Introduction
The main objectives of this study are i) to learn how to use ArcGis‟s GeoStatistical Analyst to examine spatial structure and to interpolate surfaces using GeoStatistical techniques, and ii) to explore GeoStatistical technique using S-Plus (variograms, trend removal, Universal Kriging). The data available for this study include a GeoDatabase that contains a random spot heights feature class for an area in the northwest of the City of Calgary and the City Limits for the City of Calgary. Additionally, a 25m Digital Elevation Model (DEM) for the same area is also included. In this study, we are interpolating the random spot heights surface so as to predict the elevation of the surrounding areas. The software packages used for interpolation are ArcGis and S-Plus. ArcGis is used for Ordinary Kriging interpolation and S-Plus for Universal Kriging. This study aims at evaluating the results performed by two software packages. It also highlights the strengths and weakness of the software packages used for the analysis. This study includes many maps, figures, tables and command lines created in Arcgis and S-Plus; however, the end product of this study is to match the Ordinary Kriging performed in ArcGis and Universal Kriging performed in S-Plus and to understand how different software packages perform the interpolation.
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