get.arcdata

0th

Percentile

Function for importing the contents of an ARC file into R

This function reads and imports into R the contents of an arcs definition file.

Keywords
file
Usage
get.arcdata(datadir, coverage, filename="arc.adf")
Arguments
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. By default, it is called 'arc.dat'.
Value

This function returns a list with two elements. The first one is a data frame containing the next fields (by columns):
ArcID
A number that identifies this arc.
ArcUserID
Identifier defined by the user.
FromNode
The node where the arc begins.
ToNode
The node where the arc finishes.
LeftPoly
The number of the polygon that is to the left of the arc.
RightPoly
The number of the polygon that is to the right of the arc.
NVertices
The number of vertices the arc has.
The second element is a list that stores the vertices of the arc. So, each element in this list is also a list of two arrays: the first for the X coordinates and the secod for the Y coordinates.

Aliases
  • get.arcdata
Documentation reproduced from package RArcInfo, version 0.4-12, License: GPL (>= 2)

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