Tomislav Hengl

ISRIC, Wageningen University and Research, the Netherlands

Presentation title: Worldmaps: building global covariates for automated mapping

Tomislav Hengl is a senior research at the ISRIC World Soil Information institute, Wageningen University. Tom specializes in analysis of various environmental spatio-temporal data and develops automated tools for geo-processing large environmental datasets. He is currently involved with the Global Soil Mapping project (GlobalSoilMapping.org), which aims at building high resolution soil property maps of the world. Tom is also vice-chair of the international research society Geomorphometry and vice-chair of the IUSS Working Group on Digital Soil Mapping. He has edited a DEM data processing manual and an open access book on geostatistical mapping. He regularly organizes summer schools on spatial data analysis using FOSS for PhD students called GEOSTAT.

The presenter maintains a global repository of publicly accessible layers called “worldmaps”. This repository now consists of cca 100 unique layers, which can potentially be used to improve geostatistical mapping of any environmental variable. He will discuss the role of the worldmaps repository for automated mapping applications going from mapping of species distribution to spatio-temporal interpolation of meteorological variables. Such multi-thematic repository could be used to improve the existing intamap package by extending the automated interpolation algorithms to regression-kriging based methods. Here a list of methodological issues need to be solved: how to select optimal subset of covariates, which regression model to use, how to reduce multicolinearity and how to match spatial and temporal resolution of the gridded data. His presentation will include a number of case studies demonstrating geostatistical mapping using open source software tools (R+OSGeo) and publicly available covariates.