Terms Related to Aerial Surveying
Aerial surveying is mapping work done from studying an aerial photograph or image. This type of surveying is often used for large construction projects, archeology projects, mining projects, wildlife projects and even reconnaissance work. The point of providing an aerial survey is to give an overall view of a large area that can only be completely seen by air. Historically this work was done using hot air balloons, but today is accomplished using manned and unmanned aircraft and even satellite imagery. Below are some common terms for aerial surveying.
Topography – A special type of map that shows elevation differences. A map is drawn using a set of lines based on a set of elevation intervals. Topographic maps are usually designed from aerial views, which can give an overall view of the landscape. Changes in elevation are also sometimes further enhanced by coloring.
Geospatial Analysis – A type of geographic analysis that uses mathematics equations. For example, a satellite photo taken from the air includes no markers, such as distances. Geospatial analysis takes into account the height of the camera when creating an equation to find out the area of the land in the photo.
UAV – Short for Unmanned Aerial Vehicle. Once strictly the domain of the army, UAVs gained popularity with reconnaissance work. Some UAVs are used for commercial purposes, such as taking aerial photographs for aerial surveys.
Geological Map – A map that shows primarily geological features, such as mountains, lakes and important natural landmarks. These are usually designed from aerial surveys, which can provide accurate pictures of the overall area.