The visualization of business data in a geographic context supports the decision making process by showing how e.g. sales data relates to other data. Tasks like market penetration analysis can be “visually” tackled by combining enterprise and market ...

The paper demonstrates a new application of computer vision to digital image libraries for GIS the use of image texture for description of content. Our goal was to use a scheme that is able to automatically decide on the image features and based upon ...

This paper describes the process and tools used for creating a full resolution seamless Landsat mosaic of the continental U.S. at 30 meters per pixel. The 6-band, 150GB image was built from 428 individual Landsat scenes of the Multi-Resolution Land ...

We present several techniques for visualizing the temporal dimension of a Geographic Information System. Techniques include (i) pseudo-colored time-window display, (ii) side-by-side height bars, (iii) stacked time-aggregated cumulative bars, (iv) ...

We propose a new model for cartographic map coloring for use in Geographical Information Systems. Map coloring motivated the famous four-color problem in Mathematics. The published proofs of the four-color theorem yield impractical polynomial-time ...

Geographic Information Systems (GIS) have grown rapidly, motivated by general trends of information technologies in expanding their potential uses. In line with this tendency, GIS must consider the familiarity of new users with Cartography and their ...

We consider the problem of data dissemination in a sensor network. First we introduce a cost model for data dissemination in such networks. The model quantifies the tradeoff between the inconsistency of the data, and its transmission cost; the ...

Digital spatial data are underlying strong temporal changes. The typical approach of updating these changes is to check the data manually for their correctness by superimposing them on up-to-date orthophotos. The update cycles of large data sets are in ...

Dynamic 3D maps represent visual interfaces used to present and explore spatial and spatio-temporal data. They provide powerful design capabilities for map contents compared to current map toolkits and general-purpose 3D graphics systems. The underlying ...

This paper proposes the design of an extended DBMS as required for integrated management of urban transportation systems. We introduce an extended `lowest common denominator' database model that supports a wide and varied range of urban transport tasks, ...

This paper investigates the integration of a class of adaptive soft-computing techniques and architectures with helical hyperspatial codes (HHCode) - indexing technology developed at Canadian Hydrographic Services - and their use in developing automated ...

Efficient network query processing is extremely important in Geographical Information Systems (GIS) and Intelligent Transportation Systems (ITS) which include various applications of transportation, utility and communication networks, etc. In order to ...

Spatial applications frequently need to join two data sets based on some spatial relationship between objects in the two data sets. This operation, called a spatial join, is an expensive operation and in the past many algorithms have been proposed for ...

The goal of Digital Earth (www.digitalearth.gov) is to create a virtual representation of our planet that enables a person to explore and interact with the vast amounts of natural and cultural information gathered about the Earth. The challenge is ...

This paper presents the result of recent work on the use of geospatial repositories to store the conceptual content of object oriented application database schemas and dictionaries aligned with international standards in geographic information (ISO/TC ...

This paper proposes a prototype for integration and visualization of geo-referenced information (GRI) in a distributed environment in general and World Wide Web in particular. This prototype adopts a three-tier architecture and includes three main ...

Uncertainty management for geometric data is currently an important problem for (extensible) databases in general and for spatial databases, image databases, and GIS in particular. In these systems, spatial data are traditionally kept as determinate and ...

This paper proposes an extension of Ladkin's algebra on nonconvex intervals towards the spatial dimension. Based on the concepts of adverbs, we introduce an algebra that qualifies topological relationships between regions composed of simple regions. ...