GETXprofile             Cross sectional profile through a digital
                        elevation map
RPMG-package            Really Poor Man's GUI: sets up buttons for a
                        graphical user interface in R
XSECDEM                 Cross Sections Using RPMG
rainbow.colors          rainbow.colors
rowBUTTONS              Geometry for the Really Poor Man's GUI
whichbutt               Determines which button was selected in RPGM
