Many geospatial models are developed using command line modules of GIS packages. To utilize scientific workflow technology in geospatial modeling, it is important to support command line GIS modules in scientific workflow systems. However, straightforward representation of command line modules as workflow components conflicts with conventional conceptual design patterns. We propose a two-step g...

National geologic map databases are presently being constructed in the U.S. and Canada, as well as in several other countries. Here, we describe an object-based model for geologic map information, specifically designed to represent digital geologic maps and related geoscientific information. Although oriented to geoscience, several fundamental issues in representing geospatial information are e...

In general, geospatial data can be divided into two formats, raster and vector formats. A raster consists of a matrix of cells where each cell contains a value representing quantitative information, such as temperature, vegetation intensity, land use/cover, elevation, etc. A vector data consists of points, lines and polygons representing location or distance or area of landscape features in gra...

Facilitating an interoperable application environment based on heterogeneous georesources is one of the ultimate goals for a spatial data infrastructure (SDI). As the sharing of geospatial data becomes increasingly easy and convenient, the discrepancy and heterogeneity of data quality between datasets dynamically collected from various georesources must be taken into consideration. Such awarene...

Aggregation and visualization of geographical data are an important part of environmental data mining, environmental modelling, and agricultural management. However, it is difficult to aggregate geospatial data of the various formats, such as maps, census and survey data. This paper presents a framework named PlaniSphere, which can aggregate the various geospatial datasets, and synthesizes raw ...

User-contributed content represents a valuable information source provided one can make sense of the large amounts of unstructured data. This work focusses on geospatial content and specifically on travelblogs. Users writing stories about their trips and related experiences effectively provide geospatial information albeit in narrative form. Identifying this geospatial aspect of the texts by me...

Generating and visualizing rich and interactive (geospatial) 3D contents over the World Wide Web (WWW) using state of the art web technologies such as WebGL as a native component of modern web browsers is a continuously growing approach to modern geospatial data exploitation. In this paper we are introducing OpenWebGlobe and 3DCityTV as two showcase applications to demonstrate the capabilities ...

Current mapping and related geospatial technologies are not designed to support group work and we have a limited theoretical or practical basis from which to extend (or reinvent) technologies for group use of geospatial information. To address the challenge of supporting group work with geospatial information, we have developed a comprehensive conceptual approach to geocollaboration and are app...

One of the practical issues in clustering is the specification of the appropriate number of clusters, which is not obvious when analyzing geospatial datasets, partly because they are huge (both in size and spatial extent) and high dimensional. In this paper we present a computationally efficient model-based split and merge clustering algorithm that incrementally finds model parameters and the n...

This paper considers the problems of sensor data publication, taking advantage of research on components and Web service standards. Sensor data is widely used in scientific experiments – e.g., for model validation, environment monitoring, and calibrating running applications. Heterogeneity in sensing devices hamper effective use of their data, requiring new solutions for publication mechanisms....