Plan and conduct a fieldwork investigation of a local land cover transformation using the geographic inquiry model and primary data collection

What this dot point is asking

This is the Topic 2 and IA2 skills dot point. QCAA wants you to plan and carry out a fieldwork investigation of a local land cover transformation using the geographic inquiry model, collecting your own primary data. You are assessed on the whole chain: a sharp question, an appropriate method, reliable data, and later the analysis and management response. This page focuses on framing the inquiry and collecting good data. Strong responses choose a genuinely local and manageable transformation, match the method to the question, sample systematically, and document everything so the data is reliable and the conclusions defensible.

The answer

The geographic inquiry model

The inquiry model gives your investigation a structure that examiners and the field report follow:

1. Observe and question. Notice a local land cover change and frame a focused geographical question.
2. Collect and record data. Gather primary data in the field and relevant secondary data.
3. Represent and analyse. Turn data into maps, graphs and tables and identify patterns.
4. Draw conclusions. Explain what the data shows about the transformation and its impacts.
5. Propose and evaluate action. Recommend a management response and judge it against criteria.

This page covers stages one and two; representation, conclusions and responses are the later dot points.

Framing a focused question

A strong investigation begins with a focused, answerable geographical question about a local transformation. "Is land cover change bad?" is too broad. "How has riparian vegetation cover along this section of creek changed since the new housing estate, and what is the impact on bank stability?" is focused, local, and measurable. The question should specify a place, a type of land cover change, and an impact you can investigate with the time and tools you have.

Primary versus secondary data

Primary data is data you collect yourself in the field. Secondary data is data others have already produced. The field report is built on primary data, with secondary data providing context.

• Primary: transect surveys, quadrat counts, land cover percentage estimates, field sketches, photographs, temperature and infiltration measurements, questionnaires and observations.
• Secondary: census and demographic data, topographic and cadastral maps, satellite and aerial imagery, council planning documents and historical photographs.

Field techniques

• Transect. A line across the area along which you record land cover or other variables at set intervals, ideal for showing change across a gradient such as from creek to housing.
• Quadrat. A fixed-area frame within which you count or estimate cover of vegetation types, good for sampling ground cover systematically.
• Land cover survey. Recording the percentage of each cover type at sample points to map the current mosaic.
• Field sketch and annotated photograph. A drawn or photographed record with labels identifying features and changes.
• Questionnaire and survey. Gathering residents' or users' observations and perceptions of the change.
• Measurements. Soil infiltration, surface temperature, slope and water quality where relevant to the transformation.

Sampling and reliability

You cannot measure everywhere, so you sample. Systematic sampling (every set distance or at a regular grid) gives even coverage and reveals gradients; random sampling reduces bias; stratified sampling ensures each cover type is represented. Record the exact location of each sample with a grid reference or coordinates so the data is mappable and repeatable. Note conditions, dates and any limitations (small sample, access restrictions, seasonal effects) because acknowledging limitations is part of a high-quality report.

Examples in context

Example 1. Urban creek riparian zone. A transect from a new housing estate to a creek, with quadrats sampling ground cover at intervals, measures how vegetation cover and bank condition change with distance from development.

Example 2. Coastal dune transformation. Quadrats and a profile transect across a dune system before and after a built path or vehicle access record loss of stabilising vegetation and bare sand exposure.

Example 3. Peri-urban clearing for a subdivision. A land cover survey at systematic grid points, supported by historical aerial photographs, measures the conversion of bushland to cleared lots and quantifies remnant vegetation retained.