Study On The Evaluation Of Saving And Intensive Use Of Regional Construction Land In Changchun City Based On GIS

Land is the material foundation of human survival and development. Urbanconstruction land is the human activity places where economy is relatively developed andpopulation is relatively concentrated. Economical Intensive land use is the prerequisite toensure national food security, economic security, maintaining social stability. It is thefundamental way to alleviate the disparities between supply and demand of constructionland in the period of country industrialization and urbanization developing rapidly, and itis the fundamental way to guide the healthy and sustainable development of urbanization.Therefore, economical Intensive land use is China’s basic national policy and strategic,which draws more and more attention by the government, academics and society. Withhuman progressing, the speeding up of the mass exchange, and improve the quality of ourlife, how to save the effective use of construction land problems become the focus of thesocial buzz. Can the construction land be used efficiently will directly affect the humaneconomic development, population growth and environmental protection. Due to thescarcity of land, we cannot put eyes on “open source”, so, how to do the “throttling”,maximizing the ability of construction land use is very important.Land plays a fundamental role in the survival of humanity and societal development.Various activities take place in constructional land in urban areas where the economy iscomparatively advanced, and the population is relatively concentrated. Effective andsufficient land use is the premise for national food and economy security, as well as socialstability; it is able to ease the acute conflicts caused by national industrialization andurbanization; the efficiency of land use decides whether the nationwide urbanization issustainable and healthy; the government, academia, and society pay close attention to howto successfully maximize the use of land resource. In order to answer this question, it is important to consider not only broadening the land source, but also economizing theusage.Aimed to provide the local government with policies and standards regarding landuse, the characteristics of urban constructional land use have been examined and theevaluation results have been digitalized into a database using ArcGIS system. Thisresearch project has focused on the evaluation of construction land use in Changchun, thekey location for “Changjitu strategy”, with comprehensive investigation, integration, andassessment.Various methods and resources have been utilized to identify the major issues ofconstructional land use in Changchun urban area and to discover possible solutions. Theresearch project has thoroughly examined the concept of sufficient land use and exploredthe land use both nationally and internationally. In addition to existed conservation modelssupervised by tge Ministry of Land and Resources, a variety of indices has beeninvestigated with important perspectives such as economic development, populationgrowth, and environmental benefits. The qualitative analysis on the elastic relationshipsamong various constructional land uses are systematically categorized in terms of thepurpose and trend. An evaluation system and ArcGIS data base have been built based onthe quantitative analysis of all the collected indicators, the calculated index weight usingDelphi Method, and the estimated index value using EViews software.The research has shown the results below:（1）Urban land-use strategy ought to be updated and modified, graduallytransforming the original expansion mode to a three-dimensional and compact developingapproach. Firstly, during the development of suburban areas, land-use efficiency needs tobe heavily emphasized and the new construction sites need to be closely monitored; thefunctions and features of different areas are highlighted in order to create a harmoniousliving environment. Second, the transformation and modification of town centers need tobe accelerated with the implement of a vertical growth pattern. Moreover, thedevelopment of underground space needs to be emphasized and stimulated; hence groundland resources will be saved. （2）Currently, the land use in Changchun urban areas need to be improved, mainlydue to the high ratio of industrial and residential land and low coverage of transportationland and green space. It is important to focus on strengthening and optimizing the internalreconstruction of existed construction parcels.（3）The improvement on the efficiency of land use in Changchun is dependent onindustrial transformations and the output of land use. Look at the similarities among thedeveloped regions, two major leaps are evident: from a regional manufacturing center tonational manufacturing center, then to a high-tech and service-oriented global center. Theindustrial upgrade and transformation in Changchun are in progress; however, comparedto the developed regions, the reconstruction and transformation need to be furtherchallenged and motivated.The regional research on the land-use efficiency is arduous yet challenging. Amajority of research mainly focuses on cities and development zones; the regionalcomprehensive study on land-use efficiency is in its infancy stage. The integration ofenvironmental indices and the evaluation of land-use efficiency is original, innovative, andcreative. The possible issues of each area within the region can be intuitively identified bythe valuation of land-use efficiency.