DBPapers
DOI: 10.5593/sgem2011/s11.102

AUTOMATIC GENERATION OF DIGITAL ELEVATION MODELS USING PYTHON SCRIPTS

AUTHOR/S: Z. DOBESOVA
Monday 1 August 2011 by Libadmin2011

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 2, 599-604 pp

ABSTRACT

The ArcGIS software from ESRI contains tools for interpolation of raster surfaces from point data. There are four classical interpolation methods: IDW, spline with tension, regularized spline, and kriging in the “3D analysis” toolbox in the “Interpolation method” toolset in the ArcCatalog application. It is possible to set different parameter
values for each interpolation method in ArcGIS. These parameter settings influence the output digital elevation models. The research team in the Department of Geoinformatics, Palacký University in Olomouc, needed test datasets containing various DEMs for statistical evaluation. The aim of this research was to find suitable
interpolation methods and combinations of parameters for various types of georelief using the widely accessible interpolation methods in ArcGIS.

A new application called “DEM_Testing” for automatic creation of various digital elevation models was created in the Python language. The application consists of two Python scripts. The first script automatically creates DEMs, and the second creates
raster files with morphometric characteristics for all previously created test DEMs. These scripts have proven to be very helpful in the stage of creating test data. The purpose, functionality, structure, and use of these scripts are presented in this article.

Keywords: ArcGIS, geoprocessor, interpolation method, scripting, Python language

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