Querying and analyzing large volumes of spatially oriented scientific data becomes increasingly important for many applications. For example, analyzing high-resolution digital pathology images through computer algorithms provides rich spatially derived information of micro-anatomic objects of human tissues. The spatial oriented information and queries at both cellular and sub-cellular scales sh...

Advances in geographic information system (GIS) technology, developed by geographers, provide new opportunities for environmental epidemiologists to study associations between environmental exposures and the spatial distribution of disease. A GIS is a powerful computer mapping and analysis technology capable of integrating large quantities of geographic (spatial) data as well as linking geograp...

An increasing number of institutions are challenged with implementing robust geographic information system (GIS) capabilities for a large number of individuals through informationsharing and interconnected networks. In the past, numerous technological roadblocks hampered the successful implementation of enterprise GIS (EGIS). With the advent of high-speed networks; increasingly fast computers; ...

This work presents a panorama of GIS integration in Spatial Statistics environments. It highlights the current needs of communities considering such integration. Spatial Statistics is treated in a context focused on the use of computational tools. A review of types of integration is accomplished and a new approach is proposed integrating the statistical software R and the GIS library TerraLib.

This paper presents two spatial query methods for a Geographic Information System (GIS) that runs on a touch screen. On conventional GIS interfaces SQL is used to construct spatial queries. However keyboard typing proves to be inefficient on touch screens. Furthermore, SQL is not an easy-learning language, especially for novices to GIS. To simplify query construction, firstly we have designed a...

“Qualitative GIS – isn’t that kind of an oxymoron?” This comment from a colleague with years of experience working with GIS echoes the title of an editorial from an edition of Environment and Planning dedicated to the topic (Kwan and Knigge: 2006), and voices lingering concerns about the limitations of GIS. Qualitative GIS: A Mixed Methods Approach serves as an invitation to scholars in fields ...

Current GIS development pays more attention to the ability of distribution based on the client-server architecture. In a batch mode distributed GIS, a file server functions passively. Information sharing and integrating are far from concurrent, nor is the database integrity controlled. The dynamic Voronoi data model, equipped with a dedicated spatial server, presents a bright future in overcomi...

Numerous applications involve the use of a Geographical Information System (GIS). A working session consists of several spatial database orders. The scope of this paper is to provide a link between alphanumeric data and spatial representation of objects stored in a GIS database. The notions of Granule, Topology and Set_relationship are defined to guarantee a semantics to alphanumeric data parts...

With the recent developments in web-based GIS applications, the process of accessing, sharing, disseminating and analyzing data has changed. Web-based GIS uses the Internet to access and transmit data and the analysis tools to enhance the visualization and integration of spatial data. Multimedia GIS also allows the users to access a wide range of multimedia data. Integration of webbased GIS and...

The strength of a geographic information system (GIS) is in providing a rich data infrastructure for combining disparate data in meaningful ways, by using a spatial arrangement (e.g., proximity). As a toolbox, a GIS allows planners to perform spatial anal ysis using geo-processing functions, such as map overlay, connectivity measurements, or thematic map coloring. Although this makes the geogra...