Lesson 2 - The Eight Layers of The National Map

In this lesson, we will discuss each of the eight base layers of The National Map (TNM). Understanding the content of each layer, where the data comes from, and how this information is managed, is an important step in better utilizing The National Map and its products and services.

Timestamps:

0:46 - Introduction
3:48 – Elevation
9:37 – Hydrography
14:32 – Geographic Names
17:55 – Land Cover
21:14 – Boundaries
24:34 – Transportation
26:18 – Structures
29:53 – Orthoimagery
32:32 – Conclusion
33:36 – Accessing TNM Data