Map

[Konstantinos Petridis]

Dear ggplot2 experts,

I want to construct the map of Greece for several categories of data.
But I want this map to be divided per prefecture as show in the image.

Can you please help me?

Thank you in advance,

Kostas

[Roman Luštrik]

What is the question? Do you have access to proper shapes/polygons?

Cheers,

Roman

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In God we trust, all others bring data.

[Konstantinos Petridis]

Hello,

Thank you for your reply.

l have donloaded a md5 file with the preented structure, but I couldn't find a package to handle such datasets in R.

Best regards,

Kostas

[Sean O'Riordain]

Kostas,

Firstly you'll need a suitable map, I'm guessing that the "Administrative Areas" level 2 data from
http://www.diva-gis.org/gdata

will do the trick.  i.e. go to the above and grab the zip of the shapefiles... unzip and you'll see there are three sets,

GRC_adm0, GRC_adm1, GRC_adm

where 0 is just the country outline, 1 and 2 are internal administration levels - I suspect you want 2...

If you want to look at the shape file, try simply...

# skipping using ggplot2 for the moment...

libary(maptools)
g1 <- readShapePoly('GRC_adm2')

# plain black and white boundaries

plot(g1)

# but what are the administrative "shapes" in there?
str(g1@data)

g1@data

After that you need to be more clear about what data you have and what you want to do! :-) - as Roman says... "What is the question?"

Sean

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[Roman Luštrik]

Try looking at this Spatial view for more information on how to handle spatial data.

http://cran.r-project.org/web/views/Spatial.html

Cheers,

Roman

[Konstantinos Petridis]

Thank you all for your respones. You were very helpful