Distinguish primary data from secondary data.

In geographical studies, it is essential to distinguish between primary and secondary data. Primary data is original information collected firsthand through methods such as surveys, observations, or experiments during fieldwork. This data is specific to the enquiry and provides direct evidence. In contrast, secondary data refers to information that has already been collected and published by others, such as books, articles, or databases. Understanding the difference between these two types of data is crucial for evaluating the reliability and relevance of the information used in geographical enquiries.