عنوان مقاله [English]
نویسنده [English]چکیده [English]
Over the past decade the need for elevation information in the city has risen enormously. This includes controlling vertical deviations of buildings, recording the 3D status of service facilities such as water supply networks, sewage network and electricity transmission lines, as well as creating precise urban 3D models for urban planning purposes. The question dealt with in this paper is how to expand the scattered 3D data by adopting an economical and cost-effective method. The author of this paper presents his examinations based on the experiences gained in Stockholm.