A trial version of a function for deep-cleaning a river network.
Sometimes a shapefile contains errors that are not obvious at an initial check, typically vertices that should not be there.
This function steps through each segment in sequence, and allows the user to interactively remove vertices.
cleanup_verts(rivers, startwith = 1)
| rivers | The river network object to use |
|---|---|
| startwith | The segment (number) to start with, defaulting to |
A new river network object, see rivernetwork
Stepping through a large and messy river network can be time-consuming. To resume a cleanup session, use the startwith= argument and the last returned river network. For example, if rivers1 <- cleanup_verts(rivers) were initially called and the user selected "save & close" at segment 100, cleanup can be resumed by calling rivers2 <- cleanup_verts(rivers1, startwith=100).
line2network
data(abstreams0,Koyukuk0,Kenai1) # abstreams_fixed1 <- cleanup_verts(abstreams0) # Koyukuk <- cleanup(Koyukuk0) # Kenai <- cleanup(Kenai1)