Network topology for fluvial-system mapping?

[davenquinn]

One interesting feature of some of the geologic mapping we've done using this framework is fairly well-developed networks of fluvial features. It'd be interesting to incorporate some sort of formal representation of network topology, to do things like stream orders, etc. It would fit with the mission of this module to encourage more

This would have interesting implications for relationships between, e.g. river centerline datasets and lake shorelines or river/floodplain edges. But perhaps this sort of capability would be useful to geormorphologists.