Change Detection in Complex Vegetation Communities

Underground » Environment - Subsidence and Mine Water

Published: August 19Project Number: C25056

Get ReportAuthor: Andrew Fletcher, Richard Mather, Tony Cable | Queensland University of Technology, Buckinghamshire New University, Biosis

This project develops and demonstrates methods to introduce UAV sourced remote sensing products for monitoring and reporting change in complex vegetation communities. Multicamera rigs collecting single narrow spectral bands reconstructed the most complete tree canopy models while providing imagery for recording vegetation type.

Near Infrared and red edge imagery reconstruct tree and vegetation features while red band images reconstruct ground and near ground features. Imagery captured at 87% forward: 80% side lap and 80m above ground level generated 7-8cm resolution products that were able to detect mortality in branches of single shrubs while reconstructing tree canopies >35m above ground level. Geolocated field photos and transect intercept records are suitable for training and validation but location inaccuracy prevents use of quadrat based assessment. Dispersed ground reference marks (<150m) recorded at survey grade are required for monitoring at sub-decimetre resolutions (8cm).

The first complete and direct community boundary mapping using dense point clouds improved accuracy by 2-3fold with 90% of field ecological boundary locations within measurement error. Baseline dense point vegetation reconstruction varied by approximately 1% but by combining image sets collected at different times of day 3D vegetation reconstruction differences were <4% between seasons and it was possible to extract reproducible high resolution (0.16m GSD) canopy height models. Shadow and variable illumination affect reconstruction and classification of very high resolution imagery.

This project merged three normalised vegetation indices to reduce the impact of shadows on classification accuracy. Processed imagery and digital surface models were used for an ensemble of machine learning and statistical classification algorithms. Training data was constructed from air photo interpretation of high resolution RGB products supported by geolocated field photos. Industry standard (ArcGIS) and open source (R-GDAL) software workflow tools were explored and classification workflows validated using Neural Networks, Support Vector Machines, Decision Tree and Random Forest approaches.

A fully operational ArcGIS Toolbox using Machine Learning and Maximum Likelihood classifiers is delivered. The workflows report both accuracy and full confusion matrices for transparent comparison of methods. Cohen Kappa >0.9 were achieved for complex vegetation targets.

This report demonstrates the capability to detect between year changes in vegetation cover and tree canopy growth. Multiple epoch remote sensed imagery is essential to monitor complex communities. Bare ground, litter, senescent vegetation and water are simply classified and detection of Eucalyptus establishment is demonstrated.


Health and safety, productivity and environment initiatives.


Open Cut

Safety, productivity and the right to operate are priorities for open cut mine research.

Recently Completed Projects

C19024Establishing Ecologically Sustainable Mine Water Release Criteria In Seasonally Flowing Streams

Extreme rainfall conditions in the Fitzroy Catchment over an approxi...

C25030Coal Mine Open Pit Final Void Closure And Relinquishment - Addressing Uncertainty In Coal Mine Environmental Planning

This report addresses uncertainties faced by coal mine operators whe...

C27046Estimation Of True Deformation Vector From Slope Radar Monitoring

Slope deformation radar monitors are now widely used in open cut coa...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C16043Estimation Of Steady State And Dynamic Dense Medium Cyclone Performance

Please note that the simulator that forms part of this report i...

C27004Improving Coal Flotation With Oscillatory Air Supply

This report provides detailed information on coal flotation with os...

C25018Improving Solids Recovery And Moisture Reduction In Ultrafine Coal Dewatering

This report provides detailed information on fine coal dewatering in...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C26039Nanoporosity In Cokes: Their Origin, Control And Influence On CO2 Reactivity

This project using the outcomes of previous project C24060, examine...

C28063A Comprehensive Technical Review Of High-Efficiency Low-Emission (HELE) Pulverised Coal Combustion Technologies For Power Generation

Research and development has been undertaken worldwide to realise co...

C28064Carbon Structure Transformation During Coking Of Australian Coking Coals: Better Understanding The Coke Formation

Carbon structures of coke that are formed during the plastic layer a...

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C28076Selective Absorption Of Methane By Ionic Liquids (SAMIL) - Phase 2 Demonstration In A Packed Bed Reactor

An alternative approach to high temperature oxidation of ventilation...

C26004CFD Modelling Of Reverse Thermal Oxidisers For VAM Abatement - CFD Modelling Of Fixed-Bed RTO Devices

The project is part of a larger multi‐phase program of study a...

C27058Technological Assessment Of A Recycle Reactor For VAM Abatement

Underground coal mining emits high volumes of methane, diluted in ve...

Mine Site Greenhouse Gas Mitigation

Low Emission Coal Use

Step-change technologies aimed at reducing greenhouse gas emissions.

Recently Completed Projects

C17060BGasification Of Australian Coals

Four Australian coals were trialled in the Siemens 5 MWth pilot scale ga...

C17060AOxyfuel Technology For Carbon Capture And Storage Critical Clean Coal Technology - Interim Support

The status of oxy-fuel technology for first-generation plant is indicate...

C18007Review Of Underground Coal Gasification

This report consists of a broad review of underground coal gasification,...

Low Emission Coal Use

Mining And The Community

The relationship between mines and the local community.

Recently Completed Projects

C16027Assessing Housing And Labour Market Impacts Of Mining Developments In Bowen Basin Communities

The focus of this ACARP-funded project has been to identify a number...

C22029Understanding And Managing Cumulative Impacts Of Coal Mining And Other Land Uses In Regions With Diversified Economies

The coal industry operates in the context of competing land-uses that sh...

C23016Approval And Planning Assessment Of Black Coal Mines In NSW And Qld: A Review Of Economic Assessment Techniques

This reports on issues surrounding economic assessment and analysis ...

Mining And The Community


National Energy Research,Development & Demonstration Council (NERDDC) reports - pre 1992.

Recently Completed Projects

1609-C1609Self Heating of Spoil Piles from Open Cut Coal Mines

Self Heating of Spoil Piles from Open Cut Coal Mines

1301-C1301Stress Control Methods for Optimised Development...

Stress Control Methods for Optimised Development and Extraction Operations

0033-C1356Commissioned Report: Australian Thermal Coals...

Commissioned Report: Australian Thermal Coals - An Industry Handbook