Geographical Information Systems Participating Into the Pervasive Computing

Total Page:16

File Type:pdf, Size:1020Kb

Geographical Information Systems Participating Into the Pervasive Computing GEOProcessing 2014 : The Sixth International Conference on Advanced Geographic Information Systems, Applications, and Services Geographical Information Systems Participating into the Pervasive Computing Nuhcan Akçit Emrah Tomur Department of Geodetic and Geographic Information Department of Information Systems Technologies Middle East Technical University Middle East Technical University Ankara, Turkey Ankara, Turkey [email protected] [email protected] Mahmut Onur Karslıoğlu Department of Civil Engineering, Geomatics Engineering Division, Department of Geodetic and Geographic Information Technologies Middle East Technical University Ankara,Turkey [email protected] Abstract—The popular term “pervasive computing” describes science are remote sensing, surveying, photogrammetry, and the concept of computers being everywhere. The Geographic analyzing spatial data. Information System (GIS) technology began with completely The focus of this paper is GISs, which are becoming part centralized systems after the influence of the Internet; the GIS of the ubiquitous computer domain. In this paper, we then changed into decentralized systems. In the last few years, provide a brief information about the GIS and its the GISs have been included in many areas of pervasive computing, such as the Internet of Things and sensor development from the 1990s to 2010. We mainly focus on networks. Changing and developing states of the GIS such as after 90’s because distributed and Internet GIS [2] started to Internet, mobile, web GIS, ubiquitous GIS, the Internet of be formed in this period, and our ubiquitous domain is more Things and sensor network are the different elements of the interested in development after 90’s. We also discuss future evolution. From the beginning of the evolution until today, trends in this area. The GISs are huge; therefore, we focus pervasive computing is described in this study. In addition to on the development and evolution of the ubiquitous and GIS as a part of pervasive computing technology, the activity pervasive computing domains. Thus, elements of the of Open Geospatial Consortium (OGC), which works on development of the GISs are beyond the scope of this paper. geospatial and location standards in these technologies, is also The GIS is not familiar to the public. We first provide discussed. This paper investigates the evolution of GISs from centralized systems to a distributed system, summarizes the general information about the GIS and application areas. steps and use areas of the GISs to participation in pervasive Then, we discuss the evolution of the GIS from the 1990s to computing, and compares different GISs concepts in today [2]. In the last few years, the GISs have become a application areas. In addition, future trends and expectations larger part of the ubiquitous domain [7]. This study is a brief of the GISs are included. summary based on books, articles, and other sources. We mainly investigate information about the GIS, development Keywords-GIS; pervasive computing; WEB GIS; mobile stages, and evolution steps until today. GIS; Internet of Things This paper is structured as follows: We discuss GISs in I. INTRODUCTION Section 2. The effects of the Internet on GISs are analyzed The Geographic Information System (GIS), a system in Section 3. Data Centralized-distributed GISs are designed to store, capture, analyze, manipulate, and manage considered in the Section 4. Decentralized distributed GISs all types of geographic data, is an interdisciplinary area that are considered in Section 5 (location-based services, web combines cartography, analysis, statistics, and computer GIS, mobile GIS, the open geospatial consortium, technology [1]. ubiquitous GIS sensor network, and the Internet of Things). In recent years, ubiquitous and pervasive computing domains have increased considerably. They are a part of the II. THE GEOGRAPHIC INFORMATION SYSTEMS daily life because of the technological evolution and new Generally, GISs are systems that “integrate hardware, applications. In this paper, the goal is to provide information software, and data for capturing, managing, analyzing, and about geographic information science, a system that has displaying the different forms of geographically referenced developed considerably and is involved in our lives more information” [3]. All types of geographically references data than ever. The fundamental areas of geographic information can be organized by The Geographic Information Systems. Today, the major components of GISs are people, hardware, Copyright (c) IARIA, 2014. ISBN: 978-1-61208-326-1 129 GEOProcessing 2014 : The Sixth International Conference on Advanced Geographic Information Systems, Applications, and Services software, data procedures, and the network [3]. A GIS allows provides analytical results for a much wider audience than us to understand all types of reports, data, and visualize, the traditional GIS. People start to search online and use interpret, and find relationships between them. A GIS helps free search and query analysis for spatial objects without people answer questions and solve problems by looking for purchasing expensive GIS software. In the processing field, data in a way that is quickly understood and easily shared. the Internet enhances the reusability and accessibility of the GIS technology is used by any kind of work which can be analysis tools and dynamic download and upload, which integrated easily with GIS. Spatial analysis is mainly used in also helps interactive work on data, which is discussed later many areas; thus, with the help of the GIS, analyzing data in this current study. and finding results in different domains is easy, a key Accessing data over the Internet was the first step for the element of the GIS. Internet GIS [2]. Accessing data online allows people who General benefits of using the Geographic Information Systems include saving money, increasing efficiency, aiding have stand-alone GIS on their local machines to transfer in making better decisions, improving communication, data over the Internet. This method is suitable for accessing keeping records better and deleting the managing data data quickly and easily but harder for the analyzing data geographically or the relations [4]. Different types of data independent from the location, which is the next important management and different types of software deal with step. Online GIS processing continues to improve to different types of data. However, these details are beyond the increase the analytical abilities of the Internet. scope of this paper. In many open source and commercial programs, the usage is based on the work someone wants to IV. DATA CENTRALIZED- DISTRIBUTED GIS do exactly, which means the selection changes with the The GIS influenced the advancement of information context of the work. Only basically say that the data types technology. The development of the GIS resembles include different raster, vector and hybrid format[3]. The computer development, which evolved from a mainframe data sources include images, digitized or scanned maps, GPS GIS to a desktop GIS [2] and then distributed GIS, which data, and data transferred from other places with the required includes Internet GIS and mobile GIS. program. Distributed GIS has subtypes which are Local Area What is unclear about the GISs are whether; systems are Network (LAN) based GIS, Internet based GIS and mobile inter-disciplinary or a separate discipline. According to based GIS. In this paper we are interested with the some, the GISs are inter-disciplinary; others believe since the system has been developed, it is a separate discipline. Since distributed GIS refers to GIS programs working on the this issue does not affect the capability or development of the internet (Internet GIS) or wireless network environments GIS, this issue is not important in this paper. This paper (mobile GIS)[2].Distributed GIS is mainly based on focuses on GIS capabilities and how the GISs have affected improving the Internet and wireless technologies based on daily life since being developed in the 1990s. the rapid expansion of low-cost bandwidth [2] over the Now looking at some little information on how GIS is Internet, and web-enabled desktop and mobile devices. developed at first. The GIS was first developed in Canada in The distributed GISs differentiate the client-server LAN- the mid-1960s to identify land resources, where they were, based traditional method [2], which does not require the and how they were used. In the late 1970s, Harvard installation of a GIS program on the user’s desktop. This University's Laboratory for Computer Graphics and Spatial method relies on the access to analytical tools and data Analysis developed a general purpose GIS [1][5]. In the anywhere through Internet access or wireless coverage. The early 1980s, the price of computing hardware decreased, client is any device that can be connected to the Internet or which helped sustain the software industry and led to the may be connected to a wireless capable device to access the development of cost-effective applications. This is making data or tool. There are two concepts in distributed GIS: the more powerful and efficient standalone systems which Internet GIS [2] (can be wired or wireless also) and mobile have been introduced in the 1980’s. During the 1990s, map GIS (wireless). This is important because depending on analysis and modeling start to increase this software whether communications are wired or wireless, the programs. After the 1990s, the Internet grew rapidly, which applications may change. Although these issues are very led to new concepts: distributed GIS and Internet GIS [2]. important for developing a GIS, the interoperability of the data is very important. III. EFFECT OF THE INTERNET ON THE GEOGRAPHIC INFORMATION SYSTEMS V. DECENTRALIZED DISTRIBUTED GIS The Internet grew rapidly in the 1990s, and has become In distributed GISs, many names are used: online GIS, part of society. Ubiquitous access to the Internet makes it distributed geographic information (DGI), web-based GIS, more powerful for people to process, exchange, and access or web GIS [2][6]. Internet GIS and web GIS sound as if information.
Recommended publications
  • URP 6276) Web
    URP 6276 Internet Geographic Information Systems Fall 2014 Instructor: Zhong-Ren Peng, Ph.D. (Architecture building, Room 462, phone 352-291-1491, e-mail: [email protected]) Teaching Assistant: Xinyu Fu ([email protected]) Prerequisite: URP 6270 or by consent with Instructor Required Textbook: Zhong-Ren Peng and Ming-Hsiang Tsou, 2003, Internet GIS: Distributed Geographic Information Services for the Internet and Wireless Networks, New York: John Wiley & Sons. Course Overview This course focuses on the advanced topic in geographic information systems (GIS): Internet GIS. Internet GIS is a network-centric GIS technology that uses the Internet and the World Wide Web as a primary means of providing access to the functionality (i.e., analysis tools, mapping capability) of GIS and to the spatial data and other data needed for various GIS applications. It provides users capability to work interactively with maps and conduct spatial analysis on the Web. It has many applications in urban planning, e-government and e-business. There are two goals of the course. The first one is to offer you theoretic background so that you will have a better understanding of the concepts of Internet GIS, such as how Internet GIS works, the different architecture models, and the state of art of the Internet GIS technology. The second goal is to offer you hands-on experience to use Internet GIS programs so that you can gain necessary skills to work with Internet GIS programs. The course will start with an introduction to networking basics and the evolution of software architecture, specifically the client/server model.
    [Show full text]
  • Geospatial Web Application Development to Access Irrigation Asset Data: Veterans Affairs Palo Alto Health Care System
    Geospatial Web Application Development to Access Irrigation Asset Data: Veterans Affairs Palo Alto Health Care System by Megan Theresa Gosch A Thesis Presented to the Faculty of the USC Graduate School University of Southern California In Partial Fulfillment of the Requirements for the Degree Master of Science (Geographic Information Science and Technology) May 2016 Copyright ® 2016 by Megan Theresa Gosch DEDICATION To my mom, Carolyn Ann Eriksson, for everything. Gone too soon but forever in our hearts. ii ACKNOWLEDGMENTS I would like to thank my family for their continued support throughout my graduate coursework and thesis writing. Knowing the time you have allowed me to pursue my dream of finishing my master’s degree resulted in time not spent with you all. I hope for my three boys that you can now see that going to school when you are passionate about something is worth all the hard work. Thank you to all my teachers at USC, but especially Dr. Darren Ruddell my thesis chair, and my committee members Dr. Jennifer Swift and Dr. Robert Vos. You made this process a whole lot easier with your continued support and guidance. To Steve McGrath, Supervisory Engineer of the Veterans Affairs Palo Alto Health Care System, who supported this project throughout the entire process. Thank you also to Joanna Fong for her continued assistance and feedback. Last, but not least, to my husband Dave. Your love and encouragement are a continual inspiration to me. iii Table of Contents Dedication ......................................................................................................................................
    [Show full text]
  • Interactive Topographic Web Mapping Using Scalable Vector Graphics
    University of Nebraska at Omaha DigitalCommons@UNO Student Work 12-1-2003 Interactive topographic web mapping using scalable vector graphics Peter Pavlicko University of Nebraska at Omaha Follow this and additional works at: https://digitalcommons.unomaha.edu/studentwork Recommended Citation Pavlicko, Peter, "Interactive topographic web mapping using scalable vector graphics" (2003). Student Work. 589. https://digitalcommons.unomaha.edu/studentwork/589 This Thesis is brought to you for free and open access by DigitalCommons@UNO. It has been accepted for inclusion in Student Work by an authorized administrator of DigitalCommons@UNO. For more information, please contact [email protected]. INTERACTIVE TOPOGRAPHIC WEB MAPPING USING SCALABLE VECTOR GRAPHICS A Thesis Presented to the Department of Geography-Geology and the Faculty of the Graduate College University of Nebraska in Partial Fulfillment of the Requirements for the Degree Master of Arts University of Nebraska at Omaha by Peter Pavlicko December, 2003 UMI Number: EP73227 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. Dissertation WWisMng UMI EP73227 Published by ProQuest LLC (2015). Copyright in the Dissertation held by the Author. Microform Edition © ProQuest LLC. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code ProQuest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 THESIS ACCEPTANCE Acceptance for the faculty of the Graduate College, University of Nebraska, in Partial fulfillment of the requirements for the degree Master of Arts University of Nebraska Omaha Committee ----------- Uf.A [JL___ Chairperson.
    [Show full text]
  • Evolution of Grid-GIS Systems
    International Journal of Computer Science and Telecommunications [Volume 3, Issue 3, March 2012] 36 Evolution of Grid-GIS Systems ISSN 2047-3338 Hari Singh 1 and Seema Bawa 2 1N.C. College of Engineering, Panipat, Haryana, India 2Thapar University, Patiala, Punjab, India [email protected], [email protected] Abstract — Grid is the collection of heterogeneous resources, [14]. A philosophical and technical comparison between providing good opportunities for the users of virtual Legion and Globus is done [15]. Performance of Alchemi and organizations forming a Grid for coordinated resource sharing Globus is compared [10]. Similarities and differences between and problem sharing. Much Grid middleware software exists for Grid computing and such distributed computing systems as implementing a Grid framework. Apart from many application P2P, areas of Grid Computing, Geographic Information System has CORBA, Cluster Com puting, and DCE are explained [2]. been an emerging application area for Grid Technology in recent time. In this paper, the developments in the field of Grid-GIS are With the help of Grid middleware sharing of all kinds of discussed after a brief overview of Grid Computing and GIS resources, including data resources, computing resources, separately. Some observations are also discussed in the storage resources, information resources, knowledge concluding section of the paper. resources, etc. has become possible. This paper describes the evolution of Grid-GIS systems. Index Terms — Grid Computing, GIS, Web-GIS and Grid-GIS Section II describes the Grid Computing Technology and the underlying architecture. Section III describes the Geographic Information System (GIS), accessing data from GIS databases, I. INTRODUCTION problems of GIS databases such as heterogeneity and interoperability, and spatial data handling language, N earlier days when mainframe computers were used for Geographic Markup Language (GML).
    [Show full text]
  • Recent Trends in Internet / Web GIS and Mobile GIS for Disaster Management Dr.G
    SSRG International Journal of Geo informatics and Geological Science ( SSRG – IJGGS ) – Volume 3 Issue 1 Jan to April 2016 Recent Trends in Internet / Web GIS and Mobile GIS for Disaster Management Dr.G. Anil Kumar Sr. Asst Prof CSE MGIT JNTU H TS India Abstract Internet / Intranet and mobile communication Geographical Information System (GIS) is a network. tool which now finds applications in almost all fields of engineering, science, geography, planning and II. INTERNET GIS decision making, importantly pertaining to Disaster Internet is a collection of interconnected Management and Natural Hazards like earthquake, network of computing machines worldwide, Where floods, cyclones, avalanche, landslide, tsunami, networks operate using a standard set of addresses drought, forest fire etc. As GIS technology is allowing millions of computers connectivity on a changing at a very fast rate, moving rapidly from global scale. Internet based World Wide Web mainframes to desktops and finally to palm top (WWW) has emerged as an alternative means of systems, coupled with advancement in broad band accessing, viewing, and distributed spatial communication technology has provided a new information. In Internet GIS, results are achieved by dimension to GIS analyst. In this paper we want to integrating front end query capabilities supported present the framework of advances and future trends through standard Internet and WWW interfaces, and of Internet GIS which will be very significant for protocols with the capabilities of a commercial Natural Hazards and Disaster Management in terms DBMS (Database Management Systems) and GIS of accuracy and speed of processing and software residing in the background. User defined communication using satellite data.
    [Show full text]
  • Scalable and Extensible Infrastructures for Distributing Interoperable Geographic Information Services on the Internet By
    Scalable and Extensible Infrastructures for Distributing Interoperable Geographic Information Services on the Internet by NADINE S. ALAMEH B.E., Computer and Communication Engineering, American University of Beirut (1994) M.S., Civil and Environmental Engineering, Massachusetts Institute of Technology (1997) M.C.P., Urban Studies and Planning, Massachusetts Institute of Technology (1997) Submitted to the Department of Civil and Environmental Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computer and Information Systems Engineering at the ENG MASSACHUSETTS INSTITUTE OF TECHNOLOGY MASSACHUSETTS INSTITUTE OF TECHNOLOGY February 2001 FEB 2 2 2001 @ Nadine Alameh, 2001. All Rights Reserved. LIBRARIES The author hereby grants to MIT permission to reproduce and distribute publicly paper ana efe= tronic copies of this document in whole or in part, and to grants others the right to do so. Author ................... .......- , . .. ..., t . .. ........................... Department of Civiand Environmental Engineering January 19, 2001 C ertified by ........................................... 7 .,-a Ferreira Professor of Urban Planning and Operations Research Thesis Supervisor ii -.- I C ertified b y ...................................... .... .,.................................................... S John Williams Professor Civil and Environmental Engineering Thesis Reader Accepted by I. "."................... Oral Buyukozturk Chairman, Departmental Committee on Graduate Students Scalable and Extensible
    [Show full text]
  • Geoportals and Geocollaborative Portals: Functionality and Impacts on Travellers' Trip Panning and Decision Making Processes Marianna Sigala [email protected]
    University of Massachusetts Amherst ScholarWorks@UMass Amherst International CHRIE Conference-Refereed Track 2009 ICHRIE Conference Jul 31st, 3:00 PM - 4:00 PM Geoportals and Geocollaborative Portals: Functionality and Impacts on Travellers' Trip Panning and Decision Making Processes Marianna Sigala [email protected] Sigala, Marianna, "Geoportals and Geocollaborative Portals: Functionality and Impacts on Travellers' Trip Panning and Decision Making Processes" (2009). International CHRIE Conference-Refereed Track. 28. https://scholarworks.umass.edu/refereed/Sessions/Friday/28 This Conceptual Refereed Paper is brought to you for free and open access by the Hospitality & Tourism Management at ScholarWorks@UMass Amherst. It has been accepted for inclusion in International CHRIE Conference-Refereed Track by an authorized editor of ScholarWorks@UMass Amherst. For more information, please contact [email protected]. GEOPORTALS AND GEOCOLLABORATIVESigala: Geoportals and Geocollaborative PORTALS: Portals and FUNCTIONALITY Trip Planning Process AND IMPACTS ON TRAVELLERS’ TRIP PLANNING AND DECISION MAKING PROCESSES Marianna Sigala University of the Aegean Chios, Chios Island, Greece ABSTRACT As more and more travelers wish to create their personalised trip itineraries, the provision of geographical information and services is an unavoidable necessity for travel websites. The current evolution of geoportals and geocollaborative portals present numerous opportunities for making the trip planning process less complex and time consuming, more efficient, social, collaborative and enjoyable for travelers and their travel companions. This paper aimed to analyse the functionality and services of geoportals and geocollaborative portals and to thoroughly demonstrate their impacts on the trip planning and decision making processes on travelers. The discussion provides practical guidelines for designing geoportals and/or geocollaborative portals and directing future research.
    [Show full text]
  • Integrating AJAX Approach Into GIS Visualization Web Services
    Integrating AJAX Approach into GIS Visualization Web Services Ahmet Sayar1, 2, *, Marlon Pierce1 and Geoffrey Fox 1, 2, 3, 4 1 Community Grids Lab, Indiana University, Bloomington, Indiana, 47404, USA 2Department of Computer Science, Indiana University 3Department of Physics, Indiana University 4School of Informatics, Indiana University {asayar, mpierce, gcf}@cs.indiana.edu Abstract XML and HTTP as AJAX does. Since AJAX and Web Services are XML based structures they are able to As the Web platform continues to mature, we see an leverage each others strength. increasing number of amazing technologies that take Geographic Information Systems (GIS) visualization In this paper, we first give some background applications to new levels of power and usability. By information about the web technologies we have been integrating new powerful technologies into GIS using in our proposed architecture. These are basically systems, we get higher performance results with AJAX, Web Services, and GIS Web Services. In additional functionalities. The most recent Section 3 we mention some related works about the development capturing the attention of the browser AJAX and Web Services. In Section 4 we first give a based application developers is AJAX (Asynchronous generic architecture for integration of any Web JavaScript and XML). In this paper we present a Services and AJAX. Then, we give sample usage generic and performance efficient framework for scenarios to prove our integration concepts; one of integrating AJAX models into the browser based GIS them is for Google and GIS Data Server (WFS) Visualization Web Services systems. integration and the other one is for Google and GIS Mapping Server (WMS) integration.
    [Show full text]
  • Web Services a Standards-Based Framework for Integration
    Web Services A Standards-Based Framework for Integration Web services are software components that can Web Services Web services standards are the glue that allows be accessed over the Web through standards- computers and devices to interact. UDDI based protocols such as HTTP or SMTP for use in allows clients to discover Web services. other applications. They provide a fundamentally new framework and set of standards for a UDDI Registry 1. Publish computing environment that can include servers, 2 1 2. Search workstations, desktop clients, and lightweight 3. Discover “pervasive” clients such as phones and PDAs. 3 4. Consume Web services are not limited to the Internet; they supply a powerful architecture for all types of distributed computing. Web ArcWeb Web services standards are the glue that Applications Services allows computers and devices to interact, forming 4 a greater computing whole that can be accessed from any device on the network. UDDI allows clients to discover Web services. infrastructure through interoperability based on In Web services, computing nodes have three In a GIS context, the UDDI node plays the role of standardized interfaces. ESRI has built OGC- roles—client, service, and broker. a metadata server for registered Web services. A compliant connectors for ArcIMS that support n A client is any computer that accesses user can search the UDDI directory and locate the access to Web Map Services (WMS) and Web functions from one or more other computing distributed service providers or services that exist Feature Services (WFS). nodes on the network. Typical clients on a network. Web services can use a geographic framework include desktop computers, Web browsers, Web services interoperate (i.e., communicate) to fuse GIS applications.
    [Show full text]
  • 11. Distributed GIS Geographic Information Systems and Science SECOND EDITION Paul A
    11. Distributed GIS Geographic Information Systems and Science SECOND EDITION Paul A. Longley, Michael F. Goodchild, David J. Maguire, David W. Rhind © 2005 John Wiley and Sons, Ltd Outline Introduction Distributing the data The mobile user Distributing the software: GIServices © 2005 John Wiley & Sons, Ltd Distributing a GIS The component parts can be at different locations The user The data The software The network links all of the parts together © 2005 John Wiley & Sons, Ltd The Subject Location Also important to GIS is the area that is the subject of the GIS project In principle a subject area can be studied by a GIS user located anywhere on the Earth's surface The power of GIS is greatly enhanced when the user is located in the subject location • Information from the database can then be combined with information from the user's senses © 2005 John Wiley & Sons, Ltd The Role of Standards Distributed GIS relies on the adoption of common standards To allow the various components to operate together Such standards have been developed by various national and international bodies, aided by the Open Geospatial Consortium © 2005 John Wiley & Sons, Ltd Distributing the Data It must be possible to find remotely located data Data documentation, or metadata, provides the key to successful search The U.S. Federal Geographic Data Committee devised a much-emulated standard for geographic data description • The Content Standard for Digital Geospatial Metadata © 2005 John Wiley & Sons, Ltd Major Features of FGDC Metadata 1. Identification Information: basic 6. Distribution Information: information about the data set information about the distributor of 2.
    [Show full text]
  • Spatial Data Studio Ltom.02.011 Interoperabilty & Webgis
    SPATIAL DATA STUDIO LTOM.02.011 INTEROPERABILTY & WEBGIS Alexander Kmoch DATA INTEROPERABILITY • Introduction & Motivation • Service Orientied Architecture • Spatial Data Infrastructure • Open Geospatial Consortium INTRODUCTION & MOTIVATION ● Spatial Information and its role in taking informed decision making ● Spatial data transfer ● Web services ● Open GIS vs. Open Source The Network is the Computer (* (* John Gage, 1984 SPATIAL INFORMATION AND TECHNOLOGIES SPATIAL DATA TRANSFER: FROM CLASSIC PAPER MAPS TO WEB SERVICES Web Services Online download (FTP) Offline copy (CD/DVD) Print Copy (paper maps) Source: Fu and Sun, 2011 WEB SERVICES ● “A Web Service is a software system designed to support interoperable machine-to-machine interaction over a network” (W3C, 2004) ● Interface to application functionality accessible through a network ● Intermediary between data/applications and users WEB SERVICES FUNCTIONALITY Web Client File data Send Request Desktop Client Send response Mobile Client geodatabase FUNCTIONALITIES OF THE GEOSPATIAL WEB SERVICES ● Map services: display an image of the spatial data, but not the raw data ● Data services: ● Editing services: create, retrieve, update and delete the geo-data online; e.g. OSM mapping capabilities ● Search services: INSPIRE Geoportal ● Analytical services ● Geocoding services: transforming the addresses into X,Y coordinates ● Network analysis services: e.g. finding the shortest path/route between two locations: A and B ● Geoprocessing services: mapping the crime hotspots using a GIS tool that
    [Show full text]
  • A Distributed GIS for Monitoring and Modeling Urban Metabolism
    Distributed GIS for Monitoring and Modeling Urban Air Quality * by Chen-Hsiang Yeang, Joseph Ferreira, Jr., and Ayman Ismail Massachusetts Institute of Technology Abstract: The progress of technology has made the measurement of air quality and the simulation of complex air pollution models both feasible and cost-effective. However, there is a long way to go in terms of facilitating widespread access to the data and models, and linking the monitoring of trace gases with specific urban activities and land use that might be controllable. As part of a NASA-funded project, we are working with scientists and engineers to design and test a distributed GIS infrastructure for studying such "urban respiration" phenomena. Measurements of trace gases within a metropolitan area (from mobile and fixed instruments) are geo-referenced, time-stamped, and stored in a relational database server (Oracle). GIS services (using ArcInfo and ArcView) are connected to the database so that subsets of the trace gas measurements can be extracted and converted on-the-fly into GIS data layers. These subsets (by location, date, and time-of-day) can be displayed and cross-referenced with other layers such as weather conditions, land use and cover, topography, hydrography, demography, and congestion levels of road networks. A web-based interface (using ArcView Internet Map Server) allows research team members at different locations to query, visualize, and process the cross-referenced data layers in order to generate surface level estimates of initial conditions for use in the air quality models. Keywords: distributed GIS, Web GIS, air quality, urban modeling, database management * Published in the Proceedings of the 6th International Conference in Urban Planning and Urban Management, September, 1999, Venice, Italy; and, subsequently, in Italian, in the Journal, URBANISTICA, n.114, October, 2000.
    [Show full text]