[R-sig-Geo] FW: Re: Load a map png in ggplot2 (workaround for missing world map support in ggmap)

[Roger Bivand]

On Wed, 1 Oct 2014, Bachiller Eneko wrote:

> Hi Roger,
> This is the website I was talking about...
> https://stat.ethz.ch/pipermail/r-sig-geo/2013-October/019635.html
>
> I guess this is the correct email group for my question. If not please 
> let me know.

Likely correct group, but that link was necessary to see the context from 
before your posting. However, it is unlikely that ggmap/ggplot2 is the 
tool that is needed here, they does not "understand" spatial data or 
spatial reference systems well. Please find the book I refered to, or 
borrow it via IMR from NILU (there is ebrary access at Høgskolen i 
Sør-Trøndelag). Books still beat blogs in consistency and completeness.

Roger

> Apologizes for any inconvenient and thanks for your suggestion.
> All the best,
>
> Eneko
>
> -----Original Message-----
> From: Roger Bivand [mailto:Roger.Bivand at nhh.no]
> Sent: Wednesday, October 01, 2014 11:25 AM
> To: Bachiller Eneko
> Cc: r-sig-geo at r-project.org
> Subject: Re: [R-sig-Geo] FW: Re: Load a map png in ggplot2 (workaround for missing world map support in ggmap)
>
> On Wed, 1 Oct 2014, Bachiller Eneko wrote:
>
>> Dear Markus,
>>
>> I have found the same problem and I would like to know if you found
>> out any solution... I mean, I have some maps (from Surfer) that I
>> would like to import to ggmap. The point would be to be able to import
>> the basemap and georeference that (adjust x/y axes) in order to plot
>> my spatial data there. I guess this is the same question you made in
>> this blog in Oct
>> 2013 but I ignore if you solved that...
>
> I don't think anyone here knows what blog, and I don't see a link to it.
> Note that this list is plain text only, and your posting is HTML.
>
> Please consult Oscar Perpigñan's book, in which he explains that what you are trying to do isn't smart, and shows how to use his package rasterVis.
> You need to import the raster file as a georeferenced raster file - guessing where things are may be acceptable for artistic wallpaper, but is no use in analysis.
>
> Hope this helps,
>
> Roger
>
>>
>> I would be very grateful if you could help me with some ideas and/or
>> possible alternative options. Thank you very much ended. Kindest
>> regards,
>>
>> Dr. Eneko Bachiller
>> Institute of Marine Research
>> Bergen, Norway
>>
>> 	[[alternative HTML version deleted]]
>>
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>
> --
> Roger Bivand
> Department of Economics, Norwegian School of Economics, Helleveien 30, N-5045 Bergen, Norway.
> voice: +47 55 95 93 55; fax +47 55 95 91 00
> e-mail: Roger.Bivand at nhh.no
>

-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no