Key points are not available for this paper at this time.
High-resolution remote sensing images are the most important information sources for the 3D digital city. The general remote sensing techniques by satellite and aircraft can get the geographic information of large area, but there are some limitations in detail information acquisition. In the paper, we design an implement a new remote sensing means by UAV( Unmanned Air Vehicle). UAV is a new platform of Remote Sensing which is navigated by the telecontrol device. The system we developed named UAV-II, which has integrated the RS and UAV technology. The system comprises of RS device, RS platform and tele-controlling system. RS device is used to acquire photos, and we installed three CCD digital cameras on UAV-II in order to get wide-angle images. The platform is the carrier of RS device which is made mainly of glass fibre reinforced plastic. The tele-controlling system is used to control the flying state and all devices working normally. From tests of UAV images acquired from various shooting conditions, we draw the conclusion that 45° and 300 meter are the ideal shooting angle and height to get the most abundant information. After the images acquisition, we can extract geometry and texture information from UAV images by photogrammetry. Different from the traditional photogrammetry which needs stereo-mate, we developed a monoscopic photogrammetry method which only need a single photo. Using all the information we acquired from UAV images, we can reconstruct 3D models of the city.
Wang et al. (Wed,) studied this question.