The nodelist file contains all the image-map data, and also the network line definition (although some tools allow this to be in a separate file). It is a plain text file. Any line that doesn't match any of those listed below is ignored, but comments should start with `#' to allow for future development.
image = ``filename''
this is required and must come first. It specifies the map image file.
tolerance = [integer]
this is required. It specifies how many pixels away from the defined node position still count as being that node.
Any line starting with `+' is a node definition and must follow the format:
Any line starting with `*' is a line definition and must follow the format:
[comma separated list of node IDs that make the line]