Virtual white lines for delimiting planned excavation sites

摘要

Methods and apparatus for facilitating detection of a presence or an absence of at least one underground facility within a dig area. A digital image that does not include an aerial image of a geographic area including the dig area is displayed on a display device. Via a user input device associated with the display device, at least one indicator is added to the displayed digital image to provide at least one indication of the dig area and thereby generate a marked-up digital image. Information relating to the marked up digital image is electronically transmitted and/or electronically stored so as to facilitate the detection of the presence or the absence of the at least one underground facility within the dig area.