时空参考框架普适化表达

Along with the increasing expansion of GIS in diverse application fields, spatial information systems face a variety of challenges, such as full-scale, full-category and full dynamics. Pan-spatial information system is an effective way to deal with the challenges mentioned above, in which spatial-temporal reference framework (STRF) is the core for the quantitative representation for human's view of time and space. When handling objects of study with different scales and in different domains, the STRF in pan-spatial information system has various difficulties including descriptive scale, datum transformation, as well as integration of space and time. Thus, there is a huge demand for the development of a generic and unitary approach for the description and transformation of STRF. Through comparison and analysis on current STRFs in 1-, 2-, 3- or even higher dimensions, a new ubiquitous STRF is put forward in this study. In fact, the proposed ubiquitous representation of STRS in pan-space is applicable to the corresponding mathematical quantitative description and the related representation of semantic vagueness. Thus, it provides reference for spatial-temporal representation in a broad sense. Meanwhile, based on fractal dimension characteristics extensively available in the real world and the proposed ubiquitous representation method, a unitary representation of STRF is investigated by making use of recursive computation. A full-scale and full-dimensional transformation of STRF is then realized in the pan-space.