sperich (version 1.5-9)

createHeightmask: Height-Mask Creation

Description

This function creates a height-mask as a grid based on given dimension and coordinates.

Usage

createHeightmask(dataset.height, dimension, origin, resolution=1)

Value

This function returns a grid which contains the height information of the observed area.

Arguments

dataset.height

A dataframe containing the longitude and lattitude of the grid cell location as 'long' and 'lat' and the height of the cell as 'height'. If the value of 'dataset.height' is 'NULL', the returned grid contains 0 as height-information of every cell.

dimension

The dimension of the processed grid.

origin

The geographic coordinates of the origin of the grid.

resolution

The resolution of the grid in (geographical) degree.

Author

Maximilian Lange, Sven Lautenbach

Details

This routine creates a height-mask as a grid. As Input a dataset with height-information is needed. The grid will be created with a given dimension.

Examples

##load data
data(dataset.all.species)
data(dataset.height)

##create grid parameters
dimension <- getDimension(dataset.all.species, resolution=1)
origin <- getOrigin(dataset.all.species)

##create height-matrix
height.matrix <- createHeightmask(dataset.height, dimension, origin, resolution=1)