| A | B |
|---|
| Topography | Shape and elevation of the land |
| Topographic Maps | Contain contour lines and symbols that helps us visualize the shape, slope and features of the earth |
| Elevation | height above or below datum-sea level. |
| slope | Difference in the elevation of 2 points on a map divided by the distance |
| Local relief | Difference in elevation of 2 specified points on a Topo Map |
| Total Relief | Difference in elevation between the highest and lowest points on Topo map |
| Scale | Is the ratio of the distance on the map to the actual distance on the earth |
| large scale | small area but greater detail. The larger the value of the fraction, the larger the scale i.e 1:24000 |
| small scale | larger area but less detail. The larger the denominator the smaller the scale. i.e 1:250,000 |
| Depression | downward slope. Indicated on the map by concentric circles with inward hachure marks |
| Hill | less than 2000 ft/610 m |
| Mountain | 2000 ft or more/611 m or more |
| Hachure marks | Marks on the contour line that indicate downward slope |
| landforms | hills, valleys, canyons, plateaus or surface features of earth |
| magnetic declination | difference between true north and magnetic north |
| USGS | US Geological Survey |
| TN | True North or Geographic North |
| MN | Magnetic North |
| Fractional Scale | Written on the map as a ratio ex. 1:24000 means 1 unit on the map is equal to 24000 of the same units on earth |
| Bar or Graphic scale | Shows a measurement of the distance on the map to the actual distance on earth. |
