Contour lines represent lines of equal height (elevation) above or below sea level. Contour lines can be useful when determining how steep or flat an area is. Contour lines are present on topographic maps. In addition, contours can be used in vector format in other software.
With this viewer, the user can define the area of their interest. For contour lines, on the side Data panel area, select Elevation Products (3DEP), and contours to download the zipped file. Upon unzipping, this file can be used in different softwares and may need to be clipped to your desired extent