Hi! For information about how to use the library see csf.pdf which can found at http://pcraster.geog.uu.nl. More information about PCRaster can be found at: http://www.pcraster.nl and http://pcraster.geog.uu.nl. Questions can be directed to the PCRaster mailing list: http://pcraster.geog.uu.nl/support.html Have fun! PCRaster research and development team.