1. A system for facilitating determination of positions of mobile devices such as unmanned aerial vehicles within an operating space containing a number of objects and markers placed on exposed surfaces of the objects, with each of the markers including a pattern of linear bars adjacent a data area, comprising: a mobile device operable to move about the operating space in response to control signals; and a controller on the mobile device generating the control signals based on a determination of a position of the mobile device within the operating space relative to locations of the markers, wherein the controller executes a localization module to locate each of the markers, to extract data from the data areas, and to estimate the position of the mobile device based on the extracted data, wherein the pattern of linear bars comprises first and second pairs of spaced apart and parallel bars with the first and second pairs being disposed on opposite sides of the data area, and wherein each of the linear bars in the first and second pairs of parallel bars has a length greater than a maximum length of the data area such that each of the linear bars extends at each end a distance beyond the data area.