scholarly journals Spatial Paradigms in Road Networks and Their Delimitation of Urban Boundaries Based on KDE

2020 ◽  
Vol 9 (4) ◽  
pp. 204 ◽  
Author(s):  
Yuying Lin ◽  
Xisheng Hu ◽  
Mingshui Lin ◽  
Rongzu Qiu ◽  
Jinguo Lin ◽  
...  
Keyword(s):  
Spatial Data ◽  
Rural Areas ◽  
Urban Areas ◽  
Critical Role ◽  
Road Networks ◽  
Spatial Data Analysis ◽  
Easy Method ◽  
Study Region ◽  
Entire Study ◽  
Depth Analysis

An in-depth analysis of urban road network distribution plays a critical role in understanding the urbanization process. However, effective ways to quantitatively analyze the spatial paradigms of road networks are still lacking, and few studies have utilized road networks to rapidly identify urban areas of a region. Thus, using a fast-developing region in the south-eastern costal region of China, Fuzhou City, as a case, we introduced kernel density estimation (KDE) to characterize road networks and quantified the area’s spatial heterogeneity using exploratory spatial data analysis (ESDA) and semivariance analysis (SA). The results show that there is an uneven spatial distribution of the networks both at the regional and downtown levels. At the regional level, there is a conspicuous polarization in the road distribution, with the KDE being much higher in the urban areas than in the rural areas; at the downtown level, the KDE gradually decreases from the center to the periphery. Quantitatively, the ranges of the spatial dependence of the networks are approximately 25 km for the entire study region and 12 km for the downtown area. Additionally, the spatial variations vary among different directions, with greater variations in the northeast–southwest and the southeast–northwest directions compared with the other directions, which is in line with the urban sprawl policy of the study area. Both the qualitative and quantitative results show that the distribution of road networks has a clear urban–rural dual structure, which indicates that road networks can be an active tool in identifying the urban areas of a region. To this end, we propose a quick and easy method to delimit urban areas using KDE. The extraction results of KDE are better than those of the index-based built-up index (IBI), indicating the effectivity and feasibility of our proposed method to identify the urban areas in the region. This research sheds new light on urbanization development research.

scholarly journals Study on the Level and Type Identification of Rural Development in Wuhan City’s New Urban Districts

2020 ◽  
Vol 9 (3) ◽  
pp. 172 ◽  
Author(s):  
Liang Jiang ◽  
Jing Luo ◽  
Chunyan Zhang ◽  
Lingling Tian ◽  
Qingqing Liu ◽  
...  
Keyword(s):  
Rural Development ◽  
Spatial Data ◽  
Rural Areas ◽  
Urban Areas ◽  
Socioeconomic Development ◽  
Spatial Differentiation ◽  
Principal Component ◽  
Spatial Data Analysis ◽  
Balanced Development ◽  
Urban Districts

A quantitative analysis of rural development is required to comprehend the spatial differentiation of a rural area and promote rural sustainable development under the pressure of urbanization and industrialization, especially areas with dramatic changes in rural socioeconomic development of China and other developing countries. Taking Wuhan as the case study, this paper developed an index system including rural settlement, land, industry and human settlement environment for evaluating the level of rural development. Then, using the exploratory spatial data analysis, the principal component analysis and the cluster analysis, this paper analyzes the spatial differentiation and correlation and categorizes the types of rural development. The results are as follows. (1) The spatial differentiation of the level of rural development in Wuhan City’s new urban districts is obvious and the areas with a high level of rural development are mainly distributed at the intersection of the new and central urban areas and gradually decrease outward. (2) There is a significant spatial agglomeration of the developed rural areas and the structure of the spatial change in these areas resembles a certain continuity, specifically a circle of “central heat surrounding cold”. (3) Rural development in the new urban areas can be divided into the following five types: the ecological leisure type, the traditional farming type, the balanced development type, the industrial-and-agricultural mixed type and the industrial promotion type. The corresponding development path is proposed in combination with different types of rural development to provide a theoretical basis and decision-making reference for rural revitalization.

scholarly journals Estimation of Building Heights and DEM Accuracy Assessment Using ICESat-2 Data Products

2021 ◽  
Vol 10 (1) ◽  
pp. 37
Author(s):  
Goddu Pavan Sai Goud ◽  
Ashutosh Bhardwaj
Keyword(s):  
Spatial Data ◽  
Rural Areas ◽  
Urban Areas ◽  
Accuracy Assessment ◽  
Urban Expansion ◽  
Population Expansion ◽  
Cost Effective ◽  
Absolute Error ◽  
Google Earth ◽  
Surface Geometry

The use of remote sensing for urban monitoring is a very reliable and cost-effective method for studying urban expansion in horizontal and vertical dimensions. The advantage of multi-temporal spatial data and high data accuracy is useful in mapping urban vertical aspects like the compactness of urban areas, population expansion, and urban surface geometry. This study makes use of the ‘Ice, cloud, and land elevation satellite-2′ (ICESat-2) ATL 03 photon data for building height estimation using a sample of 30 buildings in three experimental sites. A comparison of computed heights with the heights of the respective buildings from google image and google earth pro was done to assess the accuracy and the result of 2.04 m RMSE was obtained. Another popularly used method by planners and policymakers to map the vertical dimension of urban terrain is the Digital Elevation Model (DEM). An assessment of the openly available DEM products—TanDEM-X and Cartosat-1 has been done over Urban and Rural areas. TanDEM-X is a German earth observation satellite that uses InSAR (Synthetic Aperture Radar Interferometry) technique to acquire DEM while Cartosat-1 is an optical stereo acquisition satellite launched by the Indian Space Research Organization (ISRO) that uses photogrammetric techniques for DEM acquisition. Both the DEMs have been compared with ICESat-2 (ATL-08) Elevation data as the reference and the accuracy has been evaluated using Mean error (ME), Mean absolute error (MAE) and Root mean square error (RMSE). In the case of Greater Hyderabad Municipal Corporation (GHMC), RMSE values 5.29 m and 7.48 m were noted for TanDEM-X 90 and CartoDEM V3 R1 respectively. While the second site of Bellampalli Mandal rural area observed 5.15 and 5.48 RMSE values for the same respectively. Therefore, it was concluded that TanDEM-X has better accuracy as compared to the CartoDEM V3 R1.

scholarly journals RURAL URBAN MIGRATION AND WOMEN IN URBAN SLUMS OF KARACHI

2017 ◽  
Vol 56 (2) ◽  
pp. 81-91
Author(s):  
Shagufta Nasreen ◽  
Asma Manzoor
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Development Planning ◽  
Urban Slums ◽  
Urban Migration ◽  
Depth Analysis ◽  
Distribution Of Resources ◽  
Rural Urban Migration ◽  
Urban And Rural Areas ◽  
Questionnaire Method

Poverty creates many problems. Out of which one major problem is an increase in migration rate. In Pakistan, the rate of inter province and rural urban migration has increased in the last few years resulting in an expansion in urban population. The objective of this study was to explore the experience of women who have migrated from rural to urban areas with their families and are living in urban slums. Moreover, the study aims to explore the reasons of migration from rural to urban areas, the change occurred in their living conditions and their level of satisfaction. Total 100 women from selected katchi abadis (urban slums) of Karachi and were in-depth interviewed through questionnaire method. To have an in depth analysis of the situation, both open and closed ended questions were included. Results show that most of these women have migrated with their families due to poverty. The need is to take decisions that promote equity and social justice. The distribution of resources and development planning need to focus on the need of urban and rural areas on equal bases because just moving towards metropolitan city does not change their living rather it is deteriorating the situation.

scholarly journals Land and Forest Management by Land Use/ Land Cover Analysis and Change Detection Using Remote Sensing and GIS

2016 ◽  
Vol 9 (1) ◽  
pp. 63-77 ◽  
Author(s):  
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Forest Management ◽  
Land Cover ◽  
Spatial Data ◽  
Management Strategies ◽  
Geographical Information ◽  
Spatial Data Analysis ◽  
Study Region ◽  
Rugged Terrain

Abstract Remote sensing and Geographical Information System (GIS) are the most effective tools in spatial data analysis. Natural resources like land, forest and water, these techniques have proved a valuable source of information generation as well as in the management and planning purposes. This study aims to suggest possible land and forest management strategies in Chakia tahsil based on land use and land cover analysis and the changing pattern observed during the last ten years. The population of Chakia tahsil is mainly rural in nature. The study has revealed that the northern part of the region, which offers for the settlement and all the agricultural practices constitutes nearly 23.48% and is a dead level plain, whereas the southern part, which constitute nearly 76.6% of the region is characterized by plateau and is covered with forest. The southern plateau rises abruptly from the northern alluvial plain with a number of escarpments. The contour line of 100 m mainly demarcates the boundary between plateau and plain. The plateau zone is deeply dissected and highly rugged terrain. The resultant topography comprises of a number of mesas and isolated hillocks showing elevation differences from 150 m to 385 m above mean sea level. Being rugged terrain in the southern part, nowadays human encroachment are taking place for more land for the cultivation. The changes were well observed in the land use and land cover in the study region. A large part of fallow land and open forest were converted into cultivated land.

scholarly journals Groundwater as a Source of Drinking Water in Southeast Asia and the Pacific: A Multi-Country Review of Current Reliance and Resource Concerns

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1605 ◽  
Author(s):  
Naomi Carrard ◽  
Tim Foster ◽  
Juliet Willetts
Keyword(s):  
Drinking Water ◽  
Low Income ◽  
Rural Areas ◽  
Urban Areas ◽  
Critical Role ◽  
Water Source ◽  
Groundwater Resource ◽  
Drinking Water Source ◽  
Water Services ◽  
Sustainable Services

Groundwater is widely acknowledged to be an important source of drinking water in low-income regions, and it, therefore, plays a critical role in the realization of the human right to water. However, the proportion of households using groundwater compared with other sources is rarely quantified, with national and global datasets more focused on facilities—rather than resources—used. This is a significant gap in knowledge, particularly in light of efforts to expand water services in line with the inclusive and integrated agenda of the Sustainable Development Goals. Understanding the prevalence of groundwater reliance for drinking is critical for those involved in water services planning and management, so they can better monitor and advocate for management of water resources that supports sustainable services for households. This paper contributes data that can be used to strengthen the integration of resource considerations within water service delivery and inform the work of development partners supporting this area. We approach this issue from two perspectives. Firstly, we collate data on the proportion of households using groundwater as their primary drinking water source for 10 Southeast Asian and Pacific nations, finding an average of 66% (range of 17–93% for individual countries) of households in urban areas and 60% (range of 22–95%) of households in rural areas rely on groundwater for drinking. Together, these constitute 79% of the total population across the case study countries. Secondly, we review current and emerging groundwater resource concerns within each country, using a systems thinking approach to assess how groundwater resource issues influence household water services. Findings support the case for governments and development agencies to strengthen engagement with groundwater resource management as foundational for achieving sustainable water services for all.

scholarly journals Urbanization and Increasing Flood Risk in the Northern Coast of Central Java—Indonesia: An Assessment towards Better Land Use Policy and Flood Management

Land ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 343
Author(s):  
Wiwandari Handayani ◽  
Uchendu Eugene Chigbu ◽  
Iwan Rudiarto ◽  
Intan Hapsari Surya Putri
Keyword(s):  
Land Use ◽  
River Basin ◽  
Spatial Data ◽  
Urban Areas ◽  
Landsat Imagery ◽  
Flood Management ◽  
Spatial Data Analysis ◽  
Northern Coast ◽  
Flood Events ◽  
Central Java

This study explores urbanization and flood events in the northern coast of Central Java with river basin as its unit of analysis. Two types of analysis were applied (i.e., spatial data and non-spatial data analysis) at four river basin areas in Central Java—Indonesia. The spatial analysis is focused on the assessment of LULC change in 2009–2018 based on Landsat Imagery. The non-spatial data (i.e., rural-urban classification and flood events) were overlaid with results of spatial data analyses. Our findings show that urbanization, as indicated by the growth rate of built-up areas, is very significant. Notable exposure to flood has taken place in the urban and potentially urban areas. The emerging discussion indicates that river basins possess dual spatial identity in the urban system (policy- and land-use-related). Proper land use planning and control is an essential instrument to safeguard urban areas (such as the case study area) and the entire island of Java in Indonesia. More attention should be put upon the river basin areas in designing eco-based approach to tackle the urban flood crises. In this case, the role of governance in flood management is crucial.

scholarly journals ESDA (Exploratory Spatial Data Analysis) of Vegetation Cover in Urban Areas—Recognition of Vulnerabilities for the Management of Resources in Urban Green Infrastructure

2020 ◽  
Vol 12 (5) ◽  
pp. 1933
Author(s):  
Ana Clara M. Moura ◽  
Bráulio M. Fonseca
Keyword(s):  
Data Analysis ◽  
Population Density ◽  
Spatial Data ◽  
Green Infrastructure ◽  
Vegetation Cover ◽  
Urban Areas ◽  
Spatial Behavior ◽  
Spatial Data Analysis ◽  
Exploratory Spatial Data Analysis ◽  
Local Index

From the mapping of urban vegetation cover by high-resolution orthoimages, using IR band and NDVI classification (Normalized Difference Vegetation Index), added to three-dimensional representation obtained by LiDAR capture (Light Detection and Ranging), the volumetric values of vegetal cover are obtained as a base to construct spatial analysis in the district of Pampulha, in Belo Horizonte, investigating the role it plays in the neighborhood. The article aims to analyze the relationship between vegetation cover, income distribution and population density, as a support to urban environmental quality management. It applies Exploratory Spatial Data Analysis (ESDA) to identify the presence of clusters and patterns of spatial distribution and to examine spatial autocorrelation. The results confirm the concentration of vegetation cover in areas of high income and lower population density but the main contribution of the study is the use of a method to analyze the spatial behavior of this distribution. Calculating Moran global index and local index (LISA), these spatial combinations are mainly used to identify transformation pressures, which may result in the definition of priorities for public actions and the construction of proposals for parameterization of vegetation cover to support plans related to green infrastructure in urban areas.

scholarly journals Analisis Distribusi Serangga Tanah Jalan MT Haryono dan Tlogomas Malang

Biota ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. 139-150
Author(s):  
Hasan Zayadi ◽  
Nurul Jadid Mubarakati
Keyword(s):  
Spatial Data ◽  
Urban Areas ◽  
Spatial Data Analysis ◽  
Shade Trees ◽  
Ecosystem Research ◽  
H Index ◽  
Attribute Data ◽  
Paratrechina Longicornis ◽  
Soil Insects ◽  
Number Of Individuals

Vegetation in urban areas can be viewed, as compensation for environmental change due to urbanization of plant diversity affecting the diversity of animals in an ecosystem, the loss of plant species will disrupt the food webs in the ecosystem. Research on the diversity of soil insects found in shade trees species is still not widely done. The purpose of this study were to identify the types of soil insects found in shade trees along Dinoyo and Tlogomas roadside in sub-district of Lowokwaru, Malang and to characterize spatial distribution of soil insect species found in shade trees along Dinoyo and Tlogomas roadside in sub-district of Lowokwaru Malang by using GIS application. Sampling was conducted at two different locations (MT Haryono and Tlogomas Road). Soil insect analysis was calculated using Shannon-Wiener (H') index at different sites. Variables measured were Relative Frequency (FR) and Relative Abundance (KR), while mapping Spatial descriptions. Distribution of soil insects was done by stages in spatial data analysis including digitization, attribute data, map overlay, and map output results. The results of this study obtained the number of species of soil insects as many as 14 species with a total of 287 individuals. Soil insects most commonly found were family Formicidae, the species of Momorium destructor with the number of individuals as much as 87 individuals, and Paratrechina longicornis as many as 86 individuals.

scholarly journals Measurement and Path Selection of Rural Development Level in Enclave Areas: A Case Study of Jingyuan County, Gansu Province

2021 ◽  
Vol 13 (17) ◽  
pp. 9904
Author(s):  
Jianwu Qi ◽  
Wei Li ◽  
Zongxiang Wang ◽  
Haozhou Fang
Keyword(s):  
Sustainable Development ◽  
Rural Development ◽  
Spatial Data ◽  
Rural Areas ◽  
Path Selection ◽  
Gansu Province ◽  
Spatial Data Analysis ◽  
Development Level ◽  
Resource Endowment ◽  
Urban And Rural Areas

The development of rural areas is a significant component in social and economic activities. It is very important for optimizing the allocation of rural production and living factors, promoting the integration of urban and rural areas and sustainable development to identify the characteristics and main types of regional rural development. In this paper, 169 villages in Jingyuan County were selected as the research object, and the evaluation index system of rural development level was constructed from the perspective of “Factor-structure-function”. The rural development level and spatial structure characteristics of Jingyuan County were analyzed by using rural development index, regional function index, nearest neighbor index, and exploratory spatial data analysis, and the types and specific paths of rural development were determined. The results showed the following: Rural development of Jingyuan County is at a low level, which is characterized by “high in the south and low in the north”. The level of rural development shows significant spatial dependence in the global space, and the spatial agglomeration characteristics are obvious, which are manifested as strong agglomeration dominated by resource endowment and cultural function and weak agglomeration dominated by production function and location relationship. The local space is characterized by stable high value and high value (H-H), low value and low value (L-L) bidirectional agglomeration. According to the spatial characteristics of the rural development level, the “4 + 10 + 6 + 2” system of rural development type identification in Jingyuan County was constructed, and finally it was determined that policy leading and characteristic protection are the dominant types of rural development. Based on this, this paper put forward specific paths and development models of different types of rural development in Jingyuan County from seven dimensions: industry, population, land, tourism, space, culture and ecology, so as to provide ideas and references for the integration of urban and rural areas, the implementation of rural revitalization strategy, and sustainable development in the western poverty-stricken areas.

Spatiotemporal spread of chikungunya virus in Sarawak, Malaysia

2021 ◽  
Author(s):  
Sarat Dass ◽  
Romano Ngui ◽  
Balvinder Singh Gill ◽  
Yoke Fun Chan ◽  
Wan Yusoff Wan Sulaiman ◽  
...  
Keyword(s):  
Spatial Data ◽  
Rural Areas ◽  
Urban Areas ◽  
Chikungunya Virus ◽  
Reproduction Number ◽  
Control Measures ◽  
River Networks ◽  
Scan Statistic ◽  
R Software ◽  
Time Scan

Abstract Background We studied the spatiotemporal spread of a chikungunya virus (CHIKV) outbreak in Sarawak state, Malaysia, during 2009–2010. Methods The residential addresses of 3054 notified CHIKV cases in 2009–2010 were georeferenced onto a base map of Sarawak with spatial data of rivers and roads using R software. The spatiotemporal spread was determined and clusters were detected using the space-time scan statistic with SaTScan. Results Overall CHIKV incidence was 127 per 100 000 population (range, 0–1125 within districts). The average speed of spread was 70.1 km/wk, with a peak of 228 cases/wk and the basic reproduction number (R0) was 3.1. The highest age-specific incidence rate was 228 per 100 000 in adults aged 50–54 y. Significantly more cases (79.4%) lived in rural areas compared with the general population (46.2%, p<0.0001). Five CHIKV clusters were detected. Likely spread was mostly by road, but a fifth of rural cases were spread by river travel. Conclusions CHIKV initially spread quickly in rural areas mainly via roads, with lesser involvement of urban areas. Delayed spread occurred via river networks to more isolated areas in the rural interior. Understanding the patterns and timings of arboviral outbreak spread may allow targeted vector control measures at key transport hubs or in large transport vehicles.

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