@inbook {Hiemstra2007IG,
	title = {{Toward an automatic real-time mapping system for radiation hazards}},
	booktitle = {GI-Days conference},
	year = {2007},
	pages = {6},
	publisher = {Institut f{\"u}r Geoinformatik},
	organization = {Institut f{\"u}r Geoinformatik},
	address = {M{\"u}nster, Germany},
	author = {Hiemstra, P.~H. and Pebesma, E.~J. and Twenh{\"o}fel, C.~J.~W. and Heuvelink, G.~B.~M.},
	editor = {Klien, E.}
}