Abstract: Systems, methods, apparatuses, and landing platforms are provided for visual and/or ground-based landing of unmanned aerial vehicles. The unmanned aerial vehicles may be capable of autonomously landing. Autonomous landings may be achieved by the unmanned air vehicles with the use of an imager and one or more optical markers on a landing platform. The optical markers may be rectilinear, monochromatic patterns that may be detected by a computing system on the unmanned aerial vehicle. Furthermore, the unmanned aerial vehicle may be able to automatically land by detecting one or more optical markers and calculating a relative location and/or orientation from the landing platform.