We examine some issues related to the development and use of 3D models for ecological assessment of urban territories. It is established that its validity requires an integrated approach providing a means of analyzing the spatial interrelationships of natural and anthropogenic factors. As an appropriate tool, we propose to use 3D video scenes of the urban environment representing three-dimensional spatial models of real objects. The conditions are specified for obtaining digital terrain models that satisfy the requirements imposed on the subsequent development of 3D video scenes reflecting the ecological status of a territory, and the technique of their generation is described. A list of data is compiled on the state of the environmental components which serve as the basis for obtaining an integral characteristic of the ecological situation by using 3D video scenes. Emphasis is placed on the measurement capabilities of video scenes; therefore, experimental investigations were made into the accuracy of constructing them by using digital photogrammetric systems and GIS featuring the capabilities of work with 3D video scenes. The experimental investigations were made by using production material of aerial photography. Results from testing the technique on the territory of the city of Novosibirsk are presented. A morphometric analysis of topography of the city and its surroundings is made. Some territorial regularities of the pollutants distribution are ascertained, and the possible zones of drift, transit and accumulation are identified. The conclusions are drawn regarding the scope of the ecological and nature-conservation problems solved by mans of 3D video scenes.Keywords: three-dimensional modeling, digital elevation models, Earth remote sensing data, cartographic modeling.