| net.object {stream.net} | R Documentation |
Components of the net.object.
The network data structure, as returned from net.qmodel
and net.arcinput, is a list with three components:
| links | a data frame of the topological structure |
| segs | a data frame of the segment structure (pieces of links) |
| cords | a list of the x and y coordinates for each segment |
links has the components
| lid | identifier for the link |
| parent | index of parent link (or 0 if root) |
| left | index of left child (or 0 if terminal) |
| right | index of right child (or 0 if terminal) |
| depth | topological depth of link (number of links from root) |
| first | index of first segment of this link |
| last | index of last segment of this link |
| strahler | Strahler order |
| shreve | Shreve order |
segs has the components
| sid | identifier for the segment (for external ref) |
| link | index to parent link |
| nxt | index of the next segment for this link |
| prev | index of the previous segment for this link |
| up | if segment (and coordinates) oriented upstream = 1, else = 0 |
| length | segment coordinate length |
cords has the components
| x | x coordinates with a sublist for each segment |
| y | y coordinates with a sublist for each segment |
x and y sublists are
the respective sids.)
Denis White, white.denis@epa.gov
net <- net.qmodel (5) net