Install the stable version of
sgsRfrom CRAN with:
Install the most recent development version of
sgsR from Github with:
sgsR provides a collection of stratification and sampling algorithms that use auxiliary information for allocating sample units over an areal sampling frame. ALS metrics, like those derived from the
lidR package are the intended inputs.
Other remotely sensed or auxiliary data can also be used (e.g. optical satellite imagery, climate data, drone-based products).
sgsR is being actively developed, so you may encounter bugs. If that happens, please report your issue here by providing a reproducible example.
#--- Load mraster files ---# r <- system.file("extdata", "mraster.tif", package = "sgsR") #--- load the mraster using the terra package ---# mraster <- terra::rast(r) #--- apply quantiles algorithm to mraster ---# sraster <- strat_quantiles(mraster = mraster$zq90, # use mraster as input for stratification nStrata = 4) # produce 4 strata #--- apply stratified sampling ---# existing <- sample_strat(sraster = sraster, # use sraster as input for sampling nSamp = 200, # request 200 samples mindist = 100, # samples must be 100 m apart plot = TRUE) # plot output
Check out the package documentation to see how you can use
sgsR functions for your work.
sgsR was presented at the ForestSAT 2022 Conference in Berlin. Slides for the presentation can be found here.
We are thankful for continued collaboration with academic, private industry, and government institutions to help improve
sgsR. Special thanks to to:
|Martin Queinnec||University of British Columbia|
|Joanne C. White||Canadian Forest Service|
|Piotr Tompalski||Canadian Forest Service|
|Andrew T. Hudak||United States Forest Service|
|Ruben Valbuena||Swedish University of Agricultural Sciences|
|Antoine LeBoeuf||Ministère des Forêts, de la Faune et des Parcs|
|Ian Sinclair||Ministry of Northern Development, Mines, Natural Resources and Forestry|
|Grant McCartney||Forsite Consultants Ltd.|
|Jean-Francois Prieur||Université de Sherbrooke|
|Murray Woods||(Retired) Ministry of Northern Development, Mines, Natural Resources and Forestry|