Look at the top right of this area on the Sectional Chart from North Dakota. You'll see two lines with 101° and 48° alongside each line, respectively. The 101° is a longitudinal (vertical) line and measures to the left and right (west and east). The 48° is a latitudinal (horizontal) line and measures up and down (north and south). What do the 101° and 48° lines represent on the Sectional Chart?
1) Latitude and longitude lines
2) Elevation lines
3) Airports and runways
4) Highways and roads