To configure, compile and install INTERPOS, please see INSTALL. Once installed (by your system administrator or yourself), you can use `pkg-config interpos --cflags --libs` etc to compile and link your code with the INTERPOS library. Head to the examples/f90 or tests/f90 directories for example programs and build instructions. In the folder interp2D several files allowing 2D interpolation, from cartesian to cartesian, or ala polar coordinates, are available using two times 1D interpolation with interpos. Using the periodic boundary conditions for polar coordinates in the angle direction for example. See http://spc.epfl.ch/interpos for more information or ask Olivier.Sauter@epfl.ch