An author studies maps and diary entries made by Columbus his crew on their journeys of exploration He writes a book interpreting the meaning behind these records what type data?

This is a great example of primary data being analyzed to produce secondary data.

Here's why:

* Primary Data: The maps and diary entries made by Columbus and his crew are considered primary data. This is because they are original sources of information created at the time of the events they describe.

* Secondary Data: The author's book, which interprets the meaning behind these primary sources, is considered secondary data. It's based on and derived from the primary data, but it provides a new interpretation and analysis.

In essence, the author is taking raw, original information (primary data) and adding their own analysis, insights, and perspectives to create a new piece of knowledge (secondary data).