how to create maps from topojson files and csv data?

The geoJSON driver in gdal/ogr will read it from version 2 of OGR:

http://www.gdal.org/ogr/drv_geojson.html

but I think that's very leading-edge (I seem to have v 1.10  on my system).

So the solution would seem to be to convert your topojson to something
that your gdal/ogr can handle, and then read it into R using the rgdal
package readOGR function. I'm having trouble finding a utility that
will do the conversion that way, since most people start from
something and convert it _to_ topojson for fast rendering! I think it
might be necessary to cruft something  together from various python or
javascript modules lying around the web,

From there its straightforward SpatialPolygonsDataFrame stuff.

Barry

On Sun, Dec 15, 2013 at 10:49 PM, Miguel Fiandor Guti?rrez

Hi,

I do have some maps in topojson format, and I would like to display data on
them that i have in .CSVs and access database. So far I play with them with
d3.js,<http://transparenciadecuentaspublicas.es/2012/madrid/gastos-personales>but
i'd like to learn too with R.
My question is not about the csv or db to data frame or similar, is how to
display any data variable with this kind of map files, I have not found
literature about it. Yes, each region of the map has its own id code.

The output will end on a pdf file or website, but as soon as I can print
the map or export it it would be enough.

Thanks

Miguel Fiandor

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