IELTS Writing Task 1: how to describe process diagrams and maps

Process diagrams and maps are the Task 1 visuals with no graph lines to follow. There is nothing to rank and no trend to name, so candidates who have practised only charts often start describing from the top left and keep going until the words run out. The skill here is different: you need to show order for a process and change for a map. This guide covers both, with a shape, the language each needs and the traps.

What IELTS.org says

IELTS.org’s Academic Writing format page says Task 1 may be a diagram of an object, device, process or event, and that you describe it in your own words in at least 150 words. It also says that in Task 1 you must include the most important points, that some minor points or details may be left out, and that the task tests whether you can give a well-organised overview using language suited to the register. For this kind of visual the page lists describing the stages of a process or procedure, describing an object, event or sequence of events, and explaining how something works.

Maps are not mentioned on the page. They are common in practice material and fit the same wording, so the sensible assumption is that a map is a visual you describe with the same criteria. IELTS publishes no figures on how often a map or a process appears, so do not guess at it. The page also says all the information you need is in the visual, so add nothing from outside it. The whole format is set out in the IELTS Writing test format guide.

What the descriptor asks

The site’s Writing band descriptors explorer paraphrases Task Achievement for Task 1. At band 6, the report gives a summary of the overall picture, the information you chose is the right information, and the main features stand out. Some detail may be badly chosen or may not match the visual. At band 7, the summary states the main movements, contrasts or stages so that a reader does not have to hunt for it, and the key features are clearly presented. The explorer’s examples use charts, but its descriptions of overview, selection and accuracy carry over: for a process, the stages are the features, and for a map, the changes are.

Process diagrams

Natural and man-made processes

A process diagram shows either something that happens in nature, such as the life cycle of an insect, or something people make or do, such as how bricks are manufactured. A natural cycle may have no beginning, so choose a starting point and say so.

A shape for the report

1. Introduction. One sentence saying what the diagram shows, paraphrased.
2. Overview. The number of stages, where the process starts and ends, and anything that stands out, such as a loop or two stages that run together.
3. Detail one. The first half of the stages in order.
4. Detail two. The second half, finishing at the end product or the point where the cycle returns.

Count the stages before you write, because the count goes in your overview and a miscount is a mistake in plain sight.

Sequence and the passive

A process has no data to compare, so the language is order and action. Use sequence words that vary: first, next, then, after that, once this has happened, following this, finally. Use “while” or “at the same time” for stages that run together. The passive fits because the diagram cares about what happens to the material, not who does it: “The clay is crushed”, “the bricks are then dried”. Use the present simple for a process that happens in general.

An invented example

This example is invented for illustration. The diagram shows six stages in making bricks: clay is dug, crushed, mixed with water, shaped in moulds, dried, then fired in a kiln, and the bricks are cooled and delivered.

Introduction: “The diagram illustrates how bricks are produced, from the extraction of clay to the delivery of the finished product.”

Overview: “Overall, the process has six main stages, beginning with the digging of clay and ending with cooling and delivery.”

The first detail paragraph would cover digging, crushing and mixing: “First, clay is dug from the ground. It is then crushed into small pieces and mixed with water until it forms a paste.” The second would cover moulding, drying, firing and cooling, with a sequence word at each change. Notice there is no opinion, no numbers beyond the ones the diagram shows, and no copying of the diagram’s labels word for word.

Maps

What a map task asks for

A map task usually shows a place at two or more dates, or a place now and a proposed plan for it. The job is to report what changed, what stayed the same and where. IELTS.org does not say how many features you must mention, so choose the changes that carry the picture: the biggest, the ones that alter how the place is used, and anything that stands out.

A shape for the report

1. Introduction. What the maps show, where, and the dates.
2. Overview. Two sentences on the main changes and what remained.
3. Detail one. Changes in one area, or one kind of change.
4. Detail two. The other area, or the features that stayed the same.

You can organise by area, such as the north and the south of the map, or by type, such as what was removed, what was added and what stayed. Pick one and keep to it.

Location and change language

For location: to the north of, in the centre, next to, opposite, along the river, between the school and the road. For change: was demolished, was replaced by, was converted into, was extended, was built, remained unchanged, no longer existed. Check the compass on the map before you write a direction, because a north–south mix-up is an accuracy error.

Tense

Use the past for maps showing past dates, “will be” or “is planned to” for a proposal, and the present for a map of a place now. If the maps show 1990 and 2020, the past simple works for both dates. Consistent and correct is better than varied and wrong.

An invented example

This example is invented for illustration. A village map for 1990 shows a school, a market square and farmland east of the river. The map for 2020 shows the school extended, a car park where the market square stood, a housing estate on the farmland and a new bridge.

Overview: “Overall, the village became more built up between 1990 and 2020, with farmland giving way to housing, while the school and the river remained where they were.”

Detail one, in outline: the western side, the extension of the school and the replacement of the market square by a car park. Detail two: the eastern side, the housing estate on the former farmland and the bridge that links it to the village centre.

Traps

• Describing the picture in the order you see it. A report that moves left to right with no overview shows no selection.
• Missing a stage or a change. One lost stage breaks the sequence, and a missed map change leaves the overview untrue.
• Repeating “then”. Vary the sequence words, and use “while” where two things happen together.
• Wrong direction or wrong tense. Both are accuracy errors, and both come from not checking the visual.
• Explaining why. The visual does not say why the market was replaced, so do not guess.
• Judging the result. “Fortunately, the bridge improved the village” is an opinion the task does not ask for.
• Copying labels. Use your own words for what the labels name.
• Writing under 150 words. IELTS.org says a short answer may not give enough evidence of the language needed for higher bands.

Telling a misread visual from a language mistake

Many lost marks on this task come from reading, not writing: a stage out of order, a feature in the wrong place, a change you invented. Others come from language, such as a wrong tense or a missing passive. In IELTS Mentor AI, the Data Accuracy card in the Task 1 feedback separates a misreading of the chart from a language mistake, and that is the same distinction to make when you check a process or map answer yourself.

Where this fits

The data visuals have their own page: charts, graphs and tables, and the earlier post on maps, charts and tables works through the overview. Both are for Academic. For the other version of Task 1, see the guide to the General Training letter.