Proceedings, XXth congress: Proceedings, XXth congress

Altan, M. Orhan

Bibliographic data

Multivolume work

Persistent identifier:: 1663674213

Title:: Proceedings, XXth congress

Sub title:: Istanbul, 12 - 23 July 2004

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1663674213

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.; Auch bezeichnet als XXth International Congress for Photogrammetry and Remote Sensing

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Document type:: Multivolume work

Volume

Persistent identifier:: 166368779X

Title:: Proceedings, XXth congress

Scope:: IV, 226 Seiten

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 166368779X

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(35,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: DEVELOPING A WEB-BASED GIS APPLICATION FOR EARTHQUAKE INFORMATION A. Garagon Dogru, T. Selcuk, H. Ozener, O. Gurkan, G. Toz

Document type:: Multivolume work

Structure type:: Chapter

DEVELOPING A WEB-BASED GIS APPLICATION FOR EARTHQUAKE INFORMATION A. Garagon Dogru* *, T. Selcuk 5, H. Ozener“, O. Gurkan* , G. Toz“ * BU, Kandilli Observatory and Earthquake Research Institute, Geodesy Department, Cengelkoy Istanbul, Turkey - (garagon, ozener, gurkano)@boun.edu.tr ® Turkish Land Forces Command, Ankara, Turkey - tselcuk@kkk.tsk.mil.tr “ITU, Civil Engineering Faculty, 34469 Maslak Istanbul, Turkey - tozg@itu.edu.tr YF (Youth Forum Session) KEY WORDS: Earthquakes, GIS, Internet/ Web, Retrieval, Programming, On-line, Web based ABSTRACT: The Internet has been changing the access and transmission of GIS data, applications and visualizations. Online GIS combines the advantages of both GIS and the Internet. Geographic information can be distributed in a variety of forms on the Internet. Moreover as the Internet technology takes progress, web-based GIS applications also change. This paper focuses on development and implementation of a web-based GIS application for earthquake information. In this study, a dynamic map browser type of web- mapping applications was designed for interacting with the earthquake information. This method provides users easy access to GIS data and basic functions on the Internet with low technological requirements. The user is not required to learn anything beyond the basics about how to interact with the system as well. In the study, a GIS application and a web site was developed to serve the system on the Internet. By integrating various data from different sources, this study aims to provide public users can access information about: earthquakes doing spatial and attribute query. Furthermore this model enables easy data management including maintenance and updating. 1. INTRODUCTION 1.1 Internet GIS Geographic Information Systems (GIS) are tools for acquiring, managing, analyzing, and presenting spatially related information (Coors, 1998). GIS convert diverse data into easy- to-read and easy-to-access maps and information. In addition, the advantages of the world wide web are numerous, the two primary being time independence and spatial independence (Mohler and Duff, 1999). Distributing data over the Internet is more efficient than transmitting data through disks. Both Internet and GIS changed the processes of accessing, sharing, disseminating and analyzing data. Technology to share GIS data, such as Web GIS, Open GIS and Distributed GIS on the Internet is rapidly progressing (Honda, 2003). 1.2 Approaches to Internet GIS Internet GIS includes any application that uses the Internet technology to make geographic data available. Geographic information can be distributed in a variety of forms on the Internet. There are several basic approaches to transmit geographic data (Garagon, 2002). The first is raw data download. If the user has GIS software capability, he/she will not request finished maps. After the data sets have been put on the user’s local disk, the GIS work is done off-line. Maps is the most common way of distributing geographic information. Maps may be static with a predesigned symbology or may be dynamic where the map itself or the viewing perspective of it can changed by the user, such as with a zoom-in/out feature for seeing a region of particular interest (Selcuk, 2001). Simple searches are also performed in a database according to a set of * Corresponding author. p g 145 criteria. These criterias can be either spatial or thematic. The records that match the criteria are then returned to the user, either in a map or a text report format. In another type of distribution, users can perform complex multi-theme queries, create buffers and customized maps, perform statistical spatial analysis, and so on. It allows users to create new data sets without altering the data. For designing web-based GIS applications, variety of programs and forms are available. But the web applications are based on the same model called client/server (Plewe, 1997) (Figure 1). The client makes a request to a server. The server processes the request and returns the information to the client. In this model, the process is shared between the client and the server, with different ratios. This sharing process is generated in various forms which have advantages and disadvantages. A thick client (interacting with a light server) provides powerful analysis. But it is hard to maintain the service. A thin client (interacting with heavy server) is limited with simple applications. However, it can be used by many people (Garagon, 2002). SERVER COMPUTER CLIENT COMPUTER Request INTERNET Response HTTP SERVER SOFTWARE WWW BROVW SER Figurel: Client-server model

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