共查询到19条相似文献，搜索用时 171 毫秒
1.
基于AHP和群体决策的土地定级因素权重的确定 总被引：2，自引：0，他引：2
土地定级因素的权重是土地定级因素对土地评价结果影响大小的量度,其精度的高低在一定程度上决定着土地级别划分的精度.为减少层次分析法的主观程度,在层次分析法计算因素权重的基础上,研究了如何运用群体决策方法来确定其综合权重.首先,在单一专家的情况下,运用层次分析法依次求出基本因素权重,接着利用CR求出群体决策中3位专家所获得的相对权重,对每一因素的权重进行线性加权,得出基本因素的最终权重,最后,采用同样的方法求得层次结构中每一层各定级因素的最终权重. 相似文献
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体现主客观信息的土地定级因素综合集成赋权法研究 总被引：5，自引：0，他引：5
应用云模型、特尔斐法、关联分析法研究了土地定级中各影响因素的合理赋权问题，提出了体现主客观信息的土地定级因素综合集成赋权方法，并依据武汉市土地定级指标体系和有关数据，对武汉市土地定级影响因素进行了权重挖掘。 相似文献
3.
关联度分析法在确定土地定级因素权重中的应用 总被引：5，自引：0，他引：5
从关联度分析法的基本原理入手，介绍了应用关联度分析法确定土地定级因素权重的具体方法，探讨了关联度分析法运用于土地定级因素权重确定的可行性。 相似文献
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选取威海市环翠区为评价区域,结合土地适宜性评价的相关方法和理论,应用地理信息系统(GIS)技术、层次分析法(AHP)和多因子综合权重叠加分析法确定每个指标的权重及作用分值,划分评价单元并计算评价总分值,根据评价总分值对该区域进行土地适宜性分等定级。最终绘制出环翠区土地适宜性分级地图,为城市建设选址、城市规划等提供科学的指导。 相似文献
5.
基于GIS(geographic information system)技术,提出了一种新的土地影响因子单元级别划分方法——路径距离分析法,该方法综合考虑了地形起伏和河流等"障碍",增加了"桥头堡"效应,提高了影响因子单元定级的合理性,同时免去了传统方法中的修正体系,极大提高了土地定级的效率.并以陕西省延安市某县城区土地定级为例,利用特尔斐法确定影响因子和各因子的权重,利用ArcGIS的路径距离分析法划分影响因子的单元级别,通过多因素综合法叠加得出土地定级图.实验表明,路径距离分析法的土地定级更加合理,可用于城镇基准地价评估. 相似文献
6.
基于GIS的城镇土地定级信息系统建模方法探讨 总被引：2，自引：0，他引：2
基于GIS的城镇土地定级信息系统在建设过程中,定级方法确定、定级单元大小确定和定级因素/子权重值的生成是关键,且三者都具有不同的确定方法,因此选择什么样的方法决定了系统建立的优劣。本文着重归纳、总结了城镇土地定级信息系统定级方法,通过对比分析,探讨了最优定级方法、最优网格单元大小划分方法和最优因素/子权重值计算方法。 相似文献
7.
城区土地定级研究是进行城区地价评估的基础.运用特尔菲法选取定级因素、因子并确定权重;借助GIS强大的空间数据和属性数据管理、分析功能,计算影响因素、因子的分值和定级单元的分值,并进一步对土地级别进行了划分;通过GIS的制图功能对定级结果以图形化的方式输出. 相似文献
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为正确量化农用地定级中区位因素作用分值,提高定级结果精度,采用定量与定性分析相结合法、实例验证法,基于图论中的最短路径理论?运用ArcView软件,应用最短路径算法计算区位因素到定级单元的水平距离,同时考虑定级区域地形起伏对水平距离的影响,采用高差修正方法对水平距离进行修正。研究结果表明,运用此方法求得的区位因素到定级单元的距离更符合实际距离,从而正确量化了区位因素作用分值,提高了定级结果精度。研究结果可为全面掌握和科学量化农用地质量,促进其合理利用提供科学依据。 相似文献
10.
一、前言 城镇土地定级是对城镇土地质量的评定。土地级别划分既要反映土地在经济效益上的差异，也要反映土地在经济、社会、生态等方面综合效益的差异。城镇土地定级采用多因素综合分析评定法。即选取对城镇土地质量有较大影响的自然、经济、社会等因素进行分析，最终划定土地等级。定级因素的选择，是土地定级的关键。因素选择多， 相似文献
11.
Manish Kumar Vasim Riyasat Shaikh 《Journal of the Indian Society of Remote Sensing》2013,41(2):417-424
Identification of suitable site for urban development in hilly areas is one of the critical issues of planning. Site suitability analysis has become inevitable for delineating appropriate site for various developmental initiatives, especially in the undulating terrain of the hills. The study illustrates the use of geographic information system (GIS) and multicriteria evaluation (MCE) technique for selection of suitable sites for urban development in Mussoorie municipal area, Dehradun district, Uttarakhand. For this purpose Toposheet and IKONOS satellite data were used to generate various thematic layers using ArcGIS software. Criteria using five parameters, i.e. slope, road proximity, land use/land cover, land values and geological formation were used for site suitability analysis following land evaluation. The generated thematic maps of these criteria were standardized using pairwise comparison matrix known as analytical hierarchy process (AHP). A weight for each criterion was generated by comparing them with each other according to their importance. With the help of these weights and criteria, final site suitability map was prepared. 相似文献
12.
针对传统土地评价不精准的问题,本文在传统的土地评价基础上,运用层次分析法,提出了一种基于多要素综合评价的模型构建方法,重点研究了主、客观评价因子以及相关权重确定原则,通过构建土地多要素综合评价模型,并以桂林市会仙镇为例,实现了基于多要素权重的土地评价。 相似文献
13.
将GIS技术引入洪涝灾害风险评估，可以弥补传统方法评估结果空间化显示不足的缺点。本文针对浙江省洪涝灾害的发生特点，从危险性和易损性两方面选择了浙江省洪涝灾害的影响因素，包括降雨量、地形、河网密度、人口密度和耕地百分比等因子。运用GIS空间分析技术对各因子进行空间化，结合层次分析法（AHP）确定各影响因素的权重，进行浙江省洪涝灾害风险评估和制图，并基于SuperMap iObjects平台设计与开发了浙江省洪涝灾害风险评估系统。研究结果表明：浙江省发生洪涝灾害的风险普遍偏高，高风险区域位于浙北和浙东南的沿海地带，较高风险区域位于浙东、浙南和浙北地区及金衢盆地中间地区，中等风险区位于浙南的西面、浙北及浙西地区。本文分析结果可为浙江省洪涝灾害预防和管理提供决策依据。 相似文献
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Satish Kumar Pankaj Kumar Srivastava Snehmani 《Journal of the Indian Society of Remote Sensing》2018,46(1):109-119
The main objective of this study was to mapping the potential avalanche susceptible zones in Siachen region of the Western Indian Himalaya. A geospatial analytical hierarchy process (AHP) model based on expert judgements has been applied in this study. Five most important terrain based avalanche occurrence parameters including slope, aspect, curvature, elevation and ground cover are employed in the present model. The ASTER GDEM and Landsat 8 OLI imagery are used to generate the avalanche occurrence parameters. A pairwise comparison matrix is computed to estimate the weight values for input terrain parameters. These weight values are then assigned to each respective avalanche occurrence parameter and employed in a geospatial AHP model to generate an avalanche susceptibility map. Finally, an avalanche inventory has been utilized to validate the results. The avalanche susceptibility map has been compared with the avalanche inventory map by calculating the area under the receiver operating characteristics curve (ROC-AUC) technique. 相似文献
15.
《International Journal of Digital Earth》2013,6(8):688-708
In this paper, GIS-based ordered weighted averaging (OWA) is applied to landslide susceptibility mapping (LSM) for the Urmia Lake Basin in northwest Iran. Nine landslide causal factors were used, whereby the respective parameters were extracted from an associated spatial database. These factors were evaluated, and then the respective factor weight and class weight were assigned to each of the associated factors using analytic hierarchy process (AHP). A landslide susceptibility map was produced based on OWA multicriteria decision analysis. In order to validate the result, the outcome of the OWA method was qualitatively evaluated based on an existing inventory of known landslides. Correspondingly, an uncertainty analysis was carried out using the Dempster–Shafer theory. Based on the results, very strong support was determined for the high susceptibility category of the landslide susceptibility map, while strong support was received for the areas with moderate susceptibility. In this paper, we discuss in which respect these results are useful for an improved understanding of the effectiveness of OWA in LSM, and how the landslide prediction map can be used for spatial planning tasks and for the mitigation of future hazards in the study area. 相似文献
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Using fuzzy analytical hierarchy process (AHP) technique, we propose a method for mineral prospectivity mapping (MPM) which is commonly used for exploration of mineral deposits. The fuzzy AHP is a popular technique which has been applied for multi-criteria decision-making (MCDM) problems. In this paper we used fuzzy AHP and geospatial information system (GIS) to generate prospectivity model for Iron Oxide Copper-Gold (IOCG) mineralization on the basis of its conceptual model and geo-evidence layers derived from geological, geochemical, and geophysical data in Taherabad area, eastern Iran. The FuzzyAHP was used to determine the weights belonging to each criterion. Three geoscientists knowledge on exploration of IOCG-type mineralization have been applied to assign weights to evidence layers in fuzzy AHP MPM approach. After assigning normalized weights to all evidential layers, fuzzy operator was applied to integrate weighted evidence layers. Finally for evaluating the ability of the applied approach to delineate reliable target areas, locations of known mineral deposits in the study area were used. The results demonstrate the acceptable outcomes for IOCG exploration. 相似文献
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The study aims at delineating groundwater potential zones using geospatial technology and analytical hierarchy process (AHP) techniques in mining impacted hard rock terrain of Ramgarh and part of Hazaribagh districts, Jharkhand, India. Relevant thematic layers were prepared and assigned weight based on Saaty’s 9-point scale and normalized by eigenvector technique of AHP to identify groundwater prospect in the study area. The weighted linear combination method was applied to prepare the groundwater potential index in geographic information system. Final groundwater prospects were classified as excellent, very good, good, moderate, poor and very poor groundwater potential zones. Study thus revealed that the excellent, very good and good groundwater potential zones, respectively, cover 148.3, 373.66 and 438.86 km2 of the study area, whereas the poor groundwater potential zone covers 180.05 km2. Validation was done through a receiver operating characteristic curve, which indicated that AHP had good prediction accuracy (AUC = 75.45%). 相似文献
18.
考虑到居民地的行政等级、位置特征、面积大小等因素对居民地选取的影响,提出了基于层析分析法的面状居民地自动选取方法。首先对影响居民地重要性的因素标准化;然后采用层次分析法对这些因素构建单个居民地层次结构模型,使这些因素加以关联;在此基础上,计算各因素的权值,并综合评价地图上单个居民地要素的重要性程度;最终利用开方根模型完成居民地的选取。该方法将定性分析和定量分析相结合,综合考虑不同因素对居民地重要性影响程度的差别,使权值分配更科学。试验证明,该方法选取的结果符合选取原则,较好地解决了居民地选取问题。 相似文献