ShapeSelectForest: Shape Selection for Landsat Time Series of Forest Dynamics

Landsat satellites collect important data about global forest conditions. Documentation about Landsat's role in forest disturbance estimation is available at the site <http://landsat.gsfc.nasa.gov/?p=9513>. By constrained quadratic B-splines, this package delivers an optimal shape-restricted trajectory to a time series of Landsat imagery for the purpose of modeling annual forest disturbance dynamics to behave in an ecologically sensible manner assuming one of seven possible "shapes", namely, flat, decreasing, one-jump (decreasing, jump up, decreasing), inverted vee (increasing then decreasing), vee (decreasing then increasing), linear increasing, and double-jump (decreasing, jump up, decreasing, jump up, decreasing). The main routine selects the best shape according to the minimum Bayes information criterion (BIC) or the cone information criterion (CIC), which is defined as the log of the estimated predictive squared error. The package also provides parameters summarizing the temporal pattern including year(s) of inflection, magnitude of change, pre- and post-inflection rates of growth or recovery. In addition, it contains routines for converting a flat map of disturbance agents to time-series disturbance maps and a graphical routine displaying the fitted trajectory of Landsat imagery.

AuthorMary C. Meyer, Xiyue Liao, Elizabeth Freeman, Gretchen G. Moisen
Date of publication2016-10-28 19:12:53
MaintainerXiyue Liao <xiyue@rams.colostate.edu>
LicenseGPL (>= 2)
Version1.3
https://sites.google.com/site/shaperestrictedregression/shapeselectforest

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Files

ShapeSelectForest
ShapeSelectForest/inst
ShapeSelectForest/inst/CITATION
ShapeSelectForest/inst/extdata
ShapeSelectForest/inst/extdata/helpexamples
ShapeSelectForest/inst/extdata/helpexamples/MINI_FLATPRED.img
ShapeSelectForest/inst/extdata/helpexamples/MINI_NDVI.img
ShapeSelectForest/inst/extdata/helpexamples/MINI_FI.img
ShapeSelectForest/inst/extdata/helpexamples/MINI_B5.img
ShapeSelectForest/inst/extdata/helpexamples/MINI_NBR.img
ShapeSelectForest/NAMESPACE
ShapeSelectForest/data
ShapeSelectForest/data/ymat.rda
ShapeSelectForest/data/edf0s.rda
ShapeSelectForest/R
ShapeSelectForest/R/shape.R
ShapeSelectForest/MD5
ShapeSelectForest/DESCRIPTION
ShapeSelectForest/ChangeLog
ShapeSelectForest/man
ShapeSelectForest/man/f2a.map.jpeg.Rd ShapeSelectForest/man/shapeparams.Rd ShapeSelectForest/man/flat2annual.Rd ShapeSelectForest/man/f2a.raster.Rd ShapeSelectForest/man/flat2parameter.Rd ShapeSelectForest/man/getedf0.Rd ShapeSelectForest/man/edf0s.Rd ShapeSelectForest/man/shape.Rd ShapeSelectForest/man/ymat.Rd ShapeSelectForest/man/plotshape.Rd ShapeSelectForest/man/f2p.raster.Rd ShapeSelectForest/man/ShapeSelectForest-package.Rd

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