Author Affiliations +
Maria Gritsevich,1,2 Göran Maconi,1 Anton Nolvi,1,3 Ivan Kassamakov,1 Antti Penttilä,1 Karri Muinonen,1,4 Edward Hæggström1
1Univ. of Helsinki (Finland)
2Ural Federal Univ. (Russian Federation)
3Åbo Akademi (Finland)
4Finnish Geospatial Research Institute (Finland)