get_counts: counts pixel values according to their classes

In uavRst: Unmanned Aerial Vehicle Remote Sensing Tools

Description

counts pixel values according to their classes

Usage

get_counts(
  ids = c(1, 2),
  position = NULL,
  imageFiles = NULL,
  buffersize = 1.5,
  outPrefix = "classified_index_",
  ext = ".tif",
  path = tempdir(),
  dropChars = 0
)

Arguments

ids	numeric. the ids used for the training
position	sp. spatialpoint object containing the centre target positions
imageFiles	raster* image/classification file
buffersize	numeric. radius in meters around position
outPrefix	character. out prefix string
ext	character. extension
path	character. output path
dropChars	numeric. number of characters that should be dropped at the end of the filename

Value

data frame containing the number of pixels per class

Examples

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

##- project root folder
 setwd(tempdir())


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

# read data
 position <- raster::shapefile("position.shp")
 imageFiles <-Sys.glob(paths = paste0("rgb*","tif"))
 imageTrainStack<-lapply(imageFiles, FUN=raster::stack)

## get counts
 df1<-get_counts(position = position,
                      ids = c(100,200),
               imageFiles = imageFiles,
                outPrefix = "",
                      ext = ".tif",
                     path = tempdir())
head(df1)
##+
## End(Not run)

uavRst documentation built on Dec. 30, 2019, 5:06 p.m.