||Is there anyone who has a solution to my problems?
I am creating the shapefiles using the shapelib library: http://shapelib.maptools.org/
Regarding the question of creating multiple layers based on a single shapefile, I could create multiple point shapefiles based off a single attribute (like AGE), but this is undesirable due to the fact I could have over 80 shapefiles.
In ArcMAP, does a multipoint shapefile look similar to having multiple layers, where you can check/uncheck each layer from showing on the screen? If so, it would possible for me to view any combination of ages at one time, or all if I wish.
Any reply is appreciated!