GIS-based Spatial Allocation Of Land Use And Development Intensity Control Of TOD Staion Area

During the urbanization process,due to superior traffic conditions and high land value,the areas surrounding rail transit stations have rapidly become key areas for urban land development.However,previous methods on the urban land planning tended to ignore the impact of rail transits on land development.Recently,TOD(Transit Oriented Development)mode aims to conduct compact land development around rail transit stations.Therefore,TOD mode can not only rationally utilize limited land resources,but also support rail transit operations,so as to promote the coordinated development of both urban land planning and rail transit.The main problems in the land planning around TOD stations are the spatial allocation of land use type and land development intensity control.They involve the processing and analysis of massive and complex multi-dimensional spatio-temporal data.Nevertheless,traditional methods on the urban planning have limited quantitative analysis ability for multi-source data.GIS(Geographic Information System)has the powerful capability for the processing and analysis of spatial data.Therefore,spatial analysis technology in GIS is introduced to build a TOD guided quantitative model for spatial allocation of land use and the land development intensity control.This work firstly carries out a comprehensive review of related researches on TOD at home and abroad.Based on the review,a spatial analysis-based framework for the spatial allocation of land use and the land development intensity control around TOD stations is proposed.Specially,the planning scale of TOD areas is special,and the planning methods vary according to the land use characteristics of rail transit stations.Therefore,we pre-plan the areas surrounding the TOD stations,to determine station types and planning areas.Then,we adopt the spatial calculation in GIS to carry out quantitative analysis and evaluation of land development suitability.And based on the land use suitability,we use the GIS spatial statistical analysis to assist the spatial allocation of land use types and plot ratios.Finally,the rationality evaluation of the land planning results is carried out to verify the reliability of the model and assist the adjustment of the planning scheme.The spatial allocation of land use is based on evaluating the suitability of land use types.Then,in combination with the priority of land use configuration,a specified number of land use types are allocated reasonably according to the suitability of land use types.Land suitability evaluation can determine the suitability for a specific type of land use,and provide the main basis for the spatial allocation of land use types in the TOD station areas.Then,combined with the land use allocation sequence and the land quantity structure,a land use allocation method for the TOD station areas is determined to reasonably allocate the land use types to all the plots.Development intensity control aims to reasonably allocate the regional plot ratio benchmark to each plot.The suitability of plot ratios based on the GIS spatial analysis can quantitatively evaluate the suitability of the plot development intensity.Then,by constructing a quantitative model between the plot ratio,the regional plot ratio benchmark,and the suitability of the plot ratio,the plot ratio is reasonably allocated in space to achieve the purpose of optimizing the land development intensity.In order to optimize the land use arrangement and development intensity of the TOD station area,the rationality evaluation of their results is carried out from the overall land use characteristics,land use conditions and overall benefit evaluation,so as to assist the optimization and adjustment of the planning and design scheme.Finally,we take the vicinity of Luxiao Station in Chengdu as an example.By using the above-mentioned framework,the land use types and plot ratios in the Luxiao TOD station area are allocated,and the quantitative rationality of the planning results is evaluated.Finally,reasonable results in line with the TOD principles are obtained.Thus,it is confirmed that the research idea and quantitative model using the GIS spatial analysis are reliable and effective for the land spatial layout and land development intensity around stations under the TOD mode.