Sunday, 17 November 2002 - 8:20 AM

This presentation is part of : Contour Mapping and Interpretation of Spatial Insect Counts

Implicit assumptions in contour mapping of spatial insect counts

Christian Nansen, Department of Entomology, Oklahoma State University, Department of Entomology, Noble research center 127, Stillwater, OK

Contour maps are widely used to visualize spatial insect counts. A contour map is based on interpolation of counts at georeferenced locations, and it is implicitly assumed that similarity of counts at these locations is negatively correlated with the geographical distance between locations. Hence, contour mapping of insect counts is only meaningful if it has been established that insect counts at sampling locations are spatially auto-correlated. This presentation describes the use of variogram analysis as an analytical tool for testing for spatial auto-correlation, and the suitability of different data sets for contour mapping is discussed.

Species 1: Coleoptera Dermestidae Trogoderma variabile (Warehouse beetle)
Species 2: Lepidoptera Pyralidae Plodia interpunctella (Indian meal moth)
Keywords: Interpolation, Contour mapping

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