BACKGROUND An extensive West Nile virus surveillance program of dead birds, mosquitoes, horses, and human infection has been launched as a result of West Nile virus first being reported in Canada in 2001. Some desktop and web GIS have been applied to West Nile virus dead bird surveillance. There have been urgent needs for a comprehensive GIS services and real-time surveillance. RESULTS A pilo...

................................................................................................... 1 CHAPTER 1 – INTRODUCTION .................................................................... 3 CHAPTER 2 – AN INTRODUCTION TO GEO-INFORMATION SYSTEMS ... 7 2.1 What is a Geo-Information System? ......................................................... 7 2.2 Data found in a GIS ...................

Article history: Received 15 November 2005 Received in revised form 6 April 2006 Accepted 20 April 2006 Available online 11 July 2006 In this paper, a decision framework designed for spatially explicit value transfer was used to estimate ecosystem service flow values and to map results for three case studies representing a diversity of spatial scales and locations: 1) Massachusetts; 2) Maury Is...

This study, using different direct and indirect methodologies, evaluated the sedimentation rate in an artificial reservoir central Italy. is regionally representative was built 1960s for hydroelectric purposes; it has experienced a strong decrease trap efficiency loss of over 70% stored water volume. Direct measurements lake bottom bathymetry, carried out 2006 2015, 3D reconstructions performed...

Is GIS a tool or a science? The question is clearly important in the day-to-day operations of geography departments. Departments need to know if GIS is a tool that should be taught at the undergraduate level, or a science and thus a legitimate research specialty of faculty and graduate students. We summarize the debate on this question that was conducted on GIS-L electronic listserver in late 1...

This paper presents a methodology to develop synchronization code based on the global invariant (GI) approach in the context of the Uniied Process in UML. This approach has the following advantages: (1) it is a formal approach that enables formal veriication of programs being developed, (2) the most important activity in the programming process lies at a high level; namely, speciication of GIs,...

In recent years the use of geographic information systems (GIS) in healthcare has expanded rapidly. Although the use of GIS has increased quickly, very little consensus has been reached on which healthcare professionals are best suited to be trained in and use GIS. A moderate amount of research has addressed the use of GIS in healthcare, but very little research has addressed selecting and trai...

DEFINITION Network GIS Performance (NGP) refers to the level of Quality of Services (QoS) of a Network GIS. NGP includes both the efficient use of Network GIS resources (CPU, memory, massive storage, geospatial data and geospatial services) and the perception of speed of a Network GIS [1]. Network GIS is a GIS where the geospatial data and geospatial processing are distributed across a computer...

A global information system (GIS) connects companies in various countries. Although GIS professionals have produced many facilities for connectivity, only a few have developed a comprehensive GIS model to overcome the obstacles. Complexities, ambiguity as well as other risks are among GIS development difficulties. To develop an efficient and effective decision-making process, critical performan...

The popularity of Internet technology has brought about some fundamental changes in the field of GIS. Internet GIS is emerging as a new technology to access, process, and disseminate spatial information over the Internet. Internet GIS cover a much wider audience than the traditional GIS. This raises many issues that are distinct from traditional desktop GIS, such as easy access, webcompatible u...