Homeowners’Associations(HOAs)dictate landscape structure and management through legally enforceable land covenants at the neighborhood scale in the USA.Determining the location and spatial extent of HOAs is critical ...Homeowners’Associations(HOAs)dictate landscape structure and management through legally enforceable land covenants at the neighborhood scale in the USA.Determining the location and spatial extent of HOAs is critical for examining its influence.However,such analysis is confounded by the lack of spatial data at the appropriate unit for such analysis.The purpose of this paper is to develop and realize an open source implementation to automate land parcel classification,which is an initial step towards the goal of determining the impact of HOAs on urban land management.Using Maricopa County,Arizona as a testbed,we found that parcel merging processes reduce the number of subdivisions from 26,042 to 17,269,such that boundaries better align with neighborhood units to which rule sets like land covenants apply.Moreover,after an initial training period,this process was completed in just over 7 hours.This research is an important first step in enabling a number of analysis including determining the location and spatial extent of HOAs regionally and,eventually,nationally and determining proposed links between HOAs and land management outcomes.展开更多
This paper proposes a comprehensive and practical approach to implement a land administration act in Sri Lanka followed by setting up a Land Administration Commission (LAC), which is a separate entity to maintain a La...This paper proposes a comprehensive and practical approach to implement a land administration act in Sri Lanka followed by setting up a Land Administration Commission (LAC), which is a separate entity to maintain a Land Administration Database Management System in support of the land information collected and maintained by stakeholders who deal with matters related to land and its decision-making under e-governance concept. Also, It describes the operations of the four core functions: land tenure, land valuation, land use, and land development in land administration under a single sustainable national land policy, underpinned by spatial information under the e-Governance mechanism. Further, the paper identifies the stakeholders and their main responsibilities in each of the four core functions with the current issues in sharing information across stakeholders. Finally, the paper describes setting up a Land administration entity thereby empowering the LAC and introduces spatial information layers at different resolution levels in a centralized land administration spatial database to keep track of all land transactions carried out by each stakeholder. This approach will enable the top-level decision-making authority (the central level) to manage all land-related activities under one platform to contribute towards the sustainable land development of the country. It is proposed to implement this approach as a pilot activity in the district of Colombo and expand it in the entire country gradually with its output.展开更多
矢量元胞自动机模型(VCA)能精细地模拟城市土地利用变化,在VCA中引入合理的地块分裂规则更符合城市扩张高度破碎化的特点。由于地块破碎及其模拟实现的复杂性,目前已有研究尚未考虑地块的动态分裂。该文提出了一种对地块分裂进行约束的...矢量元胞自动机模型(VCA)能精细地模拟城市土地利用变化,在VCA中引入合理的地块分裂规则更符合城市扩张高度破碎化的特点。由于地块破碎及其模拟实现的复杂性,目前已有研究尚未考虑地块的动态分裂。该文提出了一种对地块分裂进行约束的矢量元胞自动机模型(Constrained Dynamic Land Parcel Subdivision and Vectorbased Cellular Automata,CDLPS-VCA),通过形状、坡度、邻域来约束动态地块分裂过程,采用逻辑回归模型挖掘转换规则,并耦合矢量元胞自动机进行城市扩张模拟。该模型被应用于深圳市宝安区2009-2014年的城市扩张模拟,结果表明:与VCA和DLPS-VCA相比,CDLPS-VCA能获得最高的模拟精度(FoM=0.266,分别提高了0.046和0.020)和最相似的空间格局(al=86.08%,分别提高了11.30%和3.11%),说明在VCA中有机融合合理的地块分裂过程,能更精确地模拟土地利用变化;同时,基于模拟结果识别出了宝安中心组团、西部工业组团、西部高新组团3个城市发展热点区域。该方法能准确地模拟城市化进程,为城市土地利用监测和城市发展规划提供依据。展开更多
为提高农村土地经营管理信息化、土地集约利用,依据北京郊区土地经营现状和承包管理特点,利用Oracle数据库、ArcGIS Engine、ArcSDE和3S等相关技术手段构建了北京郊区农业土地承包信息管理系统;开展了多源异构数据融合、分布式虚拟访问...为提高农村土地经营管理信息化、土地集约利用,依据北京郊区土地经营现状和承包管理特点,利用Oracle数据库、ArcGIS Engine、ArcSDE和3S等相关技术手段构建了北京郊区农业土地承包信息管理系统;开展了多源异构数据融合、分布式虚拟访问、PDA现场绘制承包地块与属性编辑、成果上报与数据更新等关键技术研究,实现了定性分析、定量计算和直观展示相结合的空间一体化管理,同时利用郊区承包经营地块基础信息采集机PDA(Personal Digital Assistant)进行野外经营地块基础数据的快速采集与更新。该系统可以实现查询与统计、农业土地流转管理、农业灾害评估与农业保险、农产品安全保障等方面的空间辅助决策业务管理,促进了农业土地经营管理由传统粗放型向精细化、科学化的综合管理决策模式转变,为各级政府农村管理部门决策提供数据依据和分析工具,对首都基层三农发展具有重要的意义。展开更多
文摘Homeowners’Associations(HOAs)dictate landscape structure and management through legally enforceable land covenants at the neighborhood scale in the USA.Determining the location and spatial extent of HOAs is critical for examining its influence.However,such analysis is confounded by the lack of spatial data at the appropriate unit for such analysis.The purpose of this paper is to develop and realize an open source implementation to automate land parcel classification,which is an initial step towards the goal of determining the impact of HOAs on urban land management.Using Maricopa County,Arizona as a testbed,we found that parcel merging processes reduce the number of subdivisions from 26,042 to 17,269,such that boundaries better align with neighborhood units to which rule sets like land covenants apply.Moreover,after an initial training period,this process was completed in just over 7 hours.This research is an important first step in enabling a number of analysis including determining the location and spatial extent of HOAs regionally and,eventually,nationally and determining proposed links between HOAs and land management outcomes.
文摘This paper proposes a comprehensive and practical approach to implement a land administration act in Sri Lanka followed by setting up a Land Administration Commission (LAC), which is a separate entity to maintain a Land Administration Database Management System in support of the land information collected and maintained by stakeholders who deal with matters related to land and its decision-making under e-governance concept. Also, It describes the operations of the four core functions: land tenure, land valuation, land use, and land development in land administration under a single sustainable national land policy, underpinned by spatial information under the e-Governance mechanism. Further, the paper identifies the stakeholders and their main responsibilities in each of the four core functions with the current issues in sharing information across stakeholders. Finally, the paper describes setting up a Land administration entity thereby empowering the LAC and introduces spatial information layers at different resolution levels in a centralized land administration spatial database to keep track of all land transactions carried out by each stakeholder. This approach will enable the top-level decision-making authority (the central level) to manage all land-related activities under one platform to contribute towards the sustainable land development of the country. It is proposed to implement this approach as a pilot activity in the district of Colombo and expand it in the entire country gradually with its output.
文摘矢量元胞自动机模型(VCA)能精细地模拟城市土地利用变化,在VCA中引入合理的地块分裂规则更符合城市扩张高度破碎化的特点。由于地块破碎及其模拟实现的复杂性,目前已有研究尚未考虑地块的动态分裂。该文提出了一种对地块分裂进行约束的矢量元胞自动机模型(Constrained Dynamic Land Parcel Subdivision and Vectorbased Cellular Automata,CDLPS-VCA),通过形状、坡度、邻域来约束动态地块分裂过程,采用逻辑回归模型挖掘转换规则,并耦合矢量元胞自动机进行城市扩张模拟。该模型被应用于深圳市宝安区2009-2014年的城市扩张模拟,结果表明:与VCA和DLPS-VCA相比,CDLPS-VCA能获得最高的模拟精度(FoM=0.266,分别提高了0.046和0.020)和最相似的空间格局(al=86.08%,分别提高了11.30%和3.11%),说明在VCA中有机融合合理的地块分裂过程,能更精确地模拟土地利用变化;同时,基于模拟结果识别出了宝安中心组团、西部工业组团、西部高新组团3个城市发展热点区域。该方法能准确地模拟城市化进程,为城市土地利用监测和城市发展规划提供依据。
文摘为提高农村土地经营管理信息化、土地集约利用,依据北京郊区土地经营现状和承包管理特点,利用Oracle数据库、ArcGIS Engine、ArcSDE和3S等相关技术手段构建了北京郊区农业土地承包信息管理系统;开展了多源异构数据融合、分布式虚拟访问、PDA现场绘制承包地块与属性编辑、成果上报与数据更新等关键技术研究,实现了定性分析、定量计算和直观展示相结合的空间一体化管理,同时利用郊区承包经营地块基础信息采集机PDA(Personal Digital Assistant)进行野外经营地块基础数据的快速采集与更新。该系统可以实现查询与统计、农业土地流转管理、农业灾害评估与农业保险、农产品安全保障等方面的空间辅助决策业务管理,促进了农业土地经营管理由传统粗放型向精细化、科学化的综合管理决策模式转变,为各级政府农村管理部门决策提供数据依据和分析工具,对首都基层三农发展具有重要的意义。
