[R-sig-Geo] Plotting simple features sf with ggplot2

[Barry Rowlingson]

Ah, sadly my vague memories and recalls didn't stretch to that.

Thanks

On Thu, Dec 8, 2016 at 1:19 PM, Thierry Onkelinx
<thierry.onkelinx at inbo.be> wrote:
> Hi Barry,
>
> xlim(c(-100, 100)) is the ggplot shorthand for scale_x_continuous(limits =
> c(-100, 100)) This sets x coordinates outside the limits to NA. The
> solution is to use coord_cartesian(xlim = c(-100, 100))
>
> See http://rpubs.com/INBOstats/zoom_in for more details and some examples.
>
> Best regards,
>
>
> ir. Thierry Onkelinx
> Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
> Forest
> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
> Kliniekstraat 25
> 1070 Anderlecht
> Belgium
>
> To call in the statistician after the experiment is done may be no more
> than asking him to perform a post-mortem examination: he may be able to say
> what the experiment died of. ~ Sir Ronald Aylmer Fisher
> The plural of anecdote is not data. ~ Roger Brinner
> The combination of some data and an aching desire for an answer does not
> ensure that a reasonable answer can be extracted from a given body of data.
> ~ John Tukey
>
> 2016-12-08 12:19 GMT+01:00 Barry Rowlingson <b.rowlingson at lancaster.ac.uk>:
>
>> On Wed, Dec 7, 2016 at 10:43 PM, Michael Sumner <mdsumner at gmail.com>
>> wrote:
>>
>> > I think there is now a majority opinion that fortify is not such a good
>> > idea for simple feature (or in general: spatial) geometries.
>> >
>> >
>> > It's not a great idea, but you can do it and it already works.
>>
>> It works, for some values of "works". There appears to be serious
>> problems if polygons are clipped using xlim and ylim. I have a feeling
>> I've seen this before, and possibly may even have reported it, but the
>> problem still exists. I have a vaguer feeling Hadley Wickham may have
>> even been made aware, but its also possible that I just noticed it,
>> went "Gah!" and carried on using base graphics without telling anyone.
>>
>> Anyway, hopefully reproducible examples here. The columbus example is
>> especially gross:
>>
>> https://gist.github.com/barryrowlingson/79f0964777496e78c57d6be825ea68f3
>>
>> It seems that if a fortified data set has points that are outside the
>> bounding box, they are removed and then the polygon drawn from the
>> remaining points. This can seriously mash features, as seen in the
>> gist example.
>>
>> But maybe its my R version (3.3.1) or my ggplot2 version (updated just
>> now from CRAN) or grid graphics package or graphics device?
>>
>> Barry
>>
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