mapview 0.5.0

September 13, 2015
By

(This article was first published on metvurst, and kindly contributed to R-bloggers)

I have put some more effort into mapview.
The current version 0.5.0 has some new features which make the whole experience much more user-friendly.

In a nutshell, changes/additions are as follows:

  • mapView() is now also defined for SpatialPixelsDataFrame
  • all Spatial * DataFrame methods have gained argument zcol to select specific columns from the attribute table
  • SpatialPointsDataFrame method has gained argument radius to scale the circles according to another variable
  • added viewRGB() to render true-/false-color images of RatserStacks/Bricks (like raster::plotRGB)
  • added viewExtent() to view the extent/bbox of Raster/Spatial objects. This is useful for large objects as only the four corners of the extent need to be reprojected (using raster::projectExtent)
  • defined '+'-method to easily add layers to a leaflet/mapview map or combine existing maps
  • defined class 'mapview' which has two slots
    • @object – a list with all objects that are shown on the map
    • @map – the map
  • Raster* methods have gained argument maxpixels to avoid long rendering times (by default set to 500000 pixels which produces acceptable times on my machine)
  • enhanced leaflet integration so that you can use leaflet maps and add features using mapview (e.g. +) or use mapview to create maps and add functionality provided by leaflet (using e.g. %>%)

As an example, this means that you can now do things like

mapView(meuse.grid, zcol = "soil") + viewExtent(meuse) + meuse

to view all points of meuse plus their extent on top of a raster layer of meuse.grid$soil

All new functionality is highlighted in detail in the demo at

http://environmentalinformatics-marburg.github.io/web-presentations/20150723_mapView.html

(the .Rmd source of which is now also included as a vignette in the package)

The package repository can be found at https://github.com/environmentalinformatics-marburg/mapview

To install the package use

library(devtools)
install_github("environmentalinformatics-marburg/mapview")

I hope this update will prove useful for some of you.
Don't hesitate to send me feedback and/or suggestions.

Formal bug reports and feature requests should be filed at
https://github.com/environmentalinformatics-marburg/mapview/issues

Here's an example of viewRGB()

Best

Tim

To leave a comment for the author, please follow the link and comment on their blog: metvurst.

R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...



If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Comments are closed.

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)