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