get.cntdata: Function for importing the contents of a CNT file into R
In RArcInfo: Functions to import data from Arc/Info V7.x binary coverages

This function reads and imports into R the contents of a polygon centroid information file.

1	get.cntdata(datadir, coverage, filename="cnt.adf")

`datadir`	Directory under which all the coverages and a directory called 'info' are.
`coverage`	The name of the coverage we want to work with.
`filename`	The name of the file in the coverage directory that stores the data (usually called 'cnt.adf').

This functions returns a list with two elements. The first one is a data frame with the next fields (columns):

`PolygonID`	The polygon itself.
`CoordX`	An array with the X coordinates of the centroid.
`CoordY`	An array with the Y coordinates of the centroid.
`NLabels`	The number of labels this polygon has.