A WebML-Based Approach for the Development of Web GIS Applications

Abstract. With the rapid development of geographic information services, Web Geographic Information Systems (WebGIS) have become an indispensable part of everyday life; correspondingly, map search engines have become extremely popular with users and WebGIS sites receive a massive volume of requests for access. These WebGIS users and the content accessed have regional characteristics; to understand regional patterns, we mined regional WebGIS user access patterns based on a weighted bipartite network. We first established a weighted bipartite network model for regional user access to a WebGIS. Then, based on the massive user WebGIS access logs, we clustered geographic information accessed and thereby identified hot access areas. Finally we quantitatively analyzed the access interests of regional users and the visitation volume characteristics of regional user access to these hot access areas in terms of user access permeability, user usage rate, and user access viscosity. Our research results show that regional user access to WebGIS is spatially aggregated, and the hot access areas that regional users accessed are associated with specific periods of time. Most regional user contact with hot accessed areas is variable and intermittent but for some users, their access to certain areas is continuous as it is associated with ongoing or recurrent objectives. The weighted bipartite network model for regional user WebGIS access provides a valid analysis method for studying user behaviour in WebGIS and the proposed access pattern exhibits access interest of regional user is spatiotemporal aggregated and presents a heavy-tailed distribution. Understanding user access patterns is good for WebGIS providers and supports better operational decision-making, and helpful for developers when optimizing WebGIS system architecture and deployment, so as to improve the user experience and to expand the popularity of WebGIS.

Due to problems in correctly understanding user requirements the Information System (IS) development community have recognised the need to involve end-users in the development and maintenance of web applications. End-users perceive web applications through user interfaces (UIs) and commonly use sketches of UIs to express their requirements. Thus, it would be desirable to provide an end-user development methodology centred on UI modelling techniques. In this paper a visual modelling approach is presented to empower end-users in developing data intensive web applications starting from user interface descriptions. The modelling language follows a holistic approach by representing both static and behavioural information of a web application in one visual model. The visual model allows the specification of the look-and-feel of the application through mock-ups, and the user interactions through links, annotations, and widget references. End-users are guided during the modelling process by providing a summary view to manage the design of complex applications and a data model view to improve the quality of the generated applications.

Analysising WEB Geographic Information System (WEBGIS) status, found that the existing problem in the current system, combine the SVG with the Ajax, propose a idea of constructing a new WEBGIS system. First introduce a variety of techniques used, SVG technology has such characteristics as small storage space and the strong intercommunication, illustrates the possibility of using this vector graphic Specification to develop WEBGIS system; Ajax technology has the advantage of "on-demand access data", shows that WEBGIS achieved by using Ajax to realize communication between client and server has many advantages such as image quality and high transmission speed; cache technology refers to use certain scheduling algorithm to achieve the proper storage of geographic data in order to improve system responsiveness. Second, design a four-story WEBGIS model based on B/S. Then introduce the key points of the model: the principle and technology of caching technology; the specific implementation of SVG uses hierarchical to express spatial data and interact with customers. And in order to improve data transmission speed, the system compresses transfer data, introduce the compression algorithm used, and test the system, compare the performance changes of the system. Finally, using SVG and Ajax techniques to achieve the WEBGIS system.

This paper addresses conceptual modeling and automatic code generation for search engine integration with data intensive Web applications. We have analyzed the similarities (and differences) between IR and database systems to extend an existing domain specific language for data-driven Web applications. The extended Web modeling language specifies the search engine’s index schemas based on the data schema of the Web application and uniquely designs the interaction between the database, the Web application, the search engine and users. We also provide an implementation of a CASE tool extension for visual modeling and code generation. Experimentation of the proposed approach has been successfully applied in the context of the COOPER project.

The aim of this study is to conduct a risk analysis of fluvial and pluvial flood disasters, focusing on the vulnerability of those residing in the river basin in coastal regions. However, there are numerous factors and indicators that need to be considered for this type of analysis. Swift and precise acquisition and evaluation of such data is an arduous task, necessitating significant public investment. Remote sensing offers unique data and information flow solutions in areas where access to information is restricted. The Google Earth Engine (GEE), a remote sensing platform, offers strong support to users and researchers in this context. A data-based and informative case study has been conducted to evaluate the disaster risk analysis capacity of the platform. Data on three factors and 17 indicators for assessing disaster risk were determined using coding techniques and web geographic information system (web GIS) applications. The study focused on the Filyos River basin in Turkey. Various satellite images and datasets were utilized to identify indicators, while land use was determined using classification studies employing machine learning algorithms on the GEE platform. Using various applications, we obtained information on ecological vulnerability, fluvial and pluvial flooding analyses, and the value of indicators related to construction and population density. Within the scope of the analysis, it has been determined that the disaster risk index (DRI) value for the basin is 4. This DRI value indicates that an unacceptable risk level exists for the 807,889 individuals residing in the basin.

This short paper aims at demonstrating the integration of workflow specifications with conceptual models for Web application design. In particular, we propose a visual editor of business process diagrams (according to the BPMN notation), which seamlessly integrates into the commercial CASE tool called WebRatio, which allows the designer to model data-intensive and service-intensive Web applications based on WebML (Web Modeling Language) models. A set of model transformations from BPMN workflow diagrams to WebML hypertext diagrams allows fast generation of site skeletons implementing the specified business process. Such skeletons can be modified by the designer that is relieved from the time-consuming and error-prone task of specifying all the details of the workflow constraints.

While buildingWeb applicationmodels fromscratch iswell-supported, reuse in Web application modeling is still in its infancy. A promising approach in this respect is aspect-oriented modeling to separate certain concerns from the base application, typically cross-cutting ones, and reuse them in various applications. A few Web modeling languages targeting the design phase have been already equippedwith aspect-orientation.However, languages for the early phases of Web modeling lack such support, but especially these phases would tremendously benefit from aspect-orientation. Moreover, all the existing solutions are tailored to a specific modeling language. To improve this situation, we consider aspectorientation itself as an aspect. This allows us to weave aspect-oriented language features into already existing Web modeling languages. We introduce a generic metamodel module comprising the main concepts of aspect-orientation as well as a tool-supported process to weave it into existing base languages. By having this systematic metamodel weaving process, dedicated modeling as well as designtime weaving support is provided for aspects out-of-the-box. We demonstrate our approach by aspectifying aWeb requirements modeling language based on i* and applying the aspectified version of it to a case study.

Significant effort is currently invested in application integration, enabling business processes of different companies to interact and form complex multiparty processes. Web service standards, based on WSDL (Web Service Definition Language), have been adopted as process-to-process communication paradigms. However, the conceptual modeling of applications using Web services has not yet been addressed. Interaction with Web services is often specified at the level of the source code; thus, Web service interfaces are buried within a programmatic specification.In this article, we argue that Web services should be considered first-class citizens in the specification of Web applications. Thus, service-enabled Web applications should benefit from the high-level modeling and automatic code generation techniques that have long been advocated for Web application design and implementation. To this end, we extend a declarative model for specifying data-intensive Web applications in two directions: (i) high-level modeling of Web services and their interactions with the Web applications which use them, and (ii) modeling and specification of Web applications implementing new, complex Web services.Our approach is fully implemented within a CASE tool allowing the high-level modeling and automatic deployment of service-enabled Web applications.

This research paper discusses about the application of Web-Based Geographical Information System (GIS), an ICT tool for electronic business; particularly through Internet, with a future plan to develop e-promotion and strategic marketing by implementing Web GIS tools for Geobusiness. In the context of e-business, this present study penetrates the usage of GIS to disseminate maximum level of information to the customers. On the other hand, it depicts the growing incorporation of GIS in target marketing, business management, and strategic decision-making processes. It discusses how this modern Geospatial Information Technology (GIT) tool is used for collecting and analyzing information for the efficient and effective management and promotion of e-commerce. Geographical Information System (GIS) is the fundamental science and technology for Geo Design, a systematic methodology of Geographic planning and decision making. Web GIS is the modern technology for capturing, storing, retrieving, mapping and analyzing spatial and non-spatial geographical data in the digital format over the internet. It provides all the GIS functions over the Web, these functions can, in turn, be applied in various sectors of e-business. This paper highlights on the technical aspects of Web GIS for strategic planning, daily business operations, supply chain management, marketing, customer service, improving efficiency and attaining competitive advantage for business organizations.

Monitoring and early warning system of porcine pasteurellosis based on WebGIS

In order to efficiently deal with paroxysmal events of waterborne traffic in Three Gorges reservoir area and aim at the goal of “rapid response, unified command and effective action”, the inland waterborne traffic emergency system based on WebGIS (Web Geographic Information System) was proposed. In this paper, the system which conformed to J2EE (Java 2 Platform Enterprise Edition) standard had a four-tier architecture consisting of client tier, web tier, business tier and EIS (Enterprise Information Systems) tier. Based on the system design and function analysis, the construction of this system was accomplished by integration of Java server pages (JSP) technology and WebGIS technology. The result of system run indicated that the ability of the administrative department was improved to dealing with paroxysmal events of waterborne traffic.

Implementation of BIM + WebGIS Based on Extended IFC and Batched 3D Tiles Data: An Application in RCC Gravity Dam for Republication of Design Change Model

Geographical Information System (GIS) applications are very helpful tools for displaying and analyzing information for several technological fields. The research group of Electrical Power System Lab (EPSL) of TEIC is developing a GIS software application for displaying the operational conditions of the power system of Crete, presenting also critical information and statistical data for system's characteristics. This tool is intended to help training of engineers in the Electrical Department of TEIC to simulate and visualize power system operation and characteristics. Besides, this tool is very helpful for a power system engineer in observing the whole system operations and system's data. All data used are derived from a database developed by EPSL. Digitalized maps of Crete Island use this database and display them optionally according to user's demand or choice. So, an authorized user can decide which data will be displayed on the map, and with a simple mouse click on a selected element of the map he can b informed about its characteristics. Furthermore, this application is being uploaded on web. This means that this application runs on a server of EPSL, which can serve distant users after authorization procedure. That distance user could be a trainee in his desk, or an engineer, or a researcher in the lab. One of the services that application provides is the load flow calculation on a specific part of the system, or for a specific scenario of system's operation.

Web GIS is a kind of distributed information system, which consists of a client and a server, where the server is the GIS server and the client is a web application, desktop application, or mobile application. With the rapid development of technology, increasingly mature GIS technology has been applied in various fields, one of which is tourism. By using a web GIS, reviews related to a tourism object, and tourist locations in a particular area can be easily presented on a website. By utilizing this geographic information system, the potential of tourist attractions and public facilities can be mapped to the maximum, so that tourists can find a place more efficiently and not take long. This study aims to find out the further study the tourism GIS web research over the last 3 years. This study uses the Systematic Literature Review (SLR) method where the search for the required papers comes from an electronic database obtained using the Vos Viewer and Publish or Perish software

Geography, as a discipline which examines the earth, aims to increase analytical thinking skills by instilling spatial thinking (ST) skills in students. The youth who enrich a sense of space with these talents will effectively solve the spatial problems they encountered. In the modern world, where spatial issues are frequently being faced with, ST is extremely important for analyzing and interpreting data. Geographical information systems (GIS) appear as a method commonly used to process data and transform it into spatial information. In this context, despite the renewal of the secondary education (SE) geography curriculum in T?rkiye, with the components required for the use of GIS at the SE level, prevented the use of GIS in SE from reaching the desired level. Developments in technologies have also caused significant changes in the field of GIS with the power of cloud technologies and, the work done in the personal computer environment has been moved to the internet environment. Web GIS applications, which can be used via a web browser, are much easier to use than desktop software and can reach many users from any device with the internet. Within the scope of the study, a sample application was designed to use web GIS tools in geography teaching. With the application, it is possible to assess the students? achievements in the geography lessons regarding verbal and spatial data. Thus, it was aimed to ensure the active participation of the students in the geography lessons, develop their ST ability, and perception of space.