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Aerial photography and surveys are very much useful and important in now a day. It gives the true and magical view of the mapping activities. These provides a quick and bird eye view survey of the land from the air for which some mapping is required.
The indispensable approach of aerial video imaging surveys is to use a video camera to record land metaphors from an aerial podium. The procedure has gained attractiveness over the past ten years because of the ability of users to mold the metaphors to their particular relevance. In contrast to conventional aerial photography, (a) video imagery can be acquired from a wide variety of aircraft and is usually not ceiling limited (i.e., AVI flying altitude is usually much lower than that required for conventional aerial photography), (b) synchronous narrative descriptions of resources can be added, greatly enhancing the interpretative quality of the imagery and (c) the oblique imagery is similar to the view from an aircraft and easily interpreted by the lay-person. The major disadvantage in comparison to conventional aerial photography is that AVI can generally not be used for plan metric mapping without special attention to aircraft attitude during the survey.
Acquirement has inspired a wide range of applications to resource mapping within BC. The method is most appropriate to mapping linear features such as rivers, coastlines or pipelines that can be centered in the image.
An analysis of the presented surveys indicates three general classes of surveys have been conducted. The authors' reviewed hundreds of hours of overview or Reconnaissance AVI as part of legal action support for the greatest weakness of this type of metaphors are the lack of location information; the user is left to estimate the original flight line, based on features evident in the image. This technique is used by the map designers and also for the army point of view.
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