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Current Internet-inspired mapping data are in the form of street maps, orthophotos, 3D models or street-side images and serve tosupport mostly search and navigation. Yet the only mapping data that currently can really be searched are the street maps via theiraddresses and coordinates. The orthophotos, 3D models and street-side images represent predominantly "eye candy" with little addedvalue to the Internet-user. We are interested in characterizing the elements of the urban space from imagery. In this paper we discussthe use of street side imagery and aerial imagery to develop descriptions of urban spaces, initially of building facades and roofs. Wepresent methods (a) to segment facades using high-overlap street side facade images, (b) to map facades and facade details fromvertical aerial images, and (c) to characterize roofs by their type and details, also from aerial photography. This paper describes amethod of roof segmentation with the goal of assigning each roof to a specific architectural style. Questions of the use of the atticspace, or the placement of solar panels, are of interest. It is of interest that roofs have recently been mapped using LiDAR pointclouds. We demonstrate that aerial images are a useful and economical alternative to LiDAR for the characterization of buildingroofs, and that they also contain very valuable information about facades

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

INTERPRETATION OF 2D AND 3D BUILDING DETAILS ON FACADES AND ROOFS