| Definition | Term |
| A landform made up of nearly flat or gently rolling land with low relief | |
| The difference in elevation between the highest and lowest parts of an area | |
| Distance in degrees east or west of the prime meridian | |
| The study of the shape of the land | |
| The change in elevation from contour line to contour line | |
| Any object, natural or manmade, that orbits Earth | |
| Process by which mapmakers convert the location of map points to numbers | |
| A landform that has high elevation and a more or less level surface | |
| A sphere that represents Earth's entire surface | |
| Imaginary line that divides Earth into the Eastern and Western hemispheres | |
| 1/360 of the distance around a circle | |