Assemble 'SSN' Objects
Accumulate edge values downstream
Calculate the additive function value for edges in a LSN
Calculate additive function values for sites in a Landscape Network (L...
Copy streams data to temporary directory
Convert lines to a landscape network (LSN)
Incorporate sites into a Landscape Network
Assemble an SSN object from an LSN
Check an SSN object
SSNbler: Assemble 'SSN' Objects
Get upstream distance for edges in a Landscape Network (LSN)
Get upstream distance for sites in a Landscape Network (LSN)
Import, create and assemble data needed to fit spatial-statistical stream-network models using the 'SSN2' package for 'R'. Streams, observations, and prediction locations are represented as simple features and specific tools provided to define topological relationships between features; calculate the hydrologic distances (with flow-direction preserved) and the spatial additive function used to weight converging stream segments; and export the topological, spatial, and attribute information to an `SSN` (spatial stream network) object, which can be efficiently stored, accessed and analysed in 'R'. A detailed description of methods used to calculate and format the spatial data can be found in Peterson, E.E. and Ver Hoef, J.M., (2014) <doi:10.18637/jss.v056.i02>.