications (全球導航衛星系統與智慧城市應用) Unfolding HK Lost WWII Heritage with Geo-spatial Science (尋找隱世二戰遺跡：地理空間科學篇) Problem Solving by Digital Maps and Geographic Information System (GIS) (以數字地圖和地理訊息系統解難) Seeing and Unseen Underground Utilities in 3D (三維地下管線測量) Observing and Measuring the Earth from Space (從太空觀測地球) IoT and Remote Sensing for Tree Monitoring (如何利用IoT及遙感技術監測城市樹木) Date:   From January to July 2025 (exact date to be suggested by school) Target audience:   S.1 – S.6 Students (both Art and Science students are welcome) Medium:   Cantonese or English Venue:   Secondary School or PolyU (a lab tour to be arranged at PolyU) Speaker:   Academic Staff from the Department of LSGI Please click here to know more the description for the STEAM talk topics. Interested parties please fill in the online application form to indicate your preference of talk. For any questions, please feel free to contact Mr Jimmy Kwan at 2766 4350 or jimmy.lh.kwan@polyu.edu.hk. Please find more about LSGI at our Facebook or Youtube channel.  LSGI Undergraduate Programme in 2025/26 BSc (Hons) Scheme in Spatial Data Science and Smart Cities (JS3130)

LSGI Students Shine at RICS Hong Kong 2024 Student Awards Ceremony

On December 4, 2024, the RICS Hong Kong Student Awards Ceremony celebrated the outstanding achievements of students in the field of surveying and geospatial sciences. Among the honorees were three exceptional students from the Department of Land Surveying and Geo-Informatics (LSGI) who received prestigious awards for their academic excellence and contributions to the field. YIN Ruoxin, LSGI Bachelor programme student, along with ZHANG Ouwen and CHEUNG Cho Kwan from the Master of Science of Geomatics programme, were awarded for their exemplary work and dedication. Prof. Joseph Awange, new Professor of LSGI who also attended to support and celebrate the accomplishments of the students. Prof. Awange expressed his pride in the students' achievements and emphasized the importance of their contributions to the industry in future. The recognition of YIN Ruoxin, ZHANG Ouwen, and CHEUNG Cho Kwan reflects the department's dedication to fostering talented individuals who are ready to positively impact their chosen fields. Congratulations to YIN Ruoxin, ZHANG Ouwen, and CHEUNG Cho Kwan on their well-deserved awards.