Читать книгу Imagery and GIS - Kass Green - Страница 60

Chapter 3 introduced the characteristics that differentiate the types of imagery available to civilians. This chapter examines those characteristics through the eyes of the image user, first by presenting a framework for matching imagery characteristics to user requirements so as to ensure the best imagery is chosen for each project, and then by describing and cataloging the wide variety of imagery datasets available at the time of the printing of this book. However, please be aware that the supply of both public and commercial imagery is very dynamic and constantly changing, especially with the advent of unmanned aerial systems (UASs) and small-payload earth observing satellites (often referred to as cubesats, microsats, or smallsats). There is a high probability that new imagery sources have arisen and others have failed since this book has been published.