areaSDF: Areas of elements of SpatialDataFrame objects

In KristinaHelle/sensors4plumes: Test and Optimise Sampling Designs Based on Plume Simulations

Description

Returns the areas of all elements in a SpatialDataFrame object, e.g. of all grid cells in a SpatialPixelsDataFrame or of all Polygons in a SpatialPolygonsDataFrame. If the elements are Points, 0s are returned with a warning.

Usage

areaSDF(x)

Arguments

x	SpatialDataFrame-class

Value

Vector of the areas of elements of the SpatialDataFrame (same length as the SpatialDataFrame):
SpatialIndexDataFrame, SpatialPointsDataFrame: 0s, with warning.
SpatialPixelsDataFrame, SpatialGridDataFrame: cell size, repeated for each cell
SpatialPolygridDataFrame: sum of cell sizes of all cells related to the respective index value
SpatialPolygonsDataFrame: sum of area of all polygons related to the respective Polygons object
SpatialLinesDataFrame: sum of length of lines related to the respective Lines object

Author(s)

Kristina B. Helle, [e-mail]

Examples

data(SIndexDF)
areaSDF(SIndexDF)

data(SPolygridDF)
areaSDF(SPolygridDF)

data(SLinesDF)
areaSDF(SLinesDF)

KristinaHelle/sensors4plumes documentation built on May 7, 2019, 12:31 p.m.