Aerial View Maps

What are the advantages and disadvantages of aerial photos & topographic maps in the study of earths surface?

I just need like a paragraph...maybe 1 advantage and disadvantage for each,

Public Comments

1. Aerial photographs provide a real image of the ground surface. The advantage of using an image is that it allows some level of interpretation of rock types and structural geology, vegetation types and amount of cover. The disadvantage of using an aerial photo is that is is a distorted image. It needs spherical correction to be converted into ground or map coordinates. Topographic maps have the advantage that they allow differences in elevation to be read directly from the contours of the map. They, unlike the aerial photograph, are not spatially distorted. The disadvantage of a topographic map is that it doesn't contain any information of rock, soil or vegetation types.