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Spatial data in R

Spatial data in R . M Sumner. Outline. Packages Spatial Import and export Maps and projections Big data Community , resources Sweave ?. Packages. s p, rgdal , maptools , gstat , spdep , spacetime RNetCDF , ncdf , ncdf4 maps, mapdata , Rgooglemaps , dismo s patstat r aster

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Spatial data in R

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  1. Spatial data in R M Sumner

  2. Outline • Packages • Spatial • Import and export • Maps and projections • Big data • Community, resources • Sweave?

  3. Packages • sp, rgdal, maptools, gstat, spdep, spacetime • RNetCDF, ncdf, ncdf4 • maps, mapdata, Rgooglemaps, dismo • spatstat • raster • adehabitat • trip, tripEstimation • CRAN Task Views • . . . and much more!

  4. R Spatial • Basic R graphics and data structures • sp - GIS-like data structures • Formal Spatial classes • Grids – images, rasters, terrains, DEMs • Points, lines, polygons, grids with attribute data

  5. NetCDF • NetCDF in R – ncdf, ncdf4, rgdal (maybe), and RNetCDF • R handles multi-dimensional arrays and dimension metadata, packages provide read/write access • GIS and NetCDF models have only limited overlap, it’s always difficult

  6. Projections • rgdal - general input/output and map projection support • Transform methods for Spatial objects • Raster reprojection is destructive – involving resampling • Raster package

  7. Trip package • Extension of SpatialPointsDataFrame • Work with multiple tracks in a single object • Functions for filtering, gridding, summary • Convert track points to shapefile lines

  8. Community • R-Sig-Geo, R-Sig-Eco, Animov • R-help, R-devel • R-downunder • Stackoverflow.com • R-bloggers.com

  9. Resources • CRAN • Quick R http://www.statmethods.net/ • Crantastic! http://crantastic.org/ • R Reference Card: http://cran.r-project.org/doc/contrib/Short-refcard.pdf • Ross: http://www.stat.auckland.ac.nz/~ihaka/

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