1. A navigational aid for the visually impaired, comprising a location sensor configured to receiving the current geographic location of the navigational aid including altitude from a global navigation satellite system; an inertial measurement unit; a computer processor; a database containing map data; a non-volatile memory; and a user interface, wherein the map data comprises geographic location information pertaining to a region in which the navigational aid will be used, wherein the map data further comprises information on a structure of one or more objects within the region, wherein the information on a structure includes data defining at least one outer boundary of the one or more object within the region, wherein the location sensor and the inertial measurement unit are used to compute a location and an orientation of the navigational aid in three-dimensional space, and wherein the navigational aid uses the location and orientation, along with the map data, to provide navigational instructions and angle-dependent directives to a user to locate objects along a travel path without the use of a distance determination device.