ShapeSelectForest: Shape Selection for Landsat Time Series of Forest Dynamics

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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.

Author
Mary C. Meyer, Xiyue Liao, Elizabeth Freeman, Gretchen G. Moisen
Date of publication
2016-10-28 19:12:53
Maintainer
Xiyue Liao <xiyue@rams.colostate.edu>
License
GPL (>= 2)
Version
1.3
URLs

View on CRAN

Man pages

edf0s
A 21 by 7 Matrix Storing Edf0 Vectors
f2a.map.jpeg
f2a.map.jpeg
f2a.raster
Raster based flat-to-annual function.
f2p.raster
Raster based flat-to-parameter function.
flat2annual
flat2annual
flat2parameter
flat2parameter
getedf0
Get the Edf0 Vector for the Shape Routine
plotshape
The Plot Routine for an Object of the Shape Routine
shape
Shape Selection
shapeparams
Shape Parameters
ShapeSelectForest-package
Shape Selection for Landsat Time Series of Forest Dynamics
ymat
Response Variable Matrix

Files in this package

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