Last week I linked to this webpage which shows an interesting task 1 question. Now let's write our essay step by step. I'll write the first 2 paragraphs today, and the rest next week.
1. Introduction: As usual, we can start the essay by paraphrasing the question (rewrite the question in your own words).
The two maps below show an island, before and after the construction of some tourist facilities.
The diagrams illustrate some changes to a small island which has been developed for tourism.
2. Overview: For our second paragraph we need to summarise the information in a couple of sentences. When comparing diagrams, we can count the number of changes and look for the main types of changes.
It is clear that the island has changed considerably with the introduction of tourism, and six new features can be seen in the second diagram. The main developments are that the island is accessible and visitors have somewhere to stay.