-------- ESRI histmap map function -------- 

 
arc_histmap      : produce a map with histogram legend using ArcView shape files
arc_histmapd     : An example of using arc_histmap() 
arc_histmapd2    : An example of using arc_histmap() 
arc_histmapd3    : An example of using arc_histmap() 
arc_histmapd4    : An example of using arc_histmap() 
arc_histmapd5    : An example of using arc_histmap() 
arc_histmapd6    : An example of using arc_histmap() 
arc_histmapd7    : An example of using arc_histmap() 
arc_histmapd8    : An example of using arc_histmap() 
 Support functions for arc_histmap
am_histcmap      : sets the colormap for the histmap figure
am_histlegend    : compute legend figure for histmap
am_histmap       : uses rubber band rectangle to select a sub-region of the histmap
am_histncat      : sets the # of histogram bars in histmap
am_histquit      : closes histmap figure windows
am_histvariable  : sets the variable for use by histmap