fieldDraw: Making draws (lines or polygons)

In OpenDroneMap/FIELDimageR: A Tool to Analyze Orthomosaic Images From Agricultural Field Trials

Making draws (lines or polygons)

Description

Extracting information (x, y, value) for all cells in a line or polygon. Also, this function can be used to evaluate distances between objects or objects length.

Usage

fieldDraw(
  mosaic,
  line = TRUE,
  ndraw = 1,
  dist = FALSE,
  distSel = 0.5,
  round = 5,
  value = 1,
  pch = 16,
  cex = 0.7,
  col = "red",
  lwd = 1
)

Arguments

mosaic	object mask of class stack from the function fieldMask.
line	if it is TRUE the selected area will be a line otherwise it will be a polygon (line=FALSE).
ndraw	number of drawings (lines or polygons).
dist	if it is TRUE the distance among objects or objects length will be calculated (mosaic should be the mask from function fieldMask and line should be line=TRUE).
distSel	integer indicating which proportion of estimated distances should be selected (default 0.5). If distSel = 1 all estimated distances will be saved. Some distances can be artifacts caused by the mask estimation and can inflate the number of distances.
round	integer indicating the number of decimal places (round) or significant digits (signif) to be used.
value	integer indicating the value in the mask. If value=1 the objects length will be estimated. If value = 0 the distance between objects will be estimated.
pch	point symbol, please check help("points").
cex	character (or symbol) expansion: a numerical vector, please check help("points").
col	color code or name, please check help("points").
lwd	line width, please check help("lines").

Details

fieldDraw

Value

A list four elements

• drawData is a matrix with each cell position "x" and "y" (line/polygon) and the cell value "layer".

• drawObject is the the new SpatialPolygons or SpatialLines object.

• drawSegments is a simplified drawData matrix with segments defined in paramter "value".

• drawDist is the distance or length between objects.

OpenDroneMap/FIELDimageR documentation built on May 4, 2024, 4:24 a.m.