Picture of Luke Leydon

Luke Leydon

Luke Leydon
Senior Project Manager

Mapping for Carbon Offsets: How Aerial Surveys Improve Carbon Sequestration.

Net zero and why it matters

Australians are no strangers to extreme weather. In recent years the north has often experienced flooding at the same time the south has faced severe bushfire risk. However, these extreme weather events are becoming more frequent, more chaotic and more violent, while becoming harder to predict and prepare for due to human-caused global warming. In response, the Australian government has committed to reach net zero greenhouse gas emissions by 2050. Hitting that target is not a slogan, it’s a necessary part of limiting global warming, reducing the risks of extreme weather, and protecting communities and the economy, while meeting our international obligations. Without deep, sustained cuts to emissions this decade the impacts we’re already seeing will only worsen, with longer fire seasons, fiercer heatwaves, heavier floods, rising sea levels and mounting pressure on ecosystems.

The ACCU Scheme

The Australian Carbon Credit Unit, or ACCU, is the unit used in Australia’s government-administered carbon markets. One ACCU represents the equivalent of one tonne of carbon dioxide avoided or removed from the atmosphere. Many organisations inevitably produce carbon through their daily operations, and the Australian Carbon Credit Unit Scheme allows those organisations to purchase these credits that offset carbon to help reach net-zero emissions. 

The ACCU scheme sits within the Emissions Reduction Fund framework, while the Clean Energy Regulator maintains the project register and oversees compliance and verification for registered projects. One of the main project types used to generate ACCUs is forest regeneration.

Before and after major flooding event

Forest regeneration projects

Forest regeneration projects involve planting trees in areas that have been cleared or where forest cover has been degraded or destroyed. Reforestation is a key strategy for reducing carbon emissions: in Q1 2023, forest regeneration activities generated 56% of Australia’s carbon credits. These projects rely on robust, repeatable evidence that trees are regrowing and storing carbon over time. Selecting the right sites is essential for reaching net zero, and aerial surveying plays a key role in the decision-making process. 

How Photomapping Helps

Accurate aerial surveying is a foundational requirement under Australia’s Carbon Farming Initiative Mapping. The document mandates that project proponents use geospatial mapping – including high-resolution aerial imagery and LiDAR to precisely map out project boundaries and carbon estimation areas, ensuring compliance with Emissions Reduction Fund regulations and reliable greenhouse-gas calculations. By capturing detailed vegetation structures, soil contours, and water features, aerial surveys provide a scientifically sound baseline for site suitability. This spatial intelligence helps determine that carbon offset initiatives – such as forest regeneration – are deployed in areas where tree growth is viable, monitored rigorously over time, and verified against on-ground data. 

Australia’s net-zero vision depends on more than targets; it demands action. We cannot afford offset programs that hand out credits without real carbon capture to back them up. Aerial surveying brings the scientific backing the ACCU needs. Detailed site mapping provides accurate baseline data and repeatable monitoring that quantifies genuine forest growth. By adopting these geospatial tools across carbon-offset projects, we safeguard taxpayer funds, provide confidence in carbon markets and drive measurable progress toward Australia’s 2050 goal of net-zero emissions. It’s time to put aerial surveying at the heart of our carbon-credit policy – Contact us to learn how Photomapping can partner with developers and ensure every project is delivering much needed carbon offset credits.