Here's a breakdown of why:

* Parts of the whole Earth: Maps represent the Earth's surface, which is a whole.

* At one time: Maps show the Earth's features and locations as they exist at a specific point in time.

There are many different types of maps, each designed for different purposes:

* World Maps: Show the entire Earth's surface.

* Continents Maps: Focus on a specific continent.

* Country Maps: Detail a single country.

* Regional Maps: Show a specific area within a country.

* City Maps: Illustrate the streets and landmarks of a city.

Let me know if you'd like to explore specific types of maps or have a particular drawing in mind.