extract.val: Extract layer values by latlon

In divagis: Provides tools for quality checks of georeferenced plant species accessions.

Description

This function is a convenience wrapper function to extract variable values from a database of geographical layers.

Usage

extract.val(latlon, layers)

Arguments

latlon	latlon is a matrix of two columns for latitude and longitude.
layers	layers is a list of complete layer names. The name is used for display; the value are used for reading the layers.

Details

See description. The function assumes so far that the layers are in a format readable by readGDAL; all layers must be standardized to the same reference grid and resolution.

Value

Returns a matrix of several columns containing the original lat/lon, the converted sequential id based on the grid, and the extracted values.

Author(s)

Reinhard Simon

References

none

Examples

# to be done

divagis documentation built on May 1, 2019, 10:25 p.m.