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1.
城镇地籍数据建库是第二次全国土地调查工作的核心部分,其数据的质量、完善性等直接影响数据库的运行效率。依据第二次土地调查城镇地籍数据建库标准,以汉寿县城镇地籍数据建库为例,从数据准备、数据入库以及成果提交等方面阐述了城镇地籍数据库建设工作,研究了建库过程中出现的关键技术问题,为同类建库工作提供了可借鉴参考。 相似文献
2.
3S技术在城镇土地调查与潜力评价中的应用 总被引：2，自引：0，他引：2
针对国土资源部《宁夏中卫市市区土地利用现状调查与潜力分析评价》试点项目,结合工作实际,通过开展城镇土地调查,建立城镇地籍数据库系统,对"3S"技术在城镇土地现状与潜力分析评价中的应用方法进行探讨。 相似文献
3.
吕宝奇 《测绘与空间地理信息》2017,(6):217-219
河南省地籍管理部门,在第一次土地调查、第二次土地调查、城镇地籍初始调查、城镇地籍更新调查、农村集体土地所有权调查、农村集体土地使用权调查等几次大的国字号地籍调查工作中,取得了丰富的地籍调查成果。但是,由于调查成果的时间、坐标基准、比例尺和技术方法存在差异,给统一的信息化地籍管理造成了障碍。对不同时间、不同比例尺、不同坐标系统的地籍数据成果进行统一和融合,是解决这一障碍的方法,同时,对于地籍管理的大数据应用意义重大。 相似文献
4.
曹爱民 《测绘与空间地理信息》2011,34(1):198-201
就国土资源部《宁夏中卫市市区土地利用现状调查与潜力分析评价》试点项目,结合工作实际,通过开展城镇土地调查,建立城镇地籍数据库系统,对城镇土地现状与潜力分析评价数据获取方法进行探讨。 相似文献
5.
Urbanization is increasingly becoming a widespread phenomenon at all scales of development around the globe. Be it developing or developed nations, all are witnessing urbanization at very high pace. In order to study its impacts, various methodologies and techniques are being implemented to measure growth of urban extents over spatial and temporal domains. But urbanization being a very dynamic phenomenon has been facing ambiguities regarding methods to study its dynamism. This paper aims at quantifying urban expansion in Delhi, the capital city of India. The process has been studied using urban land cover pattern derived from Landsat TM/ETM satellite data for two decades (1998–2011). These maps show that built-up increased by 417 ha in first time period (1998–2003) and 6,633 ha during next period (2003–2011) of study. For quantification of metrics for urban expansion, the Urban Landscape Analysis Tool (ULAT) was employed. Land cover mapping was done with accuracy of 92.67 %, 93.3 % and 96 % respectively for years 1998, 2003 and 2011. Three major land covers classes mapped are; (i) built-up, (ii) water and (iii) other or non-built-up. The maps were then utilized to extract degree of urbanization based on spatial density of built-up area consisting of seven classes, (i) Urban built-up, (ii) Suburban built-up,(iii) Rural built-up, (iv) Urbanized open land, (v) Captured open land, (vi) Rural open land and (vii) Water. These classes were demarcated based on the urbanness of cells. Similarly urban footprint maps were generated. The two time maps were compared to qualitatively and quantitatively capture the dynamics of urban expansion in the city. Along with urbanized area and urban footprint maps, the new development areas during the study time periods were also identified. The new development areas consisted of three major categories of developments, (i) infill, (ii) extension and (iii) leapfrog. 相似文献
6.
A. J. Florczyk M. Melchiorri J. Zeidler C. Corbane M. Schiavina S. Freire 《International Journal of Digital Earth》2020,13(1):45-60
ABSTRACTGeo-information on settlements from Earth Observation offers a base for objective and scalable monitoring of the evolution of cities and settlements, including their location, extent and other attributes. In this work, we deploy the best available global knowledge on the presence of human settlements and built-up structures derived from Earth Observation to advance the understanding of the human presence on Earth. We start from a concept of Generalised Settlement Area to identify the Earth surface within which any built-up structure is present. We further characterise the resulted map by using an agreement map among the state of the art of remote sensing products mapping built-up areas or other strictly related semantic abstractions as urban areas or artificial surfaces. The agreement map is formed by a grid of 1?km2, where each cell is classified according to the number of EO-derived products reporting any positive occurrence of the abstractions related to the presence of built-up structures. The paper describes the characteristics of the Generalised Settlement Area, the differences in the agreement map across geographic regions of the world, and outlines the implications for potential users of the EO-derived products used in this study. 相似文献
7.
传统的地籍信息管理通常是国土资源各部门各自为政,数据不能互联互通,信息无法共享。由于地籍信息具有保密性,因此,采用C/S模式构建网络城镇地籍变更系统,实现统一部署、信息共享,提高地籍管理科学化水平。本文以丹东市城镇地籍信息系统为研究对象,根据系统需求分析,系统基于C/S构架进行开发,并采用强大的ArcEngine控件和Visual C#2010集成技术设计开发了城镇地籍信息系统,最终实现了地籍变更、国有土地使用证、土地使用权变更档案以及查询辅助功能等,不仅提高了数据准的确性和及时性,同时,使系统更加信息化、网络化。 相似文献
8.
地籍调查是以权属调查为核心，查清每一宗土地的位置、权属界线、数量、用途等基本状况，满足土地登记需要。地籍调查是土地登记的前期工作和法定程序之一。地籍调查按调查对象分为城镇地籍调查和农村地籍调查。目前农村地籍调查是在土地利用现状调查过程中同步完成的。农村地籍调查的主要成果是权属界线协议书、集体（国有）土地权属调查表（以下简称“一书一表”）。本文针对“一书一表”自动生成，探讨一种数据采集组织方法，以供参考。 相似文献
9.
目前,城市土地集约利用系统方面的研究较少,且多采用C/S架构、数据人工录入以及固定指标体系的方式进行评价。本文采用数据动态提取技术,通过对城镇地籍数据库的监听,动态提取评价指标中的土地类数据;采用空间离散化技术,将社会经济类数据进行全域覆盖,形成动态的、全覆盖的集约评价数据库,并在此基础上,实现了宏观、中观、微观三种尺度的集约评价,开发成都市城市土地集约评价系统。 相似文献
10.
AbstractExtracting built-up areas from remote sensing data like Landsat 8 satellite is a challenge. We have investigated it by proposing a new index referred as built-up land features extraction index (BLFEI). The BLFEI index takes advantage of its simplicity and good separability between the four major component of urban system, namely built-up, barren, vegetation and water. The histogram overlap method and the spectral discrimination index (SDI) are used to study separability. BLFEI index uses the two bands of infrared shortwaves, the red and green bands of the visible spectrum. OLI imagery of Algiers, Algeria, was used to extract built-up areas through BLFEI and some new previously developed built-up indices used for comparison. The water areas are masked out leading to Otsu’s thresholding algorithm to automatically find the optimal value for extracting built-up land from waterless regions. BLFEI, the new index improved the separability by 25% and the accuracy by 5%. 相似文献
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12.
城镇地籍数据的有效分类与正确组织是地籍数据库规范建立和正常运行的前提条件。本文提出了基于地籍要素规则的分类方法,按照地籍数据的表达类型,描述了宗地背景图形数据、宗地图形数据、测量控制点数据、属性数据和档案数据的各个要素定义和编码规则。以成都市地籍数据库的建设为实例,根据各种来源的地籍数据分别开展了不同类型地籍数据的快速分类与入库工作。 相似文献
13.
Behnam Atazadeh Leila Halalkhor Mirkalaei Hamed Olfat Abbas Rajabifard Davood Shojaei 《地球空间信息科学学报》2021,24(3):387-402
Cadastral surveying plays an important role in defining legal boundaries of land and property. The current practice for recording cadastral survey data mainly relies on 2D digital or analog documents. This practice is efficient for simple land parcels but can be challenged in complex building developments. To address the issues stemmed from 2D methods of representing cadastral survey data, 3D spatial information models can be considered as a viable solution for managing cadastral survey data. Building Information Modeling (BIM) enables colsslaborative 3D management of the design, construction, and operation of buildings. There have been extensive studies conducted to investigate the connectivity between BIM and 3D cadaster. Most of these studies focus on managing legal information, such as ownership boundaries and attributes, in BIM-based environments. However, there is limited investigation on how survey- ing measurements can be mapped into BIM. In this study, the proposed method for integrating the cadastral survey data into the BIM environment includes identifying cadastral survey requirements, using BIM entities relevant to cadastral survey data, enrichment of a BIM proto- type, and evaluation of the prototype. The major contribution of this study is to demonstrate the storage of cadastral survey data such as survey marks and traverse lines in the BIM environment. Therefore, this research contributes to the further enrichment of BIM with incorporating data elements related to cadastral surveying practices. It is confirmed that current BIM-based tools provide restricted capabilities for explicit management and visualiza- tion of cadastral survey data. This limitation can be addressed in the future enhancements of BIM in terms of supporting important elements for cadastral survey data. 相似文献
14.
城市建成区边界是城市土地资源管理和城市扩张管理的重要依据。本文提出了基于出租车轨迹数据,利用多分辨率下规则格网对比分析法及Densi-Graph阈值确定法,来自动提取城市建成区边界的方法。试验采用北京市2008年出租车GPS轨迹点数据,依据该方法模型计算提取城市建成区并进行结果准确度评价,将提取结果与北京市2008年土地覆盖空间分布图进行比对,所提取建成区边界范围与城镇、建设用地区域范围基本相符;将提取结果与中国城市统计年鉴数据进行比对,该年鉴中给定2008年北京市建成区总面积为1 310.94 km^2,本文方法提取建成区总面积约为1 077.33 km^2,提取准确度约为82.18%,表明本文方法可以获得准确的建成区范围。 相似文献
15.
Amit Kumar Arvind Chandra Pandey Najmul Hoda A. T. Jeyaseelan 《Journal of the Indian Society of Remote Sensing》2011,39(2):213-224
The present study analyzes the built-up expansion of Ranchi urban agglomeration over a period of about 8 decades from 1927–2005.
Satellite images and topographical maps were used to evaluate land use dynamics during these periods. Built-up growth of 473.7%
during 1927–2005 was primarily at the expense of agricultural land along with reduction of natural water bodies reflects negative
impacts of built-up expansion, which increased many folds in recent decades. The built-up growth is also analyzed with reference
to population growth, land consumption rate and land transformation. The land loss due to increasing built-up growth of Ranchi
were compared with other capital regions and cities along with population increase to provide insight into the possible scenario
of built-up expansion in Ranchi urban area. 相似文献
16.
城镇地籍数据库质量的好坏,很大比例取决于建库数据的质量。本文以烟台市牟平区第二次城镇土地调查及信息系统建设项目为例,分析了城镇地籍数据库建设中数据采集、数据转换等过程中的误差来源,并且阐述了利用FME、Arcgis软件对图形中的拓扑关系进行处理及利用SQL_Server程序语言对数据库进行全面检查的具体方法,建立了相应的工作流程,有效地控制了数据库的质量。使用该工作流程可以在数据库检查工作中提高工作效率,为相关部门提供必要的参考。 相似文献
17.
Ron Mahabir Peggy Agouris Anthony Stefanidis Arie Croitoru Andrew T. Crooks 《International Journal of Digital Earth》2020,13(6):683-707
ABSTRACTThe worldwide slum population currently stands at over one billion, with substantial growth expected in the coming decades. Traditionally, slums have been mapped using information derived mainly from either physical indicators using remote sensing data, or socio-economic indicators using census data. Each data source on its own provides only a partial view of slums, an issue further compounded by data poverty in less-developed countries. To overcome such issues, this paper explores the fusion of traditional with emerging open data sources and data mining tools to identify additional indicators that can be used to detect and map the presence of slums, map their footprint, and map their evolution. Towards this goal, we develop an indicator database for slums using open sources of physical and socio-economic data that can be used to characterize slum settlements. Using this database, we then leverage data mining techniques to identify the most suitable combination of these indicators for mapping slums. Using three cities in Kenya as test cases, results show that the fusion of these data can improve the mapping accuracy of slums. These results suggest that the proposed approach can provide a viable solution to the emerging challenge of monitoring the growth of slums. 相似文献
18.
The surface fabric of urbanized areas, (i.e. its constituent land covers and land uses) plays an essential role in the generation of the urban/rural temperature differences, i.e. the Urban Heat Island (UHI) effect. Land surface information, derived from satellite imagery, and complementary information such as demographics can be used as the basis for an understanding of the atmospheric and surface thermal variations within cities. The results of comprehensive land surface characterizations of two major Canadian urban areas, the Greater Toronto Area and Ottawa-Gatineau, are described. Spatial information, including land cover fraction maps, land use and its historic changes, population density maps are compared with intra-urban surface temperature variations derived from satellite thermal imagery. Three aspects of the impacts of land cover and land use on urban land thermal characteristics are addressed, namely, (a) the relationships between surface temperature and subpixel land cover and population density (b) intra-city seasonal temperature variations and (c) the intensification of the urban heat island effect due to urban built-up land growth. 相似文献
19.
Feilin Lai 《地理信息系统科学与遥感》2020,57(6):830-844
ABSTRACT Information on urban settlements is crucial for sustainability planning and management. While remote sensing has been used to derive such information, its applicability can be compromised due to the complexity in the urban environment. In this study, we developed a remote sensing method to map land cover types in a large Latin-American city, which is well known for its mushrooming unplanned and informal settlements. After carefully considering the landscape complexity there, we designed a data fusion method combining multispectral imagery and non-spectral data for urban and land mapping. Specifically, we acquired a cloud-free Landsat-8 image and two non-spectral datasets, i.e., digital elevation models and road networks. Then, we implemented a set of experiments with different inputs to evaluate their merits in thematic mapping through a supervised protocol. We found that the map generated with the multispectral data alone had an overall accuracy of 73.3% but combining multispectral imagery and non-spectral data yielded a land cover map with 90.7% overall accuracy. Interestingly, the thermal infrared information helped substantially improve both the overall and categorical accuracies, particularly for the two urban classes. The two types of non-spectral data were critical in resolving several spectrally confused categories, thus considerably increasing the mapping accuracy. However, the panchromatic band with higher spatial resolution and its derived textural measurement only generated a marginal accuracy improvement. The novelties of our work are with the successful separation between the two major types of urban settlements in a complex environment using a carefully designed data fusion approach and the insight into the relative merits of the thermal infrared information and non-spectral data in helping resolve the issue of class ambiguity. These findings should be valuable in deriving accurate urban settlement information which can further advance the research on socio-ecological dynamics and urban sustainability. 相似文献
20.
Christina Corbane Pesaresi Martino Politis Panagiotis Florczyk J. Aneta Melchiorri Michele Freire Sergio 《International Journal of Digital Earth》2020,13(1):101-118
ABSTRACTThe presence of green spaces within city centres has been recognized as a valuable component of the city landscape. Vegetation provides a variety of benefits including energy saving, improved air quality, reduced noise pollution, decreased ambient temperature and psychological restoration. Evidence also shows that the amount of vegetation, known as ‘greenness’, in densely populated areas, can also be an indicator of the relative wealth of a neighbourhood. The ‘grey-green divide’, the contrast between built-up areas with a dominant grey colour and green spaces, is taken as a proxy indicator of sustainable management of cities and planning of urban growth. Consistent and continuous assessment of greenness in cities is therefore essential for monitoring progress towards the United Nations Sustainable Development Goal 11. The availability of multi-temporal greenness information from Landsat data archives together with data derived from the city centres database of the Global Human Settlement Layer (GHSL) initiative, offers a unique perspective to quantify and analyse changes in greenness across 10,323 urban centres all around the globe. In this research, we assess differences between greenness within and outside the built-up area for all the urban centres described by the city centres database of the GHSL. We also analyse changes in the amount of green space over time considering changes in the built-up areas in the periods 1990, 2000 and 2014. The results show an overall trend of increased greenness between 1990 and 2014 in most cities. The effect of greening is observed also for most of the 32 world megacities. We conclude that using simple yet effective approaches exploiting open and free global data it is possible to provide quantitative information on the greenness of cities and its changes over time. This information is of direct interest for urban planners and decision-makers to mitigate urban related environmental and social impacts. 相似文献