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usepa
SSN2:Spatial Modeling on Stream Networks
Spatial statistical modeling and prediction for data on stream networks, including models based on in-stream distance (Ver Hoef, J.M. and Peterson, E.E., (2010) <DOI:10.1198/jasa.2009.ap08248>.) Models are created using moving average constructions. Spatial linear models, including explanatory variables, can be fit with (restricted) maximum likelihood. Mapping and other graphical functions are included.
Maintained by Michael Dumelle. Last updated 7 months ago.
19 stars 6.61 score 36 scripts 2 dependents
pet221
SSNbler:Assemble 'SSN' Objects
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>.
Maintained by Erin Peterson. Last updated 8 days ago.
10 stars 6.04 score 17 scripts
edgarsantos-fernandez
SSNbayes:Bayesian Spatio-Temporal Analysis in Stream Networks
Fits Bayesian spatio-temporal models and makes predictions on stream networks using the approach by Santos-Fernandez, Edgar, et al. (2022)."Bayesian spatio-temporal models for stream networks" and Santos-Fernandez, Edgar, et al. (2023). "SSNbayes: An R Package for Bayesian Spatio-Temporal Modelling on Stream Networks". In these models, spatial dependence is captured using stream distance and flow connectivity, while temporal autocorrelation is modelled using vector autoregression methods.
Maintained by Edgar Santos-Fernandez. Last updated 2 months ago.
17 stars 5.41 score 6 scripts