Advantages and disadvantages of an aerial vertical photo and an aerial tilted photograph?

Real-estate agents, travellers and others use aerial Photography to take photos. Geographers, cartographers, and commercial mappers use aerial photography to see land features not visible through ground level photographs. The wider area viewing, consistent scales through the entire frame for accurate measurement are just two advantages. There are no disadvantages for aerial photographers. For an annual function, I called an aerial photographer from singaporeaerialphotography.com to take photos.