DDIS specializes in capturing and analyzing aerial photography as a means to produce visual impact studies, viewshed surveys, and more. We use tethered balloons, telescopic masts, fixed-wings, and multi-rotor drones to capture photographic viewshed studies and time-lapse data. Our annotated overlays, cross-sections, 3D CAD data, and height-specific 360° views, are used for marketing, zoning, site planning, and architectural design. With 20+ years of professional experience and various aerial platform inventions, we are able to access highly restricted, urban airspace, when others commercial entities cannot. We have captured 360° panoramas for many of the tallest proposed buildings across the US.