[R-sig-Geo] mapView: basic interactive viewing of spatial data in R

[Tim Appelhans]

Peter,
can you please provide the output from sessionInfo() so we know which 
packages are available and what platform you are using?

Cheers
Tim

On 24.07.2015 15:54, ping yang wrote:
> Hi Tim,
>
> I installed the packages with the hints (with devtools and leaflet 
> library) successfully, however, when I tried to run the code from 
> http://environmentalinformatics-marburg.github.io/web-presentations/20150723_mapView.html 
> I got issues:
> First, the error came for
>  meuse_rst <- stack(meuse.grid)
> Error in nlayers(b) :
>   error in evaluating the argument 'x' in selecting a method for 
> function 'nlayers': Error in .newCRS(value) :
>   4 arguments passed to .Internal(nchar) which requires 3
>
> And I tried the the code with spatialPolygons:|
> data("DEU_adm2")
> m <- mapView(gadm, burst = FALSE)
> m
> |
> However, the map did not show up instead created a pdf file (with a 
> link inside), I need to copy this link into browser for viewing the map.
>
> Any ideas?
>
> Thanks,
>
> Peter
>
> On Fri, Jul 24, 2015 at 4:39 AM, Tim Appelhans 
> <tim.appelhans at gmail.com <mailto:tim.appelhans at gmail.com>> wrote:
>
>     Dear list members,
>
>     I would like to draw your attention to a little 'project' I've been
>     working on over the past few weeks.
>
>     Using leaflet for R, I have defined some methods for spatial data
>     (e.g.
>     Raster*, Spatial* objects) to quickly visualise them in either the
>     RStudio Viewer pan or the default web browser. The function I created
>     for this is called mapView().
>
>     Think of it as an interactive version of spplot()/plot() for spatial
>     data (though less versatile). It enables zooming, paning and basic
>     layer
>     queries (i.e. printing of the attributes in the @data slot of Spatial*
>     objects + the x/y location of the feature). For Raster* objects
>     queries
>     are currently not available as leaflet translates the data into RGB
>     values for display. Furthermore, background maps can be defined and
>     multiple different spatial object layers can be overlaid.
>     At the moment mapView() lives in our Rsenal package on github
>     (https://github.com/environmentalinformatics-marburg/Rsenal) but
>     this is
>     likely going to change at some point in the not too distant
>     future. This
>     also depends on whether there is active interest in developping this
>     sort of thing further to provide more than the current admittedly
>     rather
>     limited functionality. This, however, would involve JavaScript coding
>     which I do not have any experience with.
>
>     A quick (non-interactive) intorduction can be found here:
>
>     https://metvurst.wordpress.com/
>
>     The full introductory article including interactive examples is
>     published here:
>
>     http://environmentalinformatics-marburg.github.io/web-presentations/20150723_mapView.html
>
>     I hope this may prove useful for some of you.
>     Also, if anyone is keen to get involved in taking this further, please
>     let me know and we will see how to best proceed.
>
>     Best,
>     Tim
>
>     --
>     #####################################
>     Tim Appelhans
>     Department of Geography
>     Environmental Informatics
>     Philipps Universität Marburg
>     Deutschhausstraße 12
>     35032 Marburg (Paketpost: 35037 Marburg)
>     Germany
>
>     Tel +49 (0) 6421 28-25957 <tel:%2B49%20%280%29%206421%2028-25957>
>
>     http://environmentalinformatics-marburg.de/
>
>
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>
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>

-- 
#####################################
Tim Appelhans
Department of Geography
Environmental Informatics
Philipps Universität Marburg
Deutschhausstraße 12
35032 Marburg (Paketpost: 35037 Marburg)
Germany

Tel +49 (0) 6421 28-25957

http://environmentalinformatics-marburg.de/


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