Web-based GIS Platform Research Articles

DEVELOPMENT OF A WEBGIS FOR SOLAR PV RESOURCE AND INSTALLATION ASSESSMENT USING GEOSPATIAL TECHNOLOGIES

Abstract. The SINAG Web Portal, a web-based GIS platform that hosts spatial data and a forecasting model for solar PV installation assessment, serves as a repository for the products and outputs of the SolarPot and OutSolar components of a research project called Solar PV Resource and Installation Assessment Using Geospatial Technologies (SINAG). The website was developed with frontend and backend services which involved the use of a content management system, database systems, cloud virtual machines, Linux operating systems, programming languages, specifically Python and JavaScript, and a style scripting framework. All outputs generated by the two components of Project SINAG are stored on the dedicated cloud server of the website. It includes processed spatial data, a graphical summary of the created models, the ability to explore historical data, data requests and downloads, and the use of mapping tools. It is anticipated that the web portal will play a significant role in the assessment and decision-making process for selecting candidate sites for installing solar PV systems across the Philippine archipelago.

ANALISIS PRODUKTIVITAS KEBUN KOPI 2016 – 2019 DENGAN METODE SPASIAL TEMPORAL (STUDI KASUS: SELURUH INDONESIA)

In 2019 Indonesia was ranked 4th (fourth) after Brazil, Vietnam, and Colombia as the world's largest coffee producer, 760,963 tons produced from 1.2 million hectares of land consisting of smallholder plantations (Perkebunan Rakyat / PR), large private plantations (Perkebunan Besar Swasta / PBS), and large state plantations (Perkebunan Besar Negara / PBN). The productivity of the plantation can be seen from comparing the area of the plantation with the production of coffee, the national productivity has only reached 0.77 tons of greenbean coffee/ha/year. This figure is considered still very small when compared to its potential which reaches 3tons of greenbean coffee/hectare/year. Temporal mapping method can be used to find out the level of productivity more easily based on location and time. Thus, the priority of handling coffee area becomes more focused and on target. The web-based GIS platform provides flexibility in terms of access and attractive appearance. The information presented is more communicative and easy to understand for interested users. This study uses ArcGIS Online with an operation dashboard to visualize the results of this study. The results showed that in the last two years arabica productivity in 2019 and 2018 was the highest in West Phak - Phak district with a figure of 1,575 kg/ha in 2019 and 1,580 kg/ha and the lowest was in Tabanan Regency at 29 kg/ha in 2019 and located in Wonosobo Regency at 26 kg/ha in 2018. For robusta in 2019 the highest was in Ogan Komering Ulu Timur district with a figure reaching 5,186 kg/ha and in 2018 the highest was in Kota Pagar Alam district with a figure reaching 2,890 kg/ha. ha and the lowest was in Muna Regency at 57 kg/ha in 2019 and in Nias Regency at 12 kg/ha in 2018.Keywords: ArcGis, Coffee, Coffee Producer, Operation Dashboard, Yield,

A web-based GIS platform supporting innovative irrigation management techniques at farm-scale for the Mediterranean island of Crete

The aim of this paper is the creation of an integrated and free-access web platform for parcel irrigation water management on a large spatial scale (Water District of Crete, in Greece) in order to: a) accurately determine the irrigation needs of the main crops for Crete such as olives, citrus, avocados and vineyards, b) design strategies, for optimal adaptation of the agricultural sector in the context of climate change, and c) incorporate the dynamic integration of the above information through the creation of a digital platform. In the proposed decision-making system, essential factors are taken into account, such as real-time meteorological data, information about the type and spatial distribution of the agricultural parcels in Crete, algorithms for calculation crop evapotranspiration per development stage and age of the crops, satellite remote sensing techniques in combination with field surveys to depict accurate soil texture map for the whole island of Crete as well as sustainable cultivation practices for saving water per crop and parcel geomorphology. Based on the proposed decision-making system, users will have the opportunity in any specific location/farm in Crete to know the irrigation needs of the crops in real-time and obtain information about proper climate-water adaptation practices. The main novelty points of the proposed platform include the derivation of parcel-level soil texture data from Sentinel-2 satellite imagery and field samples, the comprehensiveness of the irrigation management information, the relatively low data requirements and the application interface simplicity provided to the end-user.

Designing a Multicriteria WebGIS-Based Pre-Diagnosis Tool for Indoor Radon Potential Assessment

Radon (222Rn) is a well-known source of indoor air contamination since in its gaseous form it is a reported source of ionizing radiation that belongs to the group of rare gases. Radon occurs naturally in soils and rocks and results from the radioactive decay of its longer-lived progenitors, i.e., radium, uranium, and thorium. Radon releases itself from the soil and rocks, which mainly occurs in outdoor environments, not causing any kind of impact due to its fast dilution into the atmosphere. However, when this release occurs in confined and poorly ventilated indoor environments, this release can result in the accumulation of high concentrations of radon gas, being recognized by the World Health Organization (WHO) as the second cause of lung cancer, after smoking. Assessing the indoor radon concentration demands specific know-how involving the implementation of several time-consuming tasks that may include the following stages: (1) radon potential assessment; (2) short-term/long-term radon measurement; (3) laboratory data analysis and processing; and (4) technical reporting. Thus, during stage 1, the use of indirect methods to assess the radon occurrence potential, such as taking advantage of existent natural radiation maps (which have been made available by the uranium mineral prospecting campaigns performed since the early 1950s), is crucial to put forward an ICT (Information and Communication Technology) platform that opens up a straightforward approach for assessing indoor radon potential at an early stage, operating as a pre-diagnosis evaluation tool that is of great value for supporting decision making towards the transition to stage 2, which typically has increased costs due to the need for certified professionals to handle certified instruments for short-term/long-term radon measurement. As a pre-diagnosis tool, the methodology proposed in this article allows the assessment of the radon potential of a specific building through a WebGIS-based platform that adopts ICT and Internet technologies to display and analyze spatially related data, employing a multicriteria approach, including (a) gamma radiation maps, (b) built environment characteristics, and (c) occupancy profile, and thus helping to determine when the radon assessment process should proceed to stage 2, or, alternatively, by eliminating the need to perform additional actions.

DEVELOPMENT OF THE IM4MANILABAY MAPABLE WEB PORTAL

Abstract. Products and outputs for water quality monitoring are made available in the IM4ManilaBay MapABLE Web Portal, a web-based GIS platform that serves as a repository of processed maps for Manila Bay and linked systems. The Portal is also linked with the MASDAN mobile application that has been developed to allow the public to report different environmental issues. The web development involved the utilization of geospatial content management system, spatial database system, operating systems, programming, and style language. Services included frontend and backend development. The Web Portal serves as a repository for all outputs derived for water quality monitoring. It contains processed results, technical overview on the developed models and tools, historical data viewing and use of basic geoprocessing tools, and viewing of reported incidents from the MASDAN app. It is expected that the Web Portal will contribute significantly in the efforts of communities and environmental agencies to implement policies for sustainable development and management of Manila Bay and its watershed.

A WebGIS-Based Platform for Sewage Treatment Facilities in Villages and Small Towns Near the Lake Dian

Lake Dian is one of “Three-river and Three-lake Project” that focus on water pollution prevention and control in China. Rural non-point source pollution is increasing year by year. In order to effectively control the amount of sewage from villages and small towns entering the lake, a full coverage of treatment facilities has been built near the Lake Dian. Among them, the facilities are scattered in the eight districts and two counties of Kunming City, Yunnan Province. It is so difficult to manage that we have to rely on WebGIS technology for management and analysis. This paper designs a visualization platform for sewage treatment facilities in villages and small towns, which is a three-tier system architecture of B/S model. The system takes the map engine of ArcGIS API for JavaScript and the component development of Vue.js as the technical core, combined with ArcGIS Online service portal and spatial database technology. It finishes function implementation such as the visualization of the treatment situation and data management. The platform can scientifically analyse the problems in the construction, management, and operation of sewage treatment facilities in villages and small towns. It improves the ability to share information, and provide decision-making support to the sewage treatment department of the Lake Dian.

Perceived safety and fear of crime: A web-based GIS platform.

Fear of crime is a social phenomenon that mainly affects the population of urban communities and it is recognized as an issue by both the academic community and society itself. To study the phenomenon, it is necessary to collect primary data, either using traditional data collection methods or using well-established online questionnaires. This paper describes the process and architecture of developing an interactive data survey, analysis, and geovisualization web-based platform to support online questionnaires and surveys, related to the urban fear of crime. The main goal is to provide tools and utilities for researchers, journalists, groups or individuals, interested in the scientific aspect of fear of crime, to collect related data and analyze them within a common interface. The fear of crime platform utilizes a client-server Web-GIS application that gives access to a worldwide spatial database. As the fear of crime platform is a dynamic ecosystem that grows up every day, this database is also growing proportionally by individuals around the world. The project’s development is accessible at the following web address: www.fearofcrime.com

A Web GIS-Based Platform to Harvest Georeferenced Data from Social Networks: Examples of Data Collection Regarding Disaster Events

Whenever disaster situations occur the civil protection authorities need to have fast access to data that may help to plan emergency response. To contribute to the collection and integration of all available data a platform that aims to harvest Volunteered Geographical Information (VGI) from social networks and collaborative projects was created. This enables the integration of VGI with data coming from other sources, such as data collected by physical sensors in real time and made available through Applications Programming Interface (APIs), as well as, for example, official maps. The architecture of the created platform is described and its first prototype presented. Some example queries are performed and the results are analyzed.

Improving the Protection of Children Against Air Pollution Threats in Romania � The RokidAIR Project Approach and Future Perspectives

This paper presents the approach used to develop the information chain required to reach the objectives of the EEA Grants� RokidAIR project in two Romanian cities i.e., Targoviste and Ploiesti. It describes the PM2.5 monitoring infrastructure and architecture to the web-based GIS platform, the early warning system and the decision support system, and finally, the linking of air pollution to health effects in children. In addition, it shows the analysis performance of the designed system to process the collected time series from various data sources using the benzene concentrations monitored in Ploiesti. Moreover, this paper suggests that biomarkers, mobile technologies, and Citizens� Observatories are potential perspectives to improve data coverage by the provision of near-real-time air quality maps, and provide personal exposure and health assessment results, enabling the citizens� engagement and behavioural change. This paper also addresses new fields in nature-based solutions to improve air quality, and studies on air pollution and its mental health effects in the urban areas of Romania.

A web-based GIS platform for the safe management and risk assessment of complex structural and infrastructural systems exposed to wind

This paper describes an extensive research activity, carried out at the University of Genova, aimed at developing an integrated web-based GIS platform for the safe management and risk assessment of complex port areas exposed to intense wind actions. This activity, carried out through the Projects “Wind and Ports” and “Wind, Ports and Sea”, financed by the European Territorial Cooperation Objective, Cross-border program “Italy–France Maritime 2007–2013”, includes the realization of a wide in situ monitoring network, specific numerical codes for the multi-scale simulation of wind and wave fields, wind and wave forecasting algorithms, and statistical wind climate analyses. All the results obtained are made directly available to the port operators through a web-based GIS platform integrated into a global system for the safe and operational management of the port areas involved in the above projects. In particular, the monitoring and forecasting systems work out operative results in continuous mode. The generality of the implemented platform makes it immediately suitable for applications to any port reality worldwide and, even more, to any complex structural and infrastructural system under wind actions.

Developing an integrated 2D and 3D WebGIS-based platform for effective landslide hazard management

Collaborative effort for the improvement of landslide database is important during the long-term risk reduction process in large hilly and mountainous regions. This paper presents a novel 2D and 3D WebGIS-based platform for landslide multi-level management and emergency response. The scalable network architecture and three-tier software architecture are designed to support survey data improvement performed by geological surveys in different administrative levels, fast spatial decision support for rescue and evacuation after sudden hazard incidents, as well as prevention information for public access. The web service integration is widely applied in the platform, and proved useful for keeping landslide-related information consistent and up-to-date, since it relies on joint efforts from different government departments with expertise, rather than the local and independent storage pattern. The combined utilization of 2D and 3D WebGIS takes advantage of their respective superiorities, and generates a superior display and analytic web environment for local decision-makers. The 2D map in ArcGIS Flexviewer is mainly for hazard query, spatial statistics and map overlaying analysis during routines, while the 3D scene in Skyline ActiveX component is useful in terrain exploration, rainfall situation analysis and sketch map plotting in emergencies. After elaborating the main modules and key algorithms, the user-friendly platform has been experimented and accepted by three levels of geological surveys in Zhejiang Province, China, and presented as an integrated WebGIS environment for effective landslide hazard management in large prone areas.

3D WebGIS-based platform for debris flow early warning: A case study

In mountainous areas of Southwestern China, debris flows occur every rainy season in recent years and have become one of the main threats to human life and properties. After a giant debris-flow event on August 13, 2010 in Sichuan province, the need to deploy a real-time monitoring network and early warning system (EWS) in this region with high potential risk became of paramount importance. This paper, therefore, presents a proposal for a 3D WebGIS-based platform combined with wireless sensor network (WSN) for debris-flow monitoring, analysis of rainfall thresholds for potential debris-flow gullies, and preliminary criteria for automatic and continuous monitoring and alert of debris flows. The choice of a WSN environment simplifies data collection, especially for the combination of various monitoring data provided by different sensor terminals. Warning thresholds stored in the database can easily be modified to improve the prediction of debris-flow occurrence, and there is a user-friendly 3D graphical interface which allows an almost real-time solution for decision-makers. The automatic computer-based EWS applied in the case study proves to be useful for debris-flow early warning, and improvements expected from continuation of this study could ultimately reduce the losses caused by such type of natural hazard.

웹기반 GIS 플랫폼 상 가시화 처리를 위한 대용량 BIM 데이터의 경량화 알고리즘 제시

AbstractBIM Technology contains data from the life cycle of facility through 3D modeling. For these, one building products the huge file because of massive data. One of them is IFC which is the standard format, and there are issues that large scale data processing based on geometry and property information of object. It increases the rendering speed and constitutes the graphic card, so large scale data is inefficient for screen visualization to user. The light weighting of large scale BIM data has to solve for process and quality of program essentially. This paper has been searched and confirmed about light weight techniques from domestic and abroad researches. To control and visualize the large scale BIM data effectively, we proposed and verified the technique which is able to optimize the BIM character. For operating the large scale data of facility on web based GIS platform, the quality of screen switch from user phase and the effective memory operation were secured.Keywords:Building Information Modeling, Data light weighting, Geographic Information System, Industry Foundation Classes, Visualization

DEVELOPMENT OF OBSTACLE AVOIDANCE TECHNIQUE IN WEB-BASED GEOGRAPHIC INFORMATION SYSTEM FOR TRAFFIC MANAGEMENT USING OPEN SOURCE SOFTWARE

The shortest path routing is one of the well-known network analysis techniques implemented in road management systems. Pg Routing as an extension of Postgre SQL/Post GIS database is an open source library that implements the Dijkstra shortest path algorithm. However, the functionality to avoid obstacles in that analysis is still limited. Therefore, this study was conducted to enable obstacle avoidance function in the existing pgRouting algorithm using OpenStreetMap road network. By implementing this function, it enhances the Dijkstra algorithm ability in network analysis. In this study a dynamic restriction feature is added at the program level to represent the obstacles on the road. With this modification the algorithm is now able to generate an alternative route by avoiding the existence of obstacles on the roads. By using OpenLayers and PHP a web-based GIS platform was developed to ease the system’s usability.

Design and Implementation of a WebGIS-Based Platform for Water Integrated Management

Design and Implementation of a WebGIS-Based Platform for Water Integrated Management