Information technology has now become an important part of spatial data management for sustainable geopsasial information planning and development. This research aims to develop webgis routing ...applications using open source GIS technology capable of providing dynamic routing systems, completing effective routing, and displaying route search results. The system is built with Client-Server architecture design consisting of QGIS as GIS software, OSM as open spatial data provider, HTML, CSS, Javascript as basic programming language, Leaflet, Boostrap, and JQuery as mapping library, XAMPP as Server, PostgreSQL/PostGIS as spatial database management system, Dijkstra as route engine library and PHP as REST API for Web Development Backend. The results showed that the routing WebGIS application was able to run well in finding routes based on the Point of Interest (POI) entered and be able to display the results of alternative routes when there were road closures. Based on the results of the study, the conclusion is the use of open source technology is able to produce a dynamic routing, can be modified, easy in maintenance, and many library options for web mapping.
تغییرات اقلیمی در سالهای اخیر به‌دلیل افزایش هرچه بیشتر گازهای گلخانهای بیشتر از گذشته مشهود است. بنابراین، پیش‌بینی بلندمدت متغیرهای اقلیمی جهت اطلاع از میزان تغییرات آن‌ها و در نظر گرفتن تمهیدات ...لازم بهمنظور تعدیل اثرات سوء ناشی از تغییرات اقلیمی بیش از قبل مورد توجه است. راهکار پیش‌بینی تغییرات اقلیمی در مقیاس محلی استفاده از مدل‌های ریز مقیاس نمایی است. مدلهایی چون SDSM و Lars-WG مثالهایی از این ریز مقیاس نماها میباشند که در این مطالعه به آن پرداخته شده است. از آنجا که تغییر اقلیم شرایط کشت گیاه کلزا (Brassica napus L.) که یکی از گیاهان راهبردی و ارزشمند در ایران است را نیز دستخوش تغییر خواهد کرد، بنابراین انجام پژوهشی جهت مدیریت هرچه بهتر تولید این محصول در شرایط تغییر اقلیم، ضروری به نظر میرسد. در این تحقیق، با استفاده از مدل‌های پیش‌بینی دما و بارش و بهرهگیری از ابزارهایی چون سامانه اطلاعات جغرافیایی (GIS) و فرایند تجزیه و تحلیل سلسله مراتبی (AHP)به پهنهبندی زراعی گیاه کلزا بر اساس شرایط پیش‌بینی شده برای سال 2050 میلادی در استان مازندران پرداخته شده است. در این تحقیق از دادههای 37 ایستگاه هواشناسی و سینوپتیک استفاده شد و به تولید دادههای اقلیمی (دماهای اصلی و بارش) در سه سناریوی RCP (2.6, 4.5, 8.5) پرداخته شد. مقایسه مدل‌های پیش‌بینی تغییر اقلیم نشان داد که مدل SDSM در پیش‌بینی دماهای اصلی موفقتر بوده است، امّا برای پیش‌بینی میزان بارش مدلLars-WG عملکرد بهتری داشت. خروجی نقشه تناسب اراضی نشان داد که تغییر متغیرهای اقلیمی در آینده موجب تغییر در تناسب اراضی زراعی خواهد شد. همچنین با اجرای سناریوی تغییر اقلیم، پراکندگی مکانی و مساحت طبقات مختلف کمی دچار تغییر شد، بهگونهای که با اجرای سناریوی RCP 2.6 مساحت اراضی طبقه خیلی مناسب افزایش یافته و گسترش آن بهسمت مرکز استان بوده است. در سناریوهای RCP 8.5 و RCP 4.5 اراضی با طبقه تناسب خیلی مناسب وجود نخواهد داشت و بهسمت طبقات با تناسب ضعیف سوق داده خواهند شد. بهطور کلی، در سناریوی خوشبینانه تناسب اراضی برای کشت کلزا شرایط بهتر و پهنه وسیعتری خواهد یافت و در سناریوهای دیگر شرایط برای کشت کلزا در اراضی مازندران نسبت به زمان حال ضعیفتر خواهد شد و این کاهش کیفیت در اراضی غربی و جنوبی استان مشهودتر است. بنابراین، راهکارهایی چون استفاده از ارقام سازگارتر و تغییر در مدیریت زراعی در رویارویی با شرایط جدید در این مناطق باید مورد توجه قرار گیرد.
The study aimed to spatially examine the viability and site suitability of ecotourism in the Uttara Kannada district, India. Karnataka is a fantastic destination for a variety of travel and has a lot ...of potentials to promote ecotourism, which has acquired popularity in recent years. Ecotourism is important to the conservation and safeguarding of biodiversity. Consequently, the current research aims to find potential ecotourism areas in the Uttara Kannada district, utilizing the analytic hierarchy process (AHP) and Geographical Information System-Remote sensing (GIS-RS) methodologies. The study is based on the application of GIS-RS factors for landscape naturalness, climatic features, accessibility parameters, topographic attributes, protected and reserved regions, and natural attractiveness in the GIS platform via a weighted overlay method. To analyze and appraise the ecotourism potential in the study area, the research uses satellite and weighted overlays of auxiliary data from AHP. As an outcome, 53.54 % of the highly suitable land was found over the forest regions and finally, the Unsuitable regions were mainly indicated over the miscellaneous area (47.46 %). The majority of the most suitable ecotourism sites that fall under category S1 are located in the Taluks like Joida (27 %) and Karwar (15 %). The outcome of this paper as expected is that very high and moderately suitable regions were initiated in the forest region. The study's findings and methodology will be useful to decision-makers and planners.
Comparing the distribution of school districts in Shizuoka Prefecture with a Voronoi diagram generated for school locations, the application of Voronoi diagrams to the field of urban planning is ...pursued. The original statistics have been released by the government in the form of GIS data. Data processing and analysis are carried out utilizing open-source libraries.
Historical exploration of flash flood events and producing flash-flood susceptibility maps are crucial steps for decision makers in disaster management. In this article, classification and regression ...tree (CART) methodology and its ensemble models of random forest (RF), boosted regression trees (BRT) and extreme gradient boosting (XGBoost) were implemented to create a flash-flood susceptibility map of the Bâsca Chiojdului River Basin, one of the areas in Romania that is constantly exposed to flash floods. The torrential areas including 962 flash flood events were delineated from orthophotomaps and field observations. Furthermore, a set of conditioning forces to explain the flash floods was constructed which included aspect, land use and land cover (LULC), hydrological soil groups lithology, slope, topographic wetness index (TWI), topographic position index (TPI), profile curvature, convergence index and stream power index (SPI). All models indicated the slope as the most important factor triggering the flash flood occurrence. The highest area under the curve (AUC) was achieved by the RF model (AUC = 0.956), followed by the BRT model (AUC = 0.899), XGBoost model (AUC = 0.892) and CART model (AUC = 0.868), respectively. The results showed that the central part of the Bâsca Chiojdului river basin, which covers approximately 30% of the study area, is more susceptible to flash flooding.
Flood damage assessment is considered the essential tool for evaluating risk to civil and agricultural systems in land use planning. The validity of the studies’ outcome depends on the availability ...of data and their spatial distribution. The present study came to compute flood susceptibility maps utilizing two application models: (i) the frequency ratio, and (ii) the analytical hierarchy process. These models were then tested in the Khazir River basin using GIS with a selection of twelve flood conditioning factors. The flood inventory variables layer and flood-causing factors were created using remote sensing data, a digital elevation model, and secondary data from various sources. Then, the flood inventory map was highlight divided into training and test data, with 105 flood sites (70%) used for training and 45 sites (30%) used for testing. After applying the areas under the curve for the frequency ratio and analytical hierarchy process models, which were 90.6% and 88.9%, respectively, the final flood sensitivity maps showed similar results for the two models, which confirm the effectiveness of the adopted methodology. The study found a considerable spatial variance in flood sensitivity maps, as (21.06%) of the flooded areas are classified as having very low sensitivity to flooding, (24.09%) are classified as having low vulnerability to floods, and (23.79%) are classified as having moderate vulnerability, (24.10%) classified as highly vulnerable to flooding, and (6.96%) classified as highly vulnerable to flooding. Flood danger ranged from very low in mountain locations to very high in plain areas close to the riverbanks. Obtained results could be improved if a land-use planning policy will be applied, in order to establish a master plan for water resources development to avoid flood damage.
Os impactos socioeconômicos e ambientais são derivados do crescente e acelerado processo de desenvolvimento urbano. Uma das técnicas adotada por municípios é o zoneamento ambiental para ...reconhecimento e delimitação de unidades ambientais conforme suas características físicas e fragilidades. Este trabalho tem como objetivo realizar um levantamento bibliométrico como proposta para entender as aplicações do zoneamento ambiental sob o contexto urbano dos últimos dez anos. Os procedimentos metodológicos se basearam nas ferramentas de busca avançada das bases de indexação Scopus e Web of Science (WoS). Após organizar as informações foram realizados dois tipos de análises, uma quantitativa e outra qualitativa. A análise quantitativa teve como suporte as planilhas desenvolvidas, tendo como produto final tabelas e gráficos. Já a análise qualitativa fundamentou-se na manipulação do software VOSviewer para elaborar os mapas de rede mediante as palavras-chave dos autores mais frequentes das publicações analisadas. O maior número de publicações encontrados foi de 1.361, os quais foram retornados pela base WoS. O Brasil apareceu na terceira posição em ambas as plataformas, apesar disso ao analisar os artigos retornados pela WoS foi visto que o trabalho com maior número de citações é de autoria brasileira.
Panti asuhan adalah tempat untuk anak yatim piatu, anak yatim, serta anak-anak dari keluarga kurang mampu dan lainnya dapat menetap. Oleh sebab itu, panti asuhan juga banyak dilakukan oleh aktivitas ...sosial. Dinas Sosial Kota Padang menyatakan pada tahun 2018 terdapat 25 panti asuhan yang telah terdaftar. Untuk melaksanakan aktivitas sosial di panti asuhan, biasanya masyarakat langsung mendatangi panti asuhan yang dituju. Untuk melakukan aktivitas social nya terkadang perlu datang berkali-kali ke panti asuhan untuk kepastian dan pengurusan administrasi kegiatan sosial yang akan dilaksanakan. Dengan penerapan sistem informasi sebagai penyediaan informasi yang dapat digunakan melalui perangkat webGIS (Web Geographic Information System) maka semua permasalahan tersebut dapat diatasi. Pada penelitian ini dikembangkan pemetaan berbasi webGIS untuk Panti Asuhan Kota Padang yang dilengkapi dengan pendaftaran aktivitas sosial. Penelitian ini mengadopsi model pengembangan perangkat lunak Waterfall. Aplikasi ini telah diimplementasikan menggunakan bahasa pemrograman PHP dan Javascript. Hasil pengujian yang dilakukan oleh 5 orang pengguna menunjukkan bahwa sistem yang dibangun telah sesuai rancangan fungsional yang direncanakan.
This study deals that morphometric evaluation is feasible method of characterization of hydrological response behavior of the any river basin. In this study, Son basin a tributary of the Ganga river ...has been selected for the detailed morphometric evaluation. The Son basin is approximate 68,863km2 and shows sub-dendritic to dendritic drainage pattern. The measurement and analysis for Son basin and its five major sub-watershed are carried on GIS platform to describe the topography and drainage characteristics. The input parameters required to run this model are: a pour point, a minimum upstream area in sqkm and a digital elevation model. Streams were automatically extracted from ASTER DEM data. The stream order of the basin is predominantly controlled by physiographic and structural conditions. The study area is designated as sixth-order basin and lower order streams mostly dominate the basin with the drainage density value of 0.26km/km2. The slope of basin varied from 0° to 70.4° and the slope variation is mainly controlled by the local geology and erosion cycles. The bifurcation ratio (Rb) for the Son basin varies from 2.41 to 7. The higher values of Rb in basin indicate a strong structural and geological control on the drainage pattern. The elongation ratio of the basin is 0.553 indicating that the study area is extended with moderate to steep slopes. The increase in stream length ratio from lower to higher order shows that the basin is part of a mature geomorphic stage.
Renewable energy development and more specifically Wind Farm (WF) installation has been increased during the last years by most countries. A discipline that has been studied thoroughly is the impact ...of wind turbines on installation locations, during energy production or at the end of their life. Citizens’ attitudes, social and environmental factors are among the criteria affecting the selection of WFs installation locations. Various machine learning tools have been used in order to analyze the allocation of the Renewable Energy Systems (RES). In this paper a methodology based on computational geometry and Geographical Information Systems (GIS) is proposed in order to cluster the locations of Wind Turbines (WT) and define the boundaries of the areas that are affected by them. Delaunay Triangulation is selected as the main algorithm, since it is appropriate for handling geospatial data and it uses a geometric approach. Furthermore, algorithms based on graph theory are proposed in order to improve the efficiency of the methodology. The proposed methodology was implemented in locations of WTs in Greece and was compared to other known clustering algorithms. It was found that the locations of WTs in Greece are separated into 158 clusters. Some characteristics of the areas defined by the clusters, such as the distance from the protected areas, the distance from the closest airport and the number of residential areas that are within them, were computed and it was shown that these areas can be separated into 4 groups. The application aims to help policy makers to improve the effectiveness of their decisions by understanding in a better way which areas are more impaired or beneficial by the installation of WFs.
•This study deals with the Wind Farm installation problem for an entire country.•Wind Farm locations in Greece are clustered into 158 clusters.•The areas that are more beneficial or impaired by wind turbines are determined.•The mean number of residential areas per cluster is equal to 6.•79 out of 158 clusters do not contain any residential area.
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