Use Mac printing manager. Based on Cave Map Language, which is a text-based system for writing down just about all the data just by inspecting it. This is because CML accepts all the ways in which we normally write data in our survey books. It has its own memory manager so it is not limited in size or number of files it can process or the complexity of the cave. One or more text files.
Connectivity is derived from semantics so the data can appear in any sequence.
Vectors is also a text editor so data files can be manually edited and output files viewed by it. Feet and inches and metric are supported. This can be used to attach passage attribute information to stations and party information to trips. Least squares, based on the CMAP algorithms. Yes, as scalable line-plots in growable, scrollable windows.