Web mapping services

Η παρούσα μεταπτυχιακή διατριβή παρουσιάζει την ανάπτυξη μιας πρωτότυπης διαδικτυακής εφαρμογής επεξεργασίας γεωγραφικών δεδομένων για την αυτοματοποιημένη αναζήτηση και δημιουργία ένθετων σε χάρτες. Οι απαιτήσεις και η αναγκαιότητα του συγκεκριμένου συστήματος διαμορφώθηκαν από την ανάγκη ύπαρξης ενός εύχρηστου και αποδοτικού συστήματος που θα επιλύει χαρτογραφικά προβλήματα σχεδίασης και διάταξης για χάρτες που αναπαριστούν περιοχές με εδαφική ασυνέχεια. Η εφαρμογή αναπτύχθηκε σε διαδικτυακό περιβάλλον με τη γλώσσα προγραμματισμού Python, το πλαίσιο ανάπτυξης λογισμικού ιστού Django, το ολοκληρωμένο περιβάλλον ανάπτυξης PyCharm, το σύστημα διαχείρισης βάσεων δεδομένων PostgreSQL, τη διεπαφή διαδικτυακών χαρτών Leaflet και το σύστημα γεωγραφικών πληροφοριών QGIS.

This master thesis presents the development of a custom web application for geographic data processing about the automated search and creation of map insets. The requirements and necessity of this system were formed by the need for a user-friendly and efficient system to solve cartographic design and layout problems for maps that represent areas with land discontinuity. The application was developed in web environment with the Python programming language, the Django web framework, the PyCharm integrated development environment, the PostgreSQL database management system, the Leaflet web-mapping API and the QGIS geographic information system.

Os Sistemas de Informação Geográfica (SIG) permitem produzir, analisar, e gerenciar informações georeferenciadas. O desenvolvimento e popularização das Tecnologias de Informação e Comunicação (TIC) possibilitam a democratização dessa tecnologia. O presente artigo trata da Informação Geográfica veiculada na Web aplicada ao Patrimônio Cultural, traz exemplos e propostas de classificação quanto ao conteúdo e tecnologia, de projetos que tem por base a documentação do patrimônio.

WEB-BASED TOURISM INFORMATION SYSTEM OF KEMALİYE DISTRICT (ERZİNCAN)

The aim of this study is to create a web-based tourism information system of Kemaliye District of Erzincan Province. Kemaliye, a candidate place to world cultural heritage with its
Dark Canyon, historical Kemaliye Houses, is one of the important alternative tourism centers of Turkey with its cold water resources especially Kadıgölü, Karasu River and Keban Dam allowing river tourism, convenient field condition for different nature sports, diversity in flora and fauna, plateaus, landscape beauties, folkloric richness and rich cultural heritage. In tourism industry, advertisement is important as much as potentiality and facilities of that place. In today's world, one should use information technology systems in a maximum level in order to evaluate exactly a place's tourism potentiality. In this context, tourism
information systems which are developing rapidly in the world aid tourists with informatics services in many issues such as hosting, transportation, nutrition, shopping in addition to
foreign language support. In parallel with these facilities, the systems also allow very different booking services to users. In the forming process of Kemaliye District Web Based Tourism
Information System, firstly touristic information and pictures related to the area were gathered, and then obtained data were coded numerically and they were stored in the database. After determining the coordinates of touristic sites and places with GPS, they were integrated to the system. Finally, information was broadcasted on the website which was developed with HTML, ASP, JavaScript and DTHML languages. The system allows users to search in the database in addition to information sharing facility.

KEMALİYE İLÇESİ (ERZİNCAN) WEB TABANLI TURİZM BİLGİ SİSTEMİ

Bu çalışmanın amacı, Erzincan iline bağlı Kemaliye ilçesine web tabanlı turizm bilgi sistemi oluşturmaktır. Kemaliye ilçesi; Karanlık Kanyon, tarihî Kemaliye Evleri, dünya kültür mirasına aday gösterilen Kemaliye kasabası, başta Kadıgölü olmak üzere soğuk su kaynakları, akarsu turizmine olanak tanıyan Karasu Irmağı ve Keban Barajı, çeşitli doğa sporlarına uygun arazi koşulları, flora ve fauna zenginliği, yaylaları, manzara güzelliği, folklorik çeşitliliği, festivalleri ve zengin kültür mirasıyla Türkiye’nin önemli alternatif turizm merkezlerinden birisidir.

Turizm sektöründe potansiyel ve olanaklar kadar, tanıtım da büyük önem taşır. Günümüz koşullarında bir yerin turizm potansiyelini tam olarak değerlendirebilmek için, bilgi
teknolojilerinden maksimum düzeyde yararlanmak gerekmektedir. Bu bağlamda dünyada giderek yaygınlaşan turizm bilgi sistemleri turistlere yabancı dil desteğiyle tanıtıcı bilgiler
vermenin yanında; konaklama, ulaşım, beslenme ve alışveriş gibi konularda da enformasyon hizmeti sunmaktadırlar. Hatta sistem üzerinden çok çeşitli rezervasyonlar dahi yapılabilmektedir. Kemaliye İlçesi Web Tabanlı Turizm Bilgi Sistemi’nin oluşturulması sürecinde öncelikli olarak yöreye ait turistik veriler ve görseller derlenmiştir. Ardından mevcut veriler sayısallaştırılmış ve tarafımızdan veritabanında depolanmıştır. Turistik mevkilerin ve mekanların koordinatları GPS (Global Positioning System) ile belirlendikten sonra sisteme entegre edilmiştir. Son olarak da bilgiler; HTML, ASP, JavaScript ve DTHML dilleriyle geliştirilen bir web sitesi üzerinden yayımlanmıştır. Sistemde, bilgi paylaşımıyla
birlikte, sorgulama da yapılabilmektedir.

One of the most widely-implemented service standards provided by the Open Geospatial Consortium (OGC) to the user community is the Web Map Service (WMS). WMS is widely employed globally, but there is limited knowledge of the global distribution, adoption status or the service quality of these online WMS resources. To fill this void, we investigated global WMSs resources and performed distributed performance monitoring of these services. This paper explicates a distributed monitoring framework that was used to monitor 46,296 WMSs continuously for over one year and a crawling method to discover these WMSs. We analyzed server locations, provider types, themes, the spatiotemporal coverage of map layers and the service versions for 41,703 valid WMSs. Furthermore, we appraised the stability and performance of basic operations for 1210 selected WMSs (i.e., GetCapabilities and GetMap). We discuss the major reasons for request errors and performance issues, as well as the relationship between service response times and the spatiotemporal distribution of client monitoring sites. This paper will help service providers, end users and developers of standards to grasp the status of global WMS resources, as well as to understand the adoption status of OGC standards. The conclusions drawn in this paper can benefit geospatial resource discovery, service performance evaluation and guide service performance improvements.

Accessibility is a fundamental aspect in transportation, routing, and spare-time activity planning concerning traveling in modern cities. In this context, interactive web-based accessibility-map visualization techniques and systems are important tools for provisioning, exploration, analysis, and assessment of multi-modal and location-based travel time data and routing information. To enable their effective application, such interactive visualization techniques demands for flexible mappings with respect to user-adjustable parameters such as maximum travel times, the types of transportation used, or used color schemes. However, traditional approaches for web-based visualization of accessibility-maps do not allow this degree of parametrization without significant latencies introduced by required data processing and transmission between the routing server and the visualization client. This paper presents a novel web-based visualization technique that allows for efficient client-side mapping and rendering of accessibility data onto transportation networks using WebGL and the OpenGL transmission format. A performance evaluation and comparison shows the superior performance of the approach over alternative implementations.

Los países de Iberoamérica, al igual que el resto del mundo, enfrentan retos nacionales cuya solución se soporta, cada vez más, en la aplicación de las Tecnologías de la Información y las Comunicaciones. Por otra parte, la importancia de la componente geoespacial en la sociedad es reconocida universalmente al afirmarse que entre el 80% y el 90 % de toda la información involucrada en la toma de decisiones de los gobiernos, es georeferenciada. La presente investigación expone la implementación de un Servicio web  de Información Geográfica Temática Georreferenciada (Mapoteca Digital) en correspondencia con los objetivos e intereses generales y específicos del proceso de informatización de la sociedad cubana y del Programa Ramal del Desarrollo de la Red de la Ciencia en Cuba. http://www.redciencia.cu/.

Improving the use of vector data in web mapping is often shown as an important challenge. Such shift from raster to vector web maps would open web mapping and GIS to new innovations and new practices. The main obstacle is a performance issue: Vector web maps in nowadays web mapping environments are usually too slow and not usable. Existing techniques for vector web mapping cannot solve alone the performance issue. This article describes a unified framework where some of these techniques are integrated in order to build efficient vector web mapping clients and servers. This framework is composed of the following elements: Specific formats for vector data and symbology, vector tiling, spatial index services, and generalization for multiscale data. A prototype based on this framework has been implemented and has shown satisfying results. Some principles for future standards to support the development of vector web mapping are given.

Il quarto capitolo del libro affronta l'argomento della cartografia di base a disposizione per la redazione di un progetto di cartografia archeologica.
Vengono passati in rassegna i principali repertori (IGM, CTR, cartografia catastale, tematica e aerofotografica) e viene presentato l'uso dei servizi di web-mapping per la ricerca e georeferenziazione dei siti archeologici.

Geographic Information Systems (GIS) is a data processing system which accepts all objects on the earth as geographic data, and shows these over a numeric platform with its unique methods. GIS has developed rapidly in recent years in parallel with information technologies. Then many institutions
especially related with organizing and planning the environments,
municipalities, armed forces, tourism agencies, and educators are in an effort to benefit from this data processing system in the highest level.

Some companies having the authority in information technologies share their products with their customers via GIS. These products’ enriched contents help users explore different places of the earth and new opportunities. In today’s world, it is easy to reach many free and paid services from motionless
views, navigation, traffic jam, to hotel reservation in the virtual environment (web). But the use of information technologies creates some problems in parallel with its benefits. The leading problem of them is how to use these technologies with the lowest price and the most effective way.

In this study, web-based GIS programmes which have developed
rapidly especially in the last decade, their performances and qualifications were investigated. In this context, four main web-based map systems’ (Google Maps, BingMaps, Yahoo! Maps, OviMaps) online GIS services were examined with some tests in terms of speed, security, reliability, accessibility, and extensibility.

Key words: Geographic Information Systems (GIS), Web Mapping Services, Web-based GIS

The adoption of business processes to design business activities is becoming a reality to a significant number of companies. In addition, the Service-Oriented Architecture (SOA) is being used in diverse situations for the execution of business processes using computational resources. In this context, the need of business process automation appears with high relevance. In this work, we present a solution named BPA-SOA, which aims to automate SOA-based business processes, specified in BPMN, into WS-BPEL executable processes. In BPA-SOA, business and service information can be specified at the business level, translated into executable artifacts, deployed in execution-level resources and enforced at runtime. An illustrative scenario is presented to better illustrate and showcase the proposed solution.

Данная работа представляет результат геопространственного анализа выбранной территории (западная часть Турции, регион Измир) с комбинированным использованием космических снимков Google Earth, Landsat TM и ГИС ПО Erdas Imagine. В работе рассмотрены преимущества совместного использования космических снимков разной категории и детальности (мультиспектральные снимки Landsat TM и ETM+, а также Google Earth веб-сервис) вкупе с ГИС обеспечением для задач геопространственного анализа, часто решаемые в Высшей школе на курсах географии и наук о Земле. Данная работа приводит пример успешного изучения ландшафтов. Изучение распространения различных типов земной поверхности, моделированное с помощью Landsat TM и Google Earth позволяет анализировать динамику изменений ландшафтов, а также подтверждает возможность эффективного использования веб-сервиса Google Earth для тематического картографирования. Для классификации снимков были использованы технологии обработки снимков методами доступных модулей ПО Erdas Imagine. Веб-сервис Google Earth был успешно использован для верификации и валидации результатов картографирования с помощью модуля «Linking with Google Earth».

Big data storage management is one of the most challenging issues for Grid computing environments, since large amount of data intensive applications frequently involve a high degree of data access locality. Grid applications typically deal with large amounts of data. In traditional approaches high-performance computing consists dedicated servers that are used to data storage and data replication. In this paper we present a new mechanism for distributed and big data storage and resource discovery services. Here we proposed an architecture named Dynamic and Scalable Storage Management (DSSM) architecture in grid environments. This allows in grid computing not only sharing the computational cycles, but also share the storage space. The storage can be transparently accessed from any grid machine, allowing easy data sharing among grid users and applications. The concept of virtual ids that, allows the creation of virtual spaces has been introduced and used. The DSSM divides all Grid Oriented Storage devices (nodes) into multiple geographically distributed domains and to facilitate the locality and simplify the intra-domain storage management. Grid service based storage resources are adopted to stack simple modular service piece by piece as demand grows. To this end, we propose four axes that define: DSSM architecture and algorithms description, Storage resources and resource discovery into Grid service, Evaluate purpose prototype system, dynamically, scalability, and bandwidth, and Discuss results. Algorithms at bottom and upper level for standardization dynamic and scalable storage management, along with higher bandwidths have been designed.

Geodetic Documentation Centers collect geodetic and cartographic resources. The resources include spatial data and their metadata. European Union INSPIRE directive imposes an obligation on GDC to publish selected data in the Internet. In this paper, an adequate form of publication is discussed on the base of iGeoMap application.

The Internet application iGeoMap merges data from various resources. Depending on the data to present, different types of resources are used. The application can publish spatial data from files (text or binary), a database specialized in spatial data service (PostgreSQL, ORACLE), or web services (Web Map Service, Web Feature Service). Utilization of various data sources by the application is presented in this paper.

As a part of the subject, searches of the  most popular data (parcels, address points, and control points) are discussed. Various data sources and searching mechanisms involved by the searches in iGeoMap are presented in use cases.

Internet maps could be improved with the use automated mapping methods, especially automated generalisation techniques. This article analyses why automated generalisation is not used in web mapping and presents a some solutions to plug generalisation on the web.

Web Services technology has the potential to cater an enterprise's needs, providing the ability to integrate different systems and application types regardless of their platform, operating system, programming language, or location. Web Services could be deployed in traditional, centralized or brokered client server approach or they could be in peer to peer manner. Web Services could act as a server providing functionality to a requester or act as a client, receiving functionality from any service. From the performance perspective the availability of Web Services plays an important role among many parameters.

ABSTARCT Web Service is a reusable component which has set of related functionalities that service requesters can programmatically access from the service provider and manipulate through the Web. One of the main security issue is to secure web services from the malicious requesters. Since trust plays an important role in many kinds of human communication, it allows people to work under insecurity and with the risk of negative cost, many researchers have proposed different trust based web services access control model to prevent malicious requesters. In this literature review, various existing trust based web services access control model have been studied also investigated how the concept of a trust level is used in the access control policy of a service provider to allow service requester to access the web services.

The Geographic Information Systems (GIS) allow producing, analyzing, and managing geo-referenced data. The development and popularization of information technologies (ICT) make possible the democratization of technology. This article discusses Geographic Information disseminated on the Web applied to Cultural Heritage, with examples and suggestions for classification as to content and technology on projects that builds heritage’s documentation.

Abstract–Pollution of the environment is a problem of the modern age. The technology developed and used over the past decades has left serious consequences on human environment and implied the need for resolving them. Preserving quality of water, air and soil are quite common issues in many countries. This paper presents one way of dealing with these challenges, based on sensor networks and the Sensor Web concept. The solution is given as GinisSense system. GinisSense is designed accordingly to Open Geospatial ...

Oleh karena itulah tutorial ini berusaha menjawab seperti apa langkah mengonsumsi layer WMS dan WFS (baik dari GeoServer maupun ArcGIS Server) dengan memanfaatkan platform berbayar, yakni ArcGIS Pro. ArcGIS Pro sendiri adalah software SIG desktop yang bisa dikatakan terbaru dari ESRI. Berbeda dengan ArcGIS Desktop yang terbagi berdasarkan fungsinya, yakni ArcMap untuk data spasial 2D dan ArcScene untuk data spasial 3 dimensi, ArcGIS Pro mencakup keduanya sekaligus.

Baca Selengkapnya >>> https://spasialkan.com/2018/07/14/tutorial-menambahkan-data-wms-wfs-ke-dalam-arcgis-pro

The growing proliferation of distributed information systems, allows organizations to offer their business processes to a worldwide audience through Web services. Semantic Web services have emerged as a means to achieve the vision of automatic discovery, selection, composition, and invocation of Web services by encoding the specifications of these software components in an unambiguous and machine-interpretable form. Several frameworks have been devised as enabling technologies for Semantic Web services. In this paper, we survey the prominent Semantic Web service frameworks. In addition, a set of criteria is identified and the discussed frameworks are evaluated and compared with respect to these criteria. Knowing the strengths and weaknesses of the Semantic Web service frameworks can help researchers to utilize the most appropriate one according to their needs.

The increasing interest in developing efficient and effective optimization techniques has conducted researchers to turn their attention towards biology. It has been noticed that biology offers many clues for designing novel optimization techniques, these approaches exhibit self-organizing capabilities and permit the reachability of promising solutions without the existence of a central coordinator. In this paper we handle the problem of dynamic web service composition, by using the clonal selection algorithm. In order to assess the optimality rate of a given composition, we use the QOS attributes of the services involved in the workflow as well as, the semantic similarity between these components. The experimental evaluation shows that the proposed approach has a better performance in comparison with other approaches such as the genetic algorithm.

– Pollution of the environment is a problem of the modern age. The technology developed and used over the past decades has left serious consequences on human environment and implied the need for resolving them. Preserving quality of water, air and soil are quite common issues in many countries. This paper presents
one way of dealing with these challenges, based on sensor networks and the Sensor Web concept. The solution is given as GinisSense system. GinisSense is designed accordingly to Open Geospatial Consortium specifications and recommendations for the field of Sensor Web. This paper explains GinisSense
architecture and presents its opportunities for environmental monitoring, preservation and protection.

Google Earth (GE) and related open geospatial technologies have changed both the accessibility of and audience for geospatial information dramatically. Through data rich applications with easy to use interfaces, these technologies bring personalized geospatial information directly to the nonspecialist. When coupled with open geospatial data standards, such as Web Map Services (WMS), Web Features Services (WFS), and GeoRSS, the resulting web-based technologies have the potential to assimilate heterogeneous data from distributed sources rapidly enough to support time critical activities such as crisis response. Although the ability to view and interact with data in these environments is important, this functionality alone is not sufficient for the demands of crisis response activity. For example, GE’s standard version currently lacks geoanalysis capabilities such as geographic buffering and topology functions. In this paper, we present development of the “Google Earth Dashboard” (GED), a web-based interface powered by open geospatial standards and designed for supplementing and enhancing the geospatial capabilities of GE. The GED allows users to create custom maps through WMS layer addition to GE and perform traditional GIS analysis functions. Utility of the GED is presented in a usecase scenario where GIS operations implemented to work with GE are applied to support crisis management activities. The GED represents an important first step towards combining the ubiquity of GE and geospatial standards into an easy-to-use, data rich, geo-analytically powerful environment that can support crisis management activity.

Os Sistemas de Informação Geográfica (SIG) permitem produzir, analisar, e gerenciar informações georeferenciadas. O desenvolvimento e popularização das Tecnologias de Informação e Comunicação (TIC) possibilitam a democratização dessa tecnologia. O presente artigo trata da Informação Geográfica veiculada na Web aplicada ao Patrimônio Cultural, traz exemplos e propostas de classificação quanto ao conteúdo e tecnologia, de projetos que tem por base a documentação do patrimônio.

Digital maps are ubiquitous, supporting countless online activities. Most interactive mapping platforms support three user operations to move across space: zooming in, zooming out, and panning. While using interactive maps, it is common for users to land in an unfamiliar area at high zoom levels. To understand the location of the area, users zoom out, identify known objects, such as large cities and other landmarks, and zoom back into the target area, an operation known as confirmation of relative position. This operation is cognitively complex, time-consuming, and prone to cause disorientation. This article outlines a generic framework to support map navigation by placing contextual information around the map, bridging the on-and off-screen spaces. The proposed framework allows the dynamic generation of spatial cues in a context frame in the map that shows objects located outside of the map, reducing the need for relative positioning. The approach is based on an algorithm that ranks the prominence of nearby objects, and is illustrated in a case study about a small Italian town. This framework can also support cognitive mapping, showing spatial relations between geographical objects in a novel way. The source code and a demo of the framework are available online.

Melalui tulisan ini akan kita kupas bagaimana cara mengonsumsi (memanggil/membuka/mengunduh) data geospasial yang sudah berupa gis services, karena boleh jadi kebanyakan orang belum memanfaatkan lantaran tidak tahu caranya. FYI, sebenarnya data web services semacam WMS dan WFS ini bisa dipanggil ke dalam web GIS maupun ke dalam platform SIG desktop.

Baca Selengkapnya >>> https://spasialkan.com/2018/07/07/cara-menambahkan-membuka-layer-wms-wfs-dengan-qgis