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Water temperature variation  can have a significant impact on freshwater aquatic communities.  Elevated temperatures can lead to differences in predator/prey relationships and mortality in relatively non-mobile classes of aquatic species such as mussels.  Using native 64-bit GRASS 6.5 on 64-bit Centos Linux, a previously generated 18.2 m (60 foot) forest canopy height grid for the State of North Carolina ( 17237 Rows and 45102 columns )  was used as a base elevation layer...

Landscape regionalization is a frequently encountered need in the geographical sciences, having applications ranging from sampling design to conservation prioritization. One technique for partitioning the landscape is to use cluster analysis of GIS layers describing the area under study. Here I present a GIS technique that uses partitioning around medoids as its clustering algorithm. Partitioning around medoids (PAM) is a non-hierarchical clustering algorithm that is related to the commonly-...

Spatial patterns and properties of species richness in natural communities are of keen interest to biogeographers and conservation biologists as they describe key features of the location and distribution of the earth's biological diversity. Patterns of species richness are determined by constituent species range sizes, spatial locations of those ranges, species associations, co-occurrence and species interactions.   Analysis of these phenomena at biogeographical scales,  i.e...

Numerical models, such as hydrodynamic and climate models, produce output with a large number of variables and a large number of grid cells and time steps. Further use of the resulting data products has been challenging, especially for further use outside the institute of origin. Due to the vastness of the data, simply downloading copies of data is impossible. Web services are therefore used to access subsets of the data. The most mature candidates for working with gridded data are...

This paper discusses advances in the development of a software environment with capabilities for accessing, utilising and incorporating geospatial data and processes into the scientific workflows of researchers interested in incorporating earth observation and geospatial analysis into their work. In previous work [McFerren et. al. 2010], we introduced the concept of geospatially-enabled scientific workflows; this paper shares progress made, insights gained and future research avenues exposed...