Geographia Polonica 2018, Volume 91, Issue 2, pp. 143-170 https://doi.org/10.7163/GPol.0115 INSTITUTE OF GEOGRAPHY AND SPATIAL ORGANIZATION POLISH ACADEMY OF SCIENCES www.igipz.pan.pl www.geographiapolonica.pl PHYSICO-GEOGRAPHICAL MESOREGIONS OF POLAND: VERIFICATION AND ADJUSTMENT OF BOUNDARIES ON THE BASIS OF CONTEMPORARY SPATIAL DATA Jerzy Solon1 • Jan Borzyszkowski2 • Małgorzata Bidłasik2 • Andrzej Richling34 • Krzysztof Badora5 • Jarosław Balon6 • Teresa Brzezińska- -Wójcik7 • Łukasz Chabudziński7 • Radosław Dobrowolski7 • Izabela Grzegorczyk2 • Miłosz Jodłowski6 • Mariusz Kistowski8 • Rafał Kot9 • Paweł Krąż6 • Jerzy Lechnio3 • Andrzej Macias10 • Anna Majchrow- ska11 • Ewa Malinowska3 • Piotr Migoń12 • Urszula Myga-Piątek13 • Jerzy Nita13 • Elżbieta Papińska11 • Jan Rodzik7 • Małgorzata Strzyż14 • Sławomir Terpiłowski7 • Wiesław Ziaja6 1 Institute of Geography and Spatial Organization 8 Institute of Geography Polish Academy of Sciences University of Gdańsk Twarda 51/55, 00-818 Warsaw: Poland Bażyńskiego 4, 80-309 Gdańsk: Poland Corresponding Author’s e-mail:
[email protected] 9 Faculty of Earth Sciences 2 Institute of Environmental Protection Nicolaus Copernicus University in Toruń – National Research Institute Lwowska 1, 87-100 Toruń: Poland Krucza 5/11d, 00-548 Warsaw: Poland 10 Faculty of Geographical 3 Faculty of Geography and Regional Studies and Geological Sciences University of Warsaw Adam Mickiewicz University Krakowskie Przedmieście 26/28, 00-927 Dzięgielowa 27, 61-680 Poznań: Poland Warsaw: Poland 11 Faculty of Geographical Sciences 4 Faculty of Health and Social Sciences University of Łódź Pope John Paul II State School of Higher Education Narutowicza 88, 90-139 Łódź: Poland in Biała Podlaska Sidorska 95/97, 21-500 Biała Podlaska: Poland 12 Institute of Geography and Regional Development 5 Faculty of Natural Sciences and Technology Wrocław University Opole University pl.