The Research On Parcels

With the development of the society, people's demand of the land is increasing continuously, while the land is one kind of the rare and unrenewable producer's materials and assets, whose natural supply is stationary without elasticity and elasticity of economical supply is also small. Taking up a lot of land without abstinence for long time would make the resource exhausted and its environment destructive, which would circumscribe people's personal benefits and have effects on the social development of the human, so the execution of the scientific land management is become more and more important.In the work of land management, all the professional spatial object of professional volumes is a piece of land, stable in location and definite in boundary, case in points are plots in land using investigation, parcels in land selling, land parcel in land registration, homogeneous tract in land evaluation and so on, which we call parcels. In order to do well in land management, we must get to know parcels comprehensively. According to the inaccurate and incomprehensive knowledge about parcels encountering in practical land work, every kinds of geographical units are analyzed as the first step, and the definition, characteristics and structures of the parcels and their patterns are researched on more thoroughly. The different dividing methods of parcels' patterns and confirmation methods of their boundaries are concluded. On the basis of the characteristics of continuity, gradualness, transition and fluctuation of the geographical environmental situations, the problem of the uncertainty existing in the parcels is analyzed and researched with the combination with the existing limits of the technology. With the development of CIS in the societies' each aspect, it receives people's attention step by step. During the course of constructing CIS, spatial unit based on parcel become accepted gradually in common. Therefore, based on the conception of the parcel, the structure system of parcels' information and the information demand towards parcels are researched profoundly. Moreover, the construction situations of CIS based on parcels home and abroad are introduced briefly.