GEORGE TOWN: Using satellite remote sensing technology to monitor urban tree health is delivering results, with 3,736 trees identified for monitoring and further action.
Of these, 167 were flagged as critical, with on-site inspections conducted and action taken on 31 trees, said Penang Island City Council (MBPP) mayor Datuk A. Rajendran.
He said the “Smart Sight Tree” system integrates tree inventory mapping with spectral health analytics into a single dashboard, supporting decision-making and strengthening data-driven city management.
The RM988,000 project covers 44 sq km in the north-east district and involves 12,531 trees.
It runs until July this year, with satellite data accuracy of up to 94%.
“It allows our teams to visualise data clearly and act early, instead of responding after incidents occur.
“The study uses high-resolution multispectral satellite imagery collected between 2023 and 2025 to analyse both external and internal tree structures, including foliage, providing an overall picture of tree health.
“The method also considers physiological characteristics, species and environmental stress to deliver a comprehensive assessment.
“Further verification is carried out on site using physical and invasive tools such as resistograph drills and tomographs,” he said at the launch of the system website at Town Hall in Jalan Padang Kota Lama yesterday.
Rajendran said findings from the system would guide phased action plans through the first quarter of 2027, including field inspections, mitigation and maintenance works, as well as the felling and replacement of high-risk trees.
In a related development, he said the council carried out plant healthcare works on 1,215 trees in 2024 and 2025, including treatment for termites, insects and fungi.
Tree felling based on technical assessments involved 131 trees in 2024; 293 in 2025 and 89 so far in 2026, he added.
Rajendran said many urban trees are ageing, with an estimated average age of about 80 years, and 10% to 20% believed to be over 100 years old.
He said road widening and drainage works have affected the root systems of many roadside trees, increasing safety risks.
MBPP currently has three arborists, and the new system will help prioritise trees requiring urgent inspection.
State local government and town and country planning committee chairman H’ng Mooi Lye said advanced monitoring tools would enable more accurate and comprehensive assessment of tree health, including aspects not visible during on-site inspections.
“The data allows us to identify high-risk trees early and take proactive measures such as maintenance, treatment or controlled felling,” he said, adding that it improves efficiency, reduces incidents and supports long-term urban planning.
H’ng said the council will also conduct a study this year using Light Detection and Ranging technology to capture 360-degree imagery and tree data for a Smart Tree Inventory, supported by artificial intelligence.
He added that last year, the council maintained 40,144 trees, with 1,484 cases of broken branches or fallen trees recorded.
“As of May 5, 16,725 trees have been maintained, with 46 such incidents reported,” he said.
Also present was Penang infrastructure, transport and digital committee chairman Zairil Khir Johari.
