1. 2023-11-30 Re: [GRASS-user] cost surface with negative friction grass-use Michael Barton via 2. 2023-11-30 Re: [GRASS-user] cost surface with negative friction grass-use Anna_Petrášová_ 3. 2023-11-29 Re: [GRASS-user] cost surface with negative friction grass-use Michael Barton via 4. 2023-11-29 Re: [GRASS-user] cost surface with negative friction grass-use Anna_Petrášová_ 5. 2023-11-28 [GRASS-user] cost surface with negative friction odd grass-use Michael Barton via