Aerial photography has been around for a long while, where photographers would take beautiful photographs from a helicopter or a small plane. These days it has become even more popular with the introduction of drones to the market. Altitude Imaging is usually done for many reasons like art photography or surveying the landscape or city development etc. The recent article that appeared in www.theguardian.com states that choosing an unusual angle to shoot your photos can give them an ethereal look.
Gone are the days when the desk based research was enough for any kind of research. These days aerial photography has become quite crucial to researchers in almost all fields. There are several different elements to be considered in an aerial survey to make sure that the information collected is useful to the research. Aerial photography has been used in archeology for more than a century and has evolved over the past few years. With the added technology of GIS, it means that aerial photography will be around for a long time to come. Most of the time researchers prefer to have black and white images taken, as they are cheaper as well as much easier to pick out features because of the contrast. There are two types of aerial photographs usually taken as seen below:
These photographs are taken at which angle serves the best view of the landscape or feature. It is around usually 45 degrees. These kinds of images are used to get a broader context of a particular feature or the area around it in archeology. They are also taken at a lower elevation and in fewer numbers since its usage is quite limited. In this particular perspective, a problem that arises is that the image is that the feature will be smaller than it appears in the photograph. Most researchers prefer oblique images to be taken during the winter season, as it is easier to view the features then.
This is the more popular form of aerial photography. Since the plan view is used, there is perspective distortion in the photographs. Although, it makes it difficult for the researchers to understand the change in the land height, as it is not visible in the top view used. This type of aerial photography is not used much in archeology as it focuses more on the topography. Vertical photographs are easier to understand than oblique images. Interestingly the best vertical images are taken during the winter season. As the altitude increases, sometimes the soil marks and crops might be missed, so experts suggest sticking to a lower altitude to get clearer images.
Applications Of Aerial Photography
Aerial photography has been found to be useful in several disciplines like
· Checking for crop marks
· Checking for soil marks
· Low profile monuments
· Research in urban development
· Planning new roads
· Developing townships
· Understanding climate change
· Geology studies and so on
With the advances in technology, aerial technology has improved a lot over the years, making it very useful is several fields for several different uses.