DDIS specializes in capturing and analyzing aerial photography as a means to produce visual impact studies, viewshed surveys.. 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 19 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. Our moored balloon is often flying above Washington, DC, and New York City. If you see an aerostat balloon over the city, it’s probably us.