A ReconstructedLandmarkSet contains information about
features located on ReconstructedOutlines. Each
ReconstructedLandmarkSet contains a list of matrices, each of
which has columns labelled phi (latitude) and
lambda (longitude) describing the spherical coordinates
of points on the ReconstructedOutline.
David Sterratt
retistruct::FeatureSetCommon -> retistruct::ReconstructedFeatureSet -> ReconstructedLandmarkSet