A Comparative Study of the Influence of Different Resolution Dtms on the Geomorphometric Parameters of Volcanic Scoria Cones

Abstract

Since the early 2000s, with the appearance of better and better resolution digital terrain models, they have been increasingly used as input data in various geomorphometric studies. They are excellent for studying large areas, clusters, geomorphological forms, and with the help of them it is not difficult to analyse hundreds of forms. A common problem in statistical evaluation of DTMs is that the results may depend on the resolution of the input data. My aim in this study was to examine one of the simplest volcanic forms, the cinder cones, from a geomorphometric point of view, and to show what extent are the result affected by the different resolution os the DTMs. The study areas were the San Francisco Volcanic Field (DTM resolutions 30 and 10 m) in Arizona (USA) and Chaîne des Puys (resolutions 90 and 0.5 m) in Auvergne (France). Polarcoordinate - transformation (PCT) were used, descriptive parameters were calculated and a comparison was carried out (with the help of the Mann-Whitney test) to show statistically significant differences for age groups and differences in values derived from different resolutions.