Abstract: In view of the existing limitations (high field work intensity,low measurement accuracy,and low mapping efficiency) in current measurement of housing construction areas,this paper proposed a more advanced method based on UAV tilt photogrammetry for measuring housing construction areas.Meanwhile,we use this approach to study UAV tilt photogrammetry,real scene 3D modelling,digital orthophoto production,3D digital mapping,map production,calculation of area index,and so on,then the accuracies of test results are assessed.The results show that the errors of topographic map in the plane position,height,the point position of housing corner,the building side length,and the building area are 4.6 cm,4.2 cm,4.6 cm,4.5 cm,and the area difference of the house building is less than the area limit of the secondary precision of the urban commercial house,respectively,these measurement accuracies are up to the national standard.Therefore,we conclude that this method is feasible for housing areas measurements.

Key words: UAV;tilt photogrammetry;real scene 3D modelling;3D digital mapping;measurement of housing construction area;accuracy evaluation