16. Look at the various colors used on the map. These are standard colors set aside for specific use on all USGS topographic maps. What colors correspond with the following features on your map? a. contour lines b. water bodies c. vegetation d. man-made structures e. recently revised areas 17. Using the index for topographic symbols, draw the following features as they would be represented on a USGS topographic map: a. Bridge c. Intermittent stream b. Church d. Marsh