1. A method of determining surface topology and associated color of at least a portion of a three-dimensional structure, the method comprising: within a time interval selected to ensure that a spatial disposition of an image gathering member of an apparatus is substantially fixed with respect to the structure portion, using the apparatus to generate depth data of the structure portion corresponding to a two-dimensional reference array substantially orthogonal to a depth direction, using the apparatus to generate two-dimensional first image data of the portion associated with the reference array, and using the apparatus to generate two-dimensional second image data of the portion associated with the reference array, the second image data being different from the first image data; generating two-dimensional estimated image data based on the first image data and the second image data so as to account for when the first image data and the second image data were generated relative to when the depth data was generated so that the estimated image data corresponds to when the depth data was generated; and mapping the estimated image data to the depth data for the reference array.