Digital Earth is a visionary concept and outlines a charming prospect for the public. This paper starts from the concept and technologies of Digital Earth and analyzes the architecture of geo-spatial information services of Digital Earth according to the developing trend of requirements for geo-spatial information services. As a promising prospect for Digital Earth, VisionCruiser is introduced ...

Geo-collaboration appears when individuals or groups of individuals work together to solve spatial decision-making problems facilitated by geospatial information technologies. In this paper we focus on current developments in geo-collaboration where we take an example of public participatory geoinformation systems (PP GIS). This research field focuses on the issues related to the participation ...

Spatial dependency and spatial embedding are basic physical properties of many phenomena modeled by networks. The most indicated computational environment to deal with spatial information is to use Georeferenced Information System (GIS) and Geographical Database Management Systems (GDBMS). Several models have been proposed in this direction, however there is a gap in the literature in generic f...

Knowledge discovery in databases is a process that aims at the discovery of associations within data sets. The analysis of geo-referenced data demands a particular approach in this process. This chapter presents a new approach to the process of knowledge discovery, in which qualitative geographic identifiers give the positional aspects of geographic data. Those identifiers are manipulated using...

The widespread proliferation of location-acquisition techniques and GPS -embedded mobile devices resulted in the generation of geo-tagged data at unprecedented scale and have essentially enhanced the user experience in locationbased services associated with social networks. Such locationbased social networks allow people to record and share their location and are a rich source of information wh...

BACKGROUND The Global Programme to Eliminate Lymphatic Filariasis (GPELF) depends upon Mass Drug Administration (MDA) to interrupt transmission. Therefore, delimitation of transmission risk areas is an important step, and hence we attempted to define a geo-environmental risk model (GERM) for determining the areas of potential transmission of lymphatic filariasis. METHODS A range of geo-enviro...

As stated in literature by several authors, there has been literally big-bang explosion in data acquired in recent times. This is especially so about the geographical or geospatial data. The huge volume of data acquired in different formats, structured, unstructured ways, having large complexity and non-stop generation of these data have posed an insurmountable challenge in scientific and busin...

Direction relations, as an important spatial relationship, is simply expressed as object prosperity in traditional geo-ontology. The lacking of explicit specifications and reasoning rules of direction relations in geo-ontology result in the difficult or inflexible of spatial reasoning. Also, digital gazetteers provide information on named features, linking the feature's name with its location a...

These tables report the results of analyses conducted by staff of the Special Population Surveys Branch of the Division of Health Interview Statistics, National Center for Health Statistics. All estimates are subject to sampling variability, as well as survey design flaws, respondent classification and reporting errors, and data processing mistakes.

................................................................................................... 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 ...................