poly_stat: Calculate descriptive statistics of raster as segmented by...

In gisma/uavRst: Unmanned Aerial Vehicle Remote Sensing Tools

Calculate descriptive statistics of raster as segmented by polygons

Description

calculate statitiscs of polygon based raster extraction. Returns a spatialpolygon dataframe containing decriptive statistics

Usage

poly_stat(
  rasternames = NULL,
  spdf = NULL,
  count = 1,
  min = 1,
  max = 1,
  sum = 1,
  range = 1,
  mean = 1,
  var = 1,
  stddev = 1,
  quantile = 10,
  parallel = 1,
  proj = "+proj=utm +zone=30 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs",
  path_run = tempdir(),
  giLinks = NULL
)

Arguments

rasternames	vector of raster* objects default is NULL
spdf	spatial polygon dataframe default is NULL
count	0 1 switch
min	0 1 switch
max	0 1 switch
sum	0 1 switch
range	0 1 switch
mean	0 1 switch
var	0 1 switch
stddev	0 1 switch
quantile	number of quantile
parallel	run it parallel default is 1
proj	projection string
path_run	run time folder for all kind of calculations, by default tempdir()
giLinks	list of GI tools cli pathes, default is NULL

Value

data frame containing the descriptive statistic of all corresponding raster* objects for each given polygon

Author(s)

Chris Reudenbach

Examples

## Not run: 
# required packages
require(uavRst)
require(link2GI)

# create and check the links to the GI software
giLinks<-uavRst::linkGI(linkItems = c("saga","gdal"))
if (giLinks$saga$exist) {

# get the rgb image, chm and training data
url <- "https://github.com/gisma/gismaData/raw/master/uavRst/data/tutorial_data.zip"
utils::download.file(url, file.path(tempdir(),"tutorial_data.zip"))
unzip(zipfile = file.path(tempdir(),"tutorial_data.zip"), exdir = tempdir())

polyStat <- poly_stat("chm_3-3_train1",
                      spdf = "rgb_3-3_train1.shp",
                      giLinks=giLinks)
                      
raster::plot(polyStat)
}
##+
## End(Not run)

gisma/uavRst documentation built on Feb. 14, 2023, 8:49 a.m.