地籍宗地时空数据库中的变化检测

研究目的：针对地籍时空数据库中不同时期的宗地数据无法判断其变化类型的问题,探索研究一种能够准确检测出不同时期宗地发生的变化信息并进一步进行数据挖掘的方法。研究方法：对地籍时空数据库中的宗地数据采用增量信息提取算法提取出不同时期宗地数据之间的增量信息,并通过模式识别分析出其各种变化类型;通过ArcGIS二次开发设计一个变化检测系统,自动完成其检测过程。研究结果：通过该变化检测系统检测出的两个时期之间的宗地变化信息准确无误。研究结论：通过ArcGIS二次开发地籍数据库变化检测系统,能够准确提取宗地数据的变化数据,通过分析宗地的变化信息并进一步进行数据挖掘,对地理国情监测与土地利用决策有着重要意义。     

模糊综合评估宗地地价

运用模湖集理论，提出在确定基准地价的基础上模糊综合评估宗地地价的方法，建立了模糊综合评估宗地地价的数学模型和指标体系，并通过评估实例阐述其运算的方法，使对宗地Ｘ地价的评估由定性描述为定量化。     

基于开源GIS的城市基准地价信息发布平台的设计与实现

采用开源的Geotools平台和jfreechart软件作为基础,基于Java Applet构建小型城市基准地价信息发布平台.平台的构架设计以定级估价数据库标准为基础,紧密结合城市基准地价信息发布工作流程和数据流程,并且采用Java的远程对象和相关的远程方法调用(RMI)作为权限控制设计的模式,实现了能够执行城市土地级别、基准地价、标定地价等空间信息在多用户条件下的图形显示控制、属性查询统计以及图属互查等复杂操作的基准地价信息发布功能,可以满足目前国内大多数中小城市的基准地价信息发布的需求.     

立体综合用地宗地价格评估方法研究

研究目的:研究具有多权属、多用途特性的立体综合用地地价评估方法。研究方法:文献评述法,数学模型法。研究结果:分析了影响立体综合用地价格的影响因素,设计了由综合基准地价、用途、地价空间分配决定的立体综合用地宗地价格评估方法。研究结论:立体综合用地宗地价格评估方法,可用于宗地地价评估,亦可应用于不同用途、不同权属、不同楼层的地价分摊。     

城镇商业用地基准地价的容积率修正系数编制新方法

研究目的：建立一种具有理论基础的城镇商业用地基准地价容积率修正系数编制方法,为宗地评估提供更科学的参数标准。研究方法：基于竞租理论和最大效用原则等理论综合分析房屋楼层用途分布的经济驱动和土地收益随楼层递增而递减的变化特征,确定了均质区域内存在楼层用途由商业向住宅转换的分布特征及以转换层为临界点的收益分段递减规律;据此设计了以商业与住宅用地级别叠加划分均质区域R、统计方法确定临界楼层k、住宅级别基准地价确定临界楼面地价P的参数确定方法,基于城市房屋重置价格和典型楼盘的楼层售价的剩余法确定k+1层—顶层之间地价比值作为商业楼层系数并计算商业楼层地价,继而结合商业首层楼面基准地价回归分析拟合第1—k层之间的商业楼层修正系数;以此统计不同容积率和建筑密度条件下的宗地地价与基准地价的比值作为修正系数值。研究结果：基于上述思路设计了针对城镇商业用地基准地价容积率修正系数的系统编制技术流程,以四会市城镇商业用地基准地价容积率修正系数编制进行了实例说明。研究结论：本方法在广东省汕头市潮阳区、四会市、饶平县等城镇基准地价评估中得到实践应用,验证了其可行性与合理性,丰富、完善了中国基准地价评估的技术流程。     

标定地价评估的标准宗地布设方法研究——以唐山市为例

文章通过标准宗地内涵和布设原则的确定,重点探索标准宗地布设的方法,主要运用均质地域原理,应用聚集度离散公式,结合商服、住宅与工业用地的物业类型,综合确定如何布设标准宗地,为建立标定地价体系、评估标定地价提供了坚实的基础,最后以唐山市为例,测算如何确定标准宗地布设的合理数量。     

宗地面积对住宅地价的影响

研究目的:研究宗地面积对住宅地价的影响,为土地估价提供科学的决策信息。研究方法:文献资料法、GWR模型、Hedonic模型、GIS方法。研究结果:(1)把结果与Hedonic模型进行了对比,证明GWR模型解释的可信;(2)在解释宗地面积的影响时,用GIS方法把GWR方法的结果生成曲面,进行可视的空间显示。研究结论:宗地面积对住宅地价的影响在空间上有很大差异。     

小城镇地价评估原理初探

小城镇地价评估原理初探刘水杏包纪祥一、我国小城镇地价评估工作存在的缺陷及根源与大中城市相似,目前小城镇地价评估的基本思路也是土地定级与估价结合进行,即先进行土地定级再在级内分用途确定基准地价,以基准地价为基础对各宗地进行具体情况修正得到宗地地价。这与...     

基于地价动态监测体系的基准地价更新研究--以南京市为例

在评述国内外基准地价更新研究的基础上,系统全面地分析了国内目前基准地价更新工作中存在的问题,提出通过监测点地价测算地价指数,以更新基准地价的新思路.以南京市为案例,利用原土地定级资料、基准地价资料、地价监测点体系信息和土地市场资料,结合国家城镇估价规程,通过测算监测点的地价求取地价指数,进行基准地价更新,取得了良好的效果.     

假设开发法有关参数的确定和计算

假设开发法有关参数的确定和计算李安一、前言地价评估中，常常会用到假设开发法，尤其是在为商品房开发评估地价的场合。所谓假设开发法，就是对待评土地进行估价时，根据城市总体规划和宗地详规的要求，在遵循土地最佳用途等原则下，假设待评宗地房地产开发后，按照评估...     

A constructability assessment method (CAM) for sustainable division of land parcels

Historically the land development process has lacked a decision support structure for evaluating undeveloped parcels of land for compatibility with land use policy and engineering constraints. This paper demonstrates an applied multi-criteria decision support structure for characterizing the spatial distribution and classification of a parcel’s potential to support residential lot construction. This support structure is based on parcel attributes quantified in a typical site feasibility report, to include: potential house yield, wetlands area, soil types, streams (surface drains), and steep slope areas. The analytical capabilities of geographic information system (GIS) are employed in the decision support structure named the constructability assessment method (CAM). CAM integrates a dynamic multi-criteria attribute assessment method, based on the Analytical Hierarchy Process (AHP), for a given set of administrative requirements, and engineering constraints and judgment.The results of a case study using CAM characterized the approximate location of ideal lots for homes construction in an R-1 zoning district located on a 1290 acre land parcel in Loudoun County, VA, while avoiding existing hydric soils, floodplains, steep slopes, and forested areas. The number of ideal lots for a given set of engineering and administrative constraints represented a 65% reduction from the maximum lots permitted by regulatory constraints alone. The methodology used in this case study provides a consistent and repeatable land parcel analysis technique for undeveloped land parcels, and can be adapted and/or extended to a number of similar publicly available geographic datasets and constraint. In estimating optimal development density, CAM meets the needs of zoning administrators as well as the developers, thus offering a demand-driven market-based solution for sustainable land development.     

农村集体土地产权调查中地块编号方法的实践与研究

在对目前土地产权调查和地籍测量中地块编号方法分析的基础上,结合农村土地产权调查中地块编号方法的实践应用,提出一套符合现代地籍管理需要,便于现代数字测绘和地籍数据库建设和地籍管理信息系统建立的地块编号的方法。该方法共计10个级别21位数字。用该方法表达层次清晰,涵盖了丰富的地块信息,其缺点是位数较长,不便于操作,亦未考虑宗地的时间因素,存在一定的局限性。     

A geometric and semantic evaluation of 3D data sourcing methods for land and property information

Urbanisation, the development of high-rise apartments and the advent of complex building structures creates unique challenges that cannot be met by 2D land and property information. These include inter-related titles and complex plans relating to (i) the land parcel and (ii) the building, both internal (indoor plans) and external attributes (roof and façade). Incorporating the third dimension into the land development cycle can potentially address such challenges by providing data that describes both the land parcel and building in 3D. This move towards 3D data administration requires the development of new 3D data processes, including 3D data sourcing, which forms the focus of this research. Following an examination of current 2D methods in land and property information registration, a framework of the requirements for sourcing 3D land and property information is suggested and potential methods are discussed. Focussing on the geometric and semantic components an evaluation of the methods is developed and applied. The results highlight methods based on photogrammetry, laser scanning, mobile mapping, Unmanned Aerial Systems (UAS) and Building Information Modelling (BIM) to source integrated 3D information for both the internal and external attributes of a building and corresponding land parcel.     

THE VALUE OF INFORMATION PROVIDED BY A UNIFORM GRADING SYSTEM

The potential effects of a uniform meat grading scheme on market performance are evaluated in terms of a change in the information state. A uniform grading system may reduce the per unit costs involved in the collection and transmission of information on the characteristics of, and the price differentials for, different units of the commodity set. Under conditions of uncertainty an improved information state will increase market participants' expected utility. A general procedure for an empirical evaluation of a grading scheme is outlined.     

基于ArcEngine的城镇土地定级估价信息系统设计与实现

研究目的:通过研发新的城镇土地定级估价系统,弥补现有土地定级、估价系统存在的不足,以期更好地为国土管理,城镇土地市场的正常、高效、科学运转提供保障。研究方法:组件式地理信息系统,Kriging插值技术,多次方差。研究结果:研发了基于Arc Engine的重庆市土地定级估价系统,该系统包含了土地定级和土地估价两个部分,增加了障碍因素分析模块,在系统研发的同时制定了定级估价数据库标准,提升了系统的通用性。研究结论:应用于重庆市进行实例验证,得到的结果基本符合重庆市的土地等级和基准地价的实际情况。     

Factors influencing land fractioning in the context of land market deregulation in Ecuador

Land fractioning is a continuous process that could lead to land abandonment. In this work, the relationship between the speed of land market dynamics and land fractioning were studied and compared in two rural parishes of Ecuador. For this study, a database with relevant information extracted from land property deeds was generated for both study areas. Additionally, 193 land buyers and sellers were surveyed to determine the factors influencing/motivating land transactions. We observed a gradual increment of land fractioning with the mean ‘fractionated parcel surface’ independent of the speed of land market dynamics. Instead, the purpose assigned to the land by the actors involved in the land market seems to be the factor influencing the mean fractionated parcel surface and average parcel surface the most. The similarities of the studied areas with others inside and outside Ecuador makes the study relevant in a wider context. Our results could aid local governments in improving their land administration strategies in a deregulated land market context.     

Prediction of the purchase cost of agricultural land: The example of Côte-d’Or,France

The goal of this study is to develop an estimation procedure for the purchase cost of agricultural lands that are not necessarily on the market. To do so, we implement the first stage of the hedonic price method to estimate the price of agricultural lands that have been the object of real estate transactions. We work at the original scale of the parcel. The estimation results are then employed to predict the price for agricultural lands that have not been the object of transactions. This stage needs the construction of explanatory variables at the level of entire parcels. To reduce the acquisition cost of information, we focus on the French administrative department of Côte-d’Or (8,763 km² and 983,116 cadastral parcels). We show that the predictor proposed by Meulenberg (1965) best suits our dataset.