Thai Nguyen city is being industrialized and modernized with significantly high speed of urbanization. This development has attracted more and more immigrations, which consequently led to an indispensable difficulty in the city's both construction and expansion. Its urban managing methods, meanwhile, are primary based on blueprints. 20 images make it virtually impossible to acquire an insight into managed areas, exact accommodation buildings' height, and void spaces as well as uneven plots... GIS 20 technology enables the visual display of city's architectural landscape, supports the administration in accord of height and supplements the current 20 drawings of site plan. Thanks to this 3D model, researchers will have a much closer look at not only the real world but also all drawbacks in the city's current architectural landscape, hence up come up with proper directions for space planning and city's improvement in the future.