[R] how to import map data (maptools?) from a html set of 'coords'

Michael Denslow michael.denslow at gmail.com
Wed Mar 3 11:44:33 CET 2010

Hi Sylvian,

On Tue, Mar 2, 2010 at 1:15 PM, sylvain willart
<sylvain.willart at gmail.com> wrote:
> Dear R users,
> I would like to draw map and import it in maptools/spatstat packages.
> The 'raw data' I have come from a web page (<map>...</map>) and are
> basically a list of coordinates of a polygon.
> I would like to know how to import them in R; I checked the maptools
> packages, but all the examples use existing .dbf files.
> I just have a (serie of) text file(s) looking like this:
> For example, for the French Region Burgundy:
> <area  href="region.asp?reg=26" shape="poly" title="Bourgogne" alt="Bourgogne"
> coords="208,121,211,115,221,113,224,115,225,120,229,122,232,128,251,125,255,
> 130,256,136,266,138,268,148,267,154,263,160,267,168,267,180,262,
> 175,256,178,254,184,248,184,243,187,237,187,232,185,234,181,227,
> 171,216,171,212,166,211,155,208,149,208,135,211,132,213,125,208,
> 121">

It is not clear (to me) from your example what kind of file this is.
Maybe XML, it does not look like GML. readOGR() in the rgdal package
may be a better route to explore, but you need to determine what file
structure is first.

> any idea welcome,
> sylvain
> (If anayone is interested with that type of data, they're available at
> the INSEE website

I can not easily find an example on this site. Perhaps you could
provide a direct link to the file. Lastly, I suspect that the
r-sig-geo mailing list would get you some better answers.


Michael Denslow

I.W. Carpenter Jr. Herbarium [BOON]
Department of Biology
Appalachian State University
Boone, North Carolina U.S.A.
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Communications Manager
Southeast Regional Network of Expertise and Collections

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