meteoland (version 2.0.0)

SpatialPointsTopography: Creates a 'SpatialPointsTopography'

Description

Function SpatialPointsTopography creates an object of class SpatialPointsTopography-class containing topographic variables for a set of points.

Usage

SpatialPointsTopography(
  points,
  elevation,
  slope = NULL,
  aspect = NULL,
  proj4string = CRS(as.character(NA))
)

Value

Function SpatialPointsTopography returns an object 'SpatialPointsTopography-class'.

Arguments

points

An object of class SpatialPoints-class.

elevation

Elevation values (in m) of the points.

slope

Slope values (in degrees) of the points.

aspect

Aspect values (in degrees from North) of the points.

proj4string

Object of class CRS in the first form only used when points does not inherit from Spatial.

Author

Miquel De Cáceres Ainsa, CREAF

Details

If either slope = NULL or aspect = NULL then when estimating weather on the object locations radiation will be calculated assuming a flat surface.

See Also

SpatialPointsTopography-class

Examples

data(examplegridtopography)

#Creates spatial topography points from the grid
p = 1:2
points = as(examplegridtopography,"SpatialPoints")[p]
spt = SpatialPointsTopography(points, examplegridtopography$elevation[p],
                              examplegridtopography$slope[p],
                              examplegridtopography$aspect[p])
spt

#Alternatively, use coercing and subsetting
spt = as(examplegridtopography, "SpatialPointsTopography")[p]
spt