This paper surveys the state-of-the-art automatic object extraction techniques from aerial
imagery. It focuses on building extraction approaches, which present the majority of the work
in this area. After proposing well-defined criteria for their assessment, characteristic
approaches are selected and assessed, based on their models and strategies. The
assessment gives rise to a combined model and strategy covering the current knowledge in
the field. The model comprises: the derivation of characteristic properties from the function of …