LtRun: Run LandTrendr Algorithm

In IFGI-Project/LandTendR-Package: LandTrendR Algorithm in R

Description

This function built a ImageCollection suitable for LT analysis, using Harmonization and pre-processes before running the Landtrendr Algorithms The function starts building the image and an additional NBR index that helps the algorithm to calculate the magnitude of change. This function is based on rgee package, thus the outcome of this function is a ee.Image object.

Usage

LtRun(
  startYear = 2010,
  endYear = 2017,
  startDay = "06-01",
  endDay = "09-30",
  aoi = pkg.globals$aoi_,
  runParams = pkg.globals$runParam
)

Arguments

startYear	Numeric variable - Starting year of th analysis (Default: 2010)
endYear	Numeric variable - Ending year of th analysis (Default: 2017)
startDay	String variable - date tie to the Starting year (Default: '06-01')
endDay	String variable - date tie to the Ending year (Default: '09-30')
aoi	Polygon sf Geometry - Area of Interest (Default: US County from sf dataset)
runParams	Parameters for Landtrendr Analysis - By default the package take the following values: maxSegments = 6, spikeThreshold = 0.9, vertexCountOvershoot = 3, preventOneYearRecovery = TRUE,recoveryThreshold = 0.25, pvalThreshold = 0.05, bestModelProportion = 0.75, minObservationsNeeded= 6

Value

lt ee.Image object

IFGI-Project/LandTendR-Package documentation built on Feb. 5, 2022, 3:54 a.m.